WO2016163137A1

WO2016163137A1 - Apparatus for manufacturing lamination device

Info

Publication number: WO2016163137A1
Application number: PCT/JP2016/052931
Authority: WO
Inventors: 義和大谷; 謙司佐藤; 一也藤田
Original assignee: 信越エンジニアリング株式会社
Priority date: 2015-04-09
Filing date: 2016-02-01
Publication date: 2016-10-13
Also published as: TWI604952B; CN107428151A; JPWO2016163137A1; KR102488733B1; JP6165384B2; CN115284718A; KR20170135839A; TW201641293A

Abstract

The abrasion of a first workpiece holding surface and a second workpiece holding surface with time is prevented, while the contact areas of the first workpiece holding surface and the second workpiece holding surface with respect to a workpiece are minimized. The present invention pertains to an apparatus for manufacturing a lamination device in which a pair of workpieces is held by a first holding member and a second holding member, respectively, and is positioned and laminated to each other by the relative approaching movements between the first holding member and the second holding member, wherein one of or both the first workpiece holding surface of the first holding member and the second workpiece holding surface of the second holding member are provided with a hard covering layer opposed to one of or both the pair of workpieces and having a front surface thereof formed in a concavo-convex shape by a material harder than those of the first holding member, the second holding member, and the pair of workpieces, and the hard covering layer has a plurality of supporting projections projecting from one of or both the first workpiece holding surface and the second workpiece holding surface toward one of or both the pair of workpieces in a chevron shape and brought into point-contact with one of or both smooth surfaces of the pair of workpieces.

Description

Bonding device manufacturing equipment

The present invention may be a flat panel display (FPD) or a sensor device such as a liquid crystal display (LCD), an organic EL display (OLED), a plasma display (PDP), or a flexible display, or a touch panel type FPD or 3D (three-dimensional). Another plate-like workpiece such as a touch panel, cover glass, cover film, or FPD is used for a plate-like workpiece such as a liquid crystal module (LCM) or flexible printed wiring board (FPC) such as a display or an electronic book. It is related with the manufacturing apparatus of the bonding device bonded together.

Conventionally, as a manufacturing apparatus of this kind of bonding device, the lift pins for transferring the upper substrate and the lower substrate can be moved up and down along the through holes provided in the upper substrate holder and the lower substrate holder, respectively. The upper and lower substrates held and transferred by the arm of the transfer robot at the time of carrying in at atmospheric pressure are lift pins that move up and down so as to protrude from the surfaces of the upper and lower substrate holders, respectively. There is a substrate superimposing apparatus that receives and subsequently moves the lift pins in reverse to transfer the upper substrate and the lower substrate to the surfaces of the upper substrate holder and the lower substrate holder, respectively (for example, refer to Patent Document 1). .
Then, the upper substrate holder holds the received upper substrate by vacuum suction, the lower substrate holder sucks and holds the lower substrate, and the upper substrate holder and the lower substrate holder move closer together. After the inside of the vacuum vessel between the two is evacuated, the upper substrate and the lower substrate are aligned and then superposed and temporarily fixed. After temporarily fixing, the upper substrate holder is released from holding the upper substrate holder, and the upper substrate holder is moved to the original position. The substrate is transferred to the arm of the transfer robot by lift pins and unloaded.

JP 2002-229471 A

However, in such a conventional bonding device manufacturing apparatus, since the upper substrate holder holds the upper substrate by vacuum suction at the suction port, a part of the substrate is bent and deformed toward the suction port and is distorted. Is generated. Accordingly, the upper substrate and the lower substrate cannot be aligned and bonded with high accuracy.
Furthermore, since the operation of peeling the upper substrate from the substrate holding surface of the upper substrate holder is performed in an absolutely dry state in a vacuum (humidity is approximately 0%), the substrate is brought into contact with and peeled from the substrate holding surface. As a result, static electricity is accumulated on the substrate, which is an insulator, and the influence of peeling electrification becomes very large. In addition, since the peeling operation is performed in a sealed space in order to maintain a vacuum state, it is practically easy to remove the generated peeling charge using a blow ionizer or photo ionizer, unlike the peeling operation in the atmosphere. Under difficult conditions.
As a result, arc discharge occurs in the conductive part due to the electric charge due to the peeling charge, and the characteristics change due to static electricity even if the electronic circuit etc. existing on the bonding surface of the substrate is broken or not destroyed. There was a problem.
In addition, after the bonding of the substrates is completed and the pressure is returned to atmospheric pressure, the pair of bonded substrates is separated from the substrate holding surface of the lower substrate holder by lift pins, but the interface between the substrate holding surface and the substrate is smooth. In some cases, the interface between the substrate holding surface and the substrate is attached. In such a case, if a part of the pair of substrates bonded together is forcibly pushed away with the lift pins, the substrate holding surface and the substrate are temporarily in a vacuum state, and the pair of substrates bonded is instantaneously In particular, the substrate is warped by being pulled by the lower substrate holder. Even if the substrates are bonded with high accuracy, if they are partially warped during peeling, there is a problem that the alignment accuracy deteriorates and the product becomes partially defective.
Therefore, in order to solve such a problem, the substrate holding surface and the substrate are formed by forming an uneven portion on the substrate holding surface of the upper substrate holder or the lower substrate holder so that the contact area with the substrate is reduced. It is conceivable to prevent static electricity generated at the interface between the substrate holding surface and the vacuum contact between the substrate and the substrate.
However, in this case, when the substrate holding surface of the upper substrate holder and the substrate holding surface of the lower substrate holder are formed of a metal such as aluminum that is softer than glass or silicon as the material of the substrate, Due to the friction that occurs each time the substrate repeatedly contacts the substrate holding surface of the upper substrate holder or the lower substrate holder, the convex portion gradually wears over time, and finally the substrate comes into surface contact. End up.
As a result, there are problems in that static electricity generated at the interface between the substrate holding surface and the substrate over a long period of time cannot be prevented and vacuum contact between the substrate holding surface and the substrate cannot be prevented.

In order to achieve such an object, a bonding device manufacturing apparatus according to the present invention holds a pair of workpieces on a first holding member and a second holding member, respectively, and the first holding member and the second holding member. Is a manufacturing apparatus for a bonding device that aligns and bonds the pair of workpieces by relative approach movement of the first workpiece holding surface of the first holding member or the second workpiece of the second holding member. One or both of the holding surfaces are opposed to one or both of the pair of workpieces, and the surface is uneven with a material harder than the material of the first holding member, the second holding member, and the pair of workpieces. A hard coating layer formed in a shape, wherein the hard coating layer is one or both of the pair of workpieces from one or both of the first workpiece holding surface and the second workpiece holding surface. It protrudes like a mountain toward the, and having a plurality of bearing projections which respectively contact points on one smooth surface or both smooth surface of the pair of work.

It is explanatory drawing which shows the whole structure of the manufacturing apparatus of the bonding device which concerns on embodiment of this invention, and is a vertical front view before workpiece | work bonding in a workpiece | work bonding process. It is a vertical front view at the time of workpiece | work bonding in a workpiece | work bonding process. It is a vertical front view after a workpiece | work bonding in a workpiece | work bonding process. It is a reduction | decrease longitudinal front view at the time of bonding device peeling in a workpiece | work bonding process.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
A manufacturing apparatus A for a bonding device W according to an embodiment of the present invention, as shown in FIGS. 1 to 4, includes a pair of workpieces W1 and W2 formed in a plate shape, and a first holding member 1 and a second holding member. This is a workpiece laminating apparatus that holds each of the members 2 and aligns and bonds the pair of workpieces W1 and W2 with high precision by the relative close movement of the first holding member 1 and the second holding member 2. It is preferable that the pair of workpieces W <b> 1 and W <b> 2 that have been bonded together are peeled from the first holding member 1 and the second holding member 2.
As a specific example of this workpiece laminating apparatus, the first holding member 1 and the second holding member 2 are arranged to face each other inside the variable pressure chamber B, and the first workpiece W1 and the second workpiece carried into the variable pressure chamber B are used. W2 is received by the holding chuck 3 provided on the first holding member 1 and the second holding member 2, respectively. Thereafter, either one or both of the first holding member 1 and the second holding member 2 are moved closer to each other in the facing direction in the decompressed variable pressure chamber B, and in a direction crossing the facing direction. After relatively aligning, the first workpiece W1 and the second workpiece W2 are bonded (attached) with high accuracy. Thereby, the bonding device W which has sealing space inside is created. Following this, after peeling the first work W1 of the bonding device W from the first holding member 1, the internal pressure and the pressure difference in the sealing space of the bonding device W are restored by returning the transformation chamber B to atmospheric pressure. The pressure difference causes the bonding device W to be evenly pressurized to a predetermined gap. After that, it is preferable to peel the completed bonding device W from the second holding member 2 and carry it out of the variable pressure chamber B.
As shown in FIGS. 1 to 4, the first work W1 and the second work W2 are normally arranged so as to face each other in the vertical direction, and the upper first work W1 and the lower second work W2 are arranged. The direction in which is attached is hereinafter referred to as the “Z direction”. A direction along the first workpiece W1 and the second workpiece W2 that intersects the Z direction is hereinafter referred to as an “XY direction”.

If it demonstrates in detail, the manufacturing apparatus A of the bonding device W which concerns on embodiment of this invention will be provided with the 1st holding member 1 and the 2nd holding member 2 which are provided facing the Z direction, the 1st holding member 1 and the 2nd. A holding chuck 3 for holding the pair of workpieces W1 and W2 detachably and immovably with respect to the holding member 2 and either one or both of the first holding member 1 and the second holding member 2 is Z. Alignment / separation driving unit 4 that moves relatively close to the direction, and one or both of first holding member 1 and second holding member 2 that are relatively adjusted and moved in the XY direction and XYθ direction And a control unit 6 for controlling the operation of at least the holding chuck 3, the contact / separation drive unit 4, the alignment drive unit 5 and the like as main components.
Furthermore, it is preferable to include a peeling member 7 for peeling the pair of workpieces W1, W2 that have been bonded together from the second holding member 2.
Further, as the holding chuck 3 described later, the first work W1 and the second work W2 are sucked toward the first work holding surface 1a of the first holding member 1 and the second work holding surface 2a of the second holding member 2. It is preferable to use a suction chuck 31 to be held. In addition, it is also possible to use an adhesive chuck 32 or an electrostatic chuck that adheres and holds the first workpiece W1 and the second workpiece W2.

The bonding device W is a thin plate-like structure in which components are integrally assembled, such as an FPD, a 3D (three-dimensional) display, an electronic book, or an organic EL display.
The first work W1 is made of, for example, a glass touch panel or a cover glass, and is composed so as to cover the second work W2 made of LCM or a flexible printed wiring board (FPC), thereby forming an FPD, an OLED, or the like. To do.
Further, if necessary, a sealing material W3 is applied to one or both of the opposing surfaces of the first workpiece W1 and the second workpiece W2 using a quantitative discharge nozzle such as a dispenser.
As the sealing material W3, a photo-curing adhesive such as a UV curable optical transparent resin (OCR), which is cured by absorbing light energy such as ultraviolet rays and is cured by the progress of polymerization, is used. Yes.
Further, as other examples, a thermosetting adhesive, a two-component mixed curable adhesive, or the like in which the sealing material W3 is cured by the absorption of heat energy and cured, or the sealing material W3 is not interposed. It is also possible to bond or change the facing surfaces of the first workpiece W1 and the second workpiece W2.

The first holding member 1 is composed of a plate such as a flat plate having a thickness that does not deform (bend) with a rigid body such as a metal, and faces the first workpiece W1 loaded in the Z direction on the surface thereof. And has a first work holding surface 1a in contact therewith.
The second holding member 2 is composed of a plate such as a flat plate having a thickness that does not deform (bend) with a rigid body such as metal, and the surface thereof faces the second workpiece W2 loaded in the Z direction. And has a second work holding surface 2a that comes into contact.
As specific examples of the first workpiece holding surface 1a and the second workpiece holding surface 2a, in the case shown in FIGS. 1 to 4, a part of the first holding member 1 that is in contact with the first workpiece W1 on the substantially smooth surface. Only the first workpiece holding surface 1a is formed, and the second workpiece holding surface 2a is formed only on a part of the substantially flat surface of the second holding member 2 that contacts the second workpiece W2.
Although not shown as another example, the entire surface of the first holding member 1 can be changed to the first workpiece holding surface 1a, or the entire surface of the second holding member 2 can be changed to the second workpiece holding surface 2a. It is.

The first workpiece holding surface 1a and the second workpiece holding surface 2a are formed in a hard concavo-convex shape and have a holding chuck 3 in order to reduce the contact area with the first workpiece W1 and the second workpiece W2. Yes.
That is, either one or both of the first workpiece holding surface 1a of the first holding member 1 and the second workpiece holding surface 2a of the second holding member 2 are opposed to one or both of the pair of workpieces W1 and W2. In addition, a hard coating layer 12 having at least the surface thereof formed in an uneven shape is provided.
Further, either one or both of the first work holding surface 1a of the first holding member 1 and the second work holding surface 2a of the second holding member 2 can be detachably attached to one or both of the pair of works W1, W2. It is preferable that a suction port 31a is provided as the holding chuck 3 to be held on.
The suction port 31a serving as the holding chuck 3 is a suction hole of the suction chuck 31 that is opened to face the surfaces of the first workpiece W1 and the second workpiece W2 and sucks the first workpiece W1 and the second workpiece W2. The suction port 31a is connected to an air passage 31b and communicates with an intake source 31c.
The plurality of suction ports 31a are arranged so as to be dispersed in the XY direction with respect to the first workpiece holding surface 1a and the second workpiece holding surface 2a, and the number and interval of the suction ports 31a are the first workpiece W1 and the second workpiece W2. It is determined according to the size, thickness, material, weight, etc.
The intake source 31c is composed of a pump, a compressor, and the like, and is ventilated from the time of receiving at least the first work W1 and the second work W2 carried into the variable pressure chamber B to the time of bonding by the control unit 6 described later. The operation is controlled so as to suck from the suction port 31a via 31b.
Further, after the first workpiece W1 and the second workpiece W2 are bonded together, the first workpiece W1 held on the first workpiece holding surface 1a of the first holding member 1 or the second workpiece holding surface of the second holding member 2 It is also possible to eject a fluid such as compressed air from the suction port 31a toward the second workpiece W2 held by 2a.

In the case of the example shown in FIGS. 1 to 4 as a specific example of the holding chuck 3, an adsorption chuck 31 and an adhesive chuck 32 are installed on the first work holding surface 1 a of the first holding member 1 disposed above. Only the suction chuck 31 is provided on the second work holding surface 2a of the second holding member 2 disposed below.
The adhesive chuck 32 passes through a through-hole 1h opened in the first holding member 1, and is provided with an elevating part 32a that can be reciprocated in the Z direction, and is opposed to the first work W1 in the Z direction at the tip of the elevating part 32a. The adhesive portion 32b is provided, the adhesive follower portion 32c is provided at the base end of the elevating portion 32a, and the adhesive drive portion 32d is linked to the adhesive follower portion 32c.
A plurality of sets of elevating parts 32a and adhesive parts 32b are arranged so as to be dispersed in the XY direction, and the number and interval of the elevating parts 32a and adhesive parts 32b correspond to the size, thickness, material, weight, etc. of the first workpiece W1. Can be decided.
The adhesion drive unit 32d is configured by an actuator or the like that can reciprocate in the Z direction, and the control unit 6 described later of the first workpiece W1 carried into the variable pressure chamber B as shown by the solid line in FIG. The operation is controlled so that the adhesive portion 32b is brought into contact with the surface to be adhesively held. After bonding the first workpiece W1 and the second workpiece W2, as shown by the solid line in FIG. 3, the first workpiece holding surface 1a of the first holding member 1 is in contact with the surface of the first workpiece W1, The operation is controlled so that the adhesive portion 32b is separated from the surface of the first workpiece W1 in the Z direction.
Although not shown in the drawings as another example, the adhesive chuck 32 is not installed on the first work holding surface 1a of the first holding member 1, and an electrostatic chuck is installed in combination with the suction chuck 31 instead. It is also possible to install or change the adhesive chuck 32 or the electrostatic chuck on the second work holding surface 2a of the holding member 2 in combination with the suction chuck 31.

By the way, as the material of the first holding member 1 and the second holding member 2, precision processing is easy (excellent in workability), but is lightweight (excellent in workability) and inexpensive. Materials are commonly used.
On the other hand, glass, silicon, or the like that is harder than a metal material such as an aluminum-based material is generally used as the material of the first workpiece W1 and the second workpiece W2 that constitute a substrate such as an LCD or an OLED.
Therefore, when the first workpiece W1 and the second workpiece W2 are brought into contact with the first workpiece holding surface 1a of the first holding member 1 and the second workpiece holding surface 2a of the second holding member 2 and repeatedly attached and detached, The soft first workpiece holding surface 1a and the second workpiece holding surface 2a are gradually worn by friction generated each time they come into contact.
Further, as the material of the first holding member 1 and the second holding member 2, it is also conceivable to use a hard material such as ceramic that is harder than glass and hard to wear. However, in this case, if the first workpiece holding surface 1a and the second workpiece holding surface 2a are formed in a concavo-convex shape by blasting such as sand blasting, etching treatment or lapping, etc., only the crest tip of the convex portion is easily chipped. In addition, there is a possibility that the mountain-shaped tip of the convex portion may pierce when contacting the first workpiece W1 or the second workpiece W2. For this reason, it is disadvantageous in that it has inferior processing accuracy and workability (processing time and processing cost) of the concavo-convex shape as compared with metal materials, and breakage such as cracks occurs in the first workpiece W1 and the second workpiece W2. It was. In particular, in the case of a ceramic material, since a process such as firing is required, it is disadvantageous that it is difficult to increase the size.
Therefore, in order to simultaneously achieve such problems as wear prevention and workability, the first holding member is attached to the first work holding surface 1a of the first holding member 1 and the second work holding surface 2a of the second holding member 2. A hard coating layer 12 made of a material harder than that of the first and second holding members 2 and the pair of workpieces W1 and W2 is formed.

The hard coating layer 12 is laminated with a predetermined thickness by coating a material harder than the material of the pair of workpieces W1 and W2 along the first workpiece holding surface 1a and the second workpiece holding surface 2a. Furthermore, it is preferable that the hard coating layer 12 is grounded (grounded) via the first work holding surface 1a and the second work holding surface 2a.
As a specific example of the material of the hard coating layer 12, a ceramic containing a conductive material made of, for example, titanium, silicon carbide, tungsten, carbon particles, or the like that does not generate a nonconductor such as an oxide film on the surface of the hard coating layer 12. It is preferable to use a material made of glass or a metal matrix.
Specific examples of the coating method of the hard coating layer 12 include painting, dipping, vapor deposition, plating, sputtering, and thermal spraying.
1 to 4 as specific examples of the hard coating layer 12, the first work holding surface 1a partially formed in the first holding member 1 and the entire surface including the outer surface 1b thereof. On the other hand, a panel 12P having the hard coating layer 12 is detachably laid. Similarly, a panel 12P having a hard coating layer 12 is detachably laid on the entire surface including the second work holding surface 2a partially formed in the second holding member 2 and the outer surface 2b. ing.
The panel 12P is formed in a thin plate shape with a metal such as aluminum, and the hard coating layer 12 is integrally formed on the surface thereof. The shape of the panel 12P is formed in a rectangular shape or the like, and one panel 12P having substantially the same size as the first work holding surface 1a or the second work holding surface 2a is attached, or the first work holding surface 1a or the second work holding surface. A plurality of panels 12P smaller than the size of the surface 2a are attached so as to be arranged in the XY direction.
Although not shown as other examples, the hard coating layer 12 is partially formed only on the first work holding surface 1a from which the outer surface 1b is removed, or the second work holding surface 2a from which the outer surface 2b is removed. Only the hard coating layer 12 is partially formed, the hard coating layer 12 is formed only on one side of the first work holding surface 1a or the second work holding surface 2a, or the first without using the panel 12P. It is also possible to directly form or change the hard coating layer 12 along the surface of the one workpiece holding surface 1a or the second workpiece holding surface 2a.

Furthermore, the hard coating layer 12 has a plurality of supports that project from one or both of the first workpiece holding surface 1a and the second workpiece holding surface 2a toward one or both of the pair of workpieces W1 and W2 to make point contact. The projection 12a has a plurality of intake grooves 12b formed so as to communicate with the suction ports 31a of the suction chuck 31 between the plurality of support projections 12a.
The plurality of support protrusions 12a are provided so that their tips are brought into point contact with the surfaces of the first work W1 and the second work W2, respectively, so that the first work W1 and the second work W2 are in a smooth state. is there. For this reason, it is preferable to arrange and hold a large number of minute support protrusions 12a so as to be dense per unit area so that the point contact portions of the first work W1 and the second work W2 are not deformed by weight.
A plurality of intake grooves 12b are formed so that minute space portions 12s are dispersed between the first work W1 and the second work W2, and the contact area with the first work W1 and the second work W2 is narrow. It is comprised so that it may become.
As a method for ensuring smooth workpiece holding, the plurality of support projections 12a are preferably formed so as to protrude in a mountain shape toward one or both of the pair of workpieces W1, W2. The plurality of intake grooves 12b are preferably formed in a valley shape so as to be adjacent to the plurality of support protrusions 12a in the XY direction and the XYθ direction.

And either one or both of the 1st work holding surface 1a or the 2nd work holding surface 2a have a plurality of peak-like convex parts 12c and a plurality of valley-like concave parts 12d formed by roughening processing, It is preferable to laminate the hard coating layer 12 along the plurality of mountain-shaped convex portions 12c and the plurality of valley-shaped concave portions 12d. It is preferable that a plurality of mountain-shaped convex portions 12c and a plurality of valley-shaped concave portions 12d are arranged in a large number so as to be dense per unit area, like the support projections 12a and the intake grooves 12b.
As a result, a plurality of support protrusions 12a are formed on the outside of the plurality of mountain-shaped convex portions 12c, and a plurality of intake grooves 12b are formed on the outside of the plurality of valley-shaped recesses 12d.
Examples of the roughening process include a blasting process such as sandblasting, an etching process, and a lapping process.
In the case shown in FIGS. 1 to 4 as specific examples of the roughening treatment, the metal surface that becomes the surface of the panel 12P is roughened by blasting, and the hard coating layer 12 is laminated on the roughened surface. Yes. Specifically, a plurality of ridges 12c and a plurality of valleys are formed by applying particles such as ceramic, glass, metal, etc. having a particle size of about # 60 to # 240 to the metal surface that is the surface of panel 12P at high speed. The recess 12d is formed simultaneously with a predetermined surface roughness.
Although not shown in the drawings as other examples, the roughening process may be performed instead of the blasting process by an etching process or a lapping process, or the first work holding surface 1a or the second work holding surface 2a may be used without using the panel 12P. The surface can be directly roughened, and the hard coating layer 12 can be laminated or changed on the rough surface.

As the degree of the rough surface state by the roughening treatment described above, the surface roughness (Ra) is preferably about 0.1 to 3.0.
According to experiments, when the surface roughness (Ra) of the plurality of support protrusions 12a and the plurality of intake grooves 12b is less than 0.1, the height difference between the support protrusions 12a and the intake grooves 12b becomes too small, and the suction is reduced. The suction force from the suction port 31a of the chuck 31 is not easily spread to the plurality of intake grooves 12b. Therefore, it has been found that the first workpiece W1 and the second workpiece W2 cannot be stably sucked and held by the entire first workpiece holding surface 1a and the second workpiece holding surface 2a.
When the surface roughness (Ra) of the plurality of support protrusions 12a and the plurality of intake grooves 12b is larger than 3.0, the height difference between the support protrusions 12a and the intake grooves 12b becomes too large, and the suction chuck 31 The suction force from the suction port 31a flows more than necessary into the plurality of intake grooves 12b. In particular, as shown in the illustrated example, when the hard coating layer 12 is formed up to the outer surface 1b of the first work holding surface 1a and the outer surface 2b of the second work holding surface 2a, a large amount leaks to these

outer surfaces

1b and 2b. Too much. Therefore, it has been found that the first workpiece W1 and the second workpiece W2 cannot be stably sucked and held by the entire first workpiece holding surface 1a and the second workpiece holding surface 2a.

In order to demonstrate the improvement of the frictional force due to the point contact of the hard coating layer 12 described above, the following experiment was conducted.
A point contact plate having the hard coating layer 12 in which the support protrusions 12a and the intake grooves 12b described above are dispersed, a surface contact plate from which an aluminum smooth surface is exposed, and a glass block placed thereon, Prepared. The point contact plate and the contact portion of the block, and the contact portion of the surface contact plate and the block are each evacuated, and then subjected to a friction measurement test (block-on-plate) while returning to atmospheric pressure. It was.
As a result of the friction measurement test, the friction force of the point contact plate is “0.090 Kg”, the friction force of the surface contact plate is “0.193 Kg”, and the friction coefficient of the point contact plate is that of the surface contact plate. The coefficient of friction was about ½. Thus, it was found that the point contact plate can halve the frictional force than the surface contact plate.

The contact / separation drive unit 4 includes an actuator that reciprocates one or both of the first holding member 1 and the second holding member 2 in the Z direction, and the operation is controlled by a control unit 6 described later. . As an example of control of the drive unit 4 for contact / separation by the control unit 6, as shown by the solid line in FIG. 1, when the first workpiece W 1 and the second workpiece W 2 carried into the variable pressure chamber B are delivered, The drive unit 4 moves either the first holding member 1 or the second holding member 2 relatively apart from the other in the Z direction, or both the first holding member 1 and the second holding member 2 are mutually moved. It is moved relatively apart in the Z direction. After that, as shown in the two-dot chain line in FIG. 1 and FIG. 2, the contact / separation drive unit 4 moves in the Z direction with one of the first holding member 1 side and the second holding member 2 side facing the other. The first workpiece W1 and the second workpiece W2 are moved in the Z direction with the sealing material W3 interposed therebetween by moving the first holding member 1 side and the second holding member 2 side closer to each other in the Z direction. If necessary, further pressurize and bond.
As a specific example of the contact / separation drive unit 4, in the example shown in FIGS. 1 to 4, only the first holding member 1 is linked to the contact / separation drive unit 4 so that the first holding member 1 side is connected. It is relatively moved in the Z direction toward the second holding member 2 side.
Although not shown as another example, only the second holding member 2 is linked to the contact / separation driving unit 4 so that the second holding member 2 side is relatively close to the first holding member 1 side in the Z direction. The first holding member 1 and the second holding member 2 are respectively linked to the contact / separation driving unit 4 so that the first holding member 1 side and the second holding member 2 side simultaneously approach each other in the Z direction. It can also be moved and changed.

The alignment drive unit 5 includes an actuator that adjusts and moves one or both of the first holding member 1 and the second holding member 2 in the XY direction and the XYθ direction. The operation is controlled by the control unit 6 described later. ing. As an example of the control of the alignment drive unit 5 by the control unit 6, as shown in FIG. 2, the alignment drive unit immediately before the first work W1 and the second work W2 carried into the variable pressure chamber B are bonded together. 5 adjusts the relative movement of either the first holding member 1 or the second holding member 2 in the XY direction or the XYθ direction from the other to align the first workpiece W1 and the second workpiece W2, Alternatively, both the first holding member 1 and the second holding member 2 are adjusted and moved relative to each other in the XY direction and the XYθ direction to align the first workpiece W1 and the second workpiece W2.
As a specific example of the alignment drive unit 5, in the example shown in FIGS. 1 to 4, only the first holding member 1 is linked to the alignment drive unit 5, and the first holding member 1 side is connected to the second holding unit 1 side. It is relatively adjusted and moved in the XYθ direction toward the holding member 2 side.
Although not shown in the drawings as another example, only the second holding member 2 is linked to the alignment drive unit 5 so that the second holding member 2 side is directed toward the first holding member 1 side and is relative to the XY direction or the XYθ direction. The first holding member 1 side and the second holding member 2 side at the same time by adjusting and moving the position and aligning the first holding member 1 and the second holding member 2 with the alignment drive unit 5 respectively. It is also possible to align or change by relatively moving in the XY direction or XYθ direction.

The control unit 6 not only electrically connects the suction source 31c of the suction chuck 31, the adhesion drive unit 32d of the adhesion chuck 32, the contact / separation drive unit 4, the alignment drive unit 5, and the like. An opening / closing part (not shown) for taking in and out the first work W1 and the second work W2 inside and outside, and a chamber pressure adjusting means (not shown) for adjusting the inside of the variable pressure chamber B from the atmospheric atmosphere AP to the reduced pressure atmosphere DP having a predetermined degree of vacuum. It is a controller that is electrically connected to the
The controller serving as the controller 6 sequentially controls the operation at a preset timing in accordance with a preset program in its control circuit (not shown).

Specifically, as shown by the solid line in FIG. 1, the control unit 6 uses the suction chuck 31 and the adhesive chuck 32 to transfer the first work W1 carried into the variable pressure chamber B of the atmospheric atmosphere AP to the first holding member 1. The first workpiece holding surface 1a is received and the second workpiece W2 is controlled to be received by the suction chuck 31 on the second workpiece holding surface 2a of the second holding member 2.
After that, after the inside of the variable pressure chamber B is switched to the reduced pressure atmosphere DP, as shown in the two-dot chain line in FIG. 1 and FIG. 2, the adhesion drive unit 32 d and the contact separation drive unit 4 of the adhesion chuck 32 By moving the first holding member 1 and the adhesive portion 32b closer to the second holding member 2 in the Z direction, the first workpiece W1 and the second workpiece W2 are overlapped in the Z direction with the sealing material W3 interposed therebetween. The operation is controlled.
At substantially the same time as this superposition, the alignment drive unit 5 adjusts and moves either the first holding member 1 or the second holding member 2 in the XY direction or the XYθ direction with respect to the other, so that the first workpiece W1 and the second workpiece 2 The relative alignment (alignment) of the workpiece W2 is performed with high accuracy. After completion of the alignment, the contact / separation drive unit 4 controls the operation so that the first workpiece W1 and the second workpiece W2 are bonded together.
Further, after the first workpiece W1 and the second workpiece W2 are bonded, the first workpiece holding surface 1a of the first holding member 1 is moved by the contact / separation drive unit 4 as shown by the solid line in FIG. The state of contact with the surface of W1 is maintained, and the operation is controlled such that the adhesive drive part 32d of the adhesive chuck 32 moves the adhesive part 32b away from the first workpiece W1 and peels it off.

According to the manufacturing apparatus A of the bonding device W which concerns on such embodiment of this invention, it forms in the 1st workpiece | work holding surface 1a of the 1st holding member 1, and the 2nd workpiece holding surface 2a of the 2nd holding member 2. Even if the work (first work W1, second work W2) is repeatedly brought into contact with the hard coating layer 12 and the work (first work W1, second work W2) is held to be smooth, the work A plurality of support protrusions 12a projecting in a mountain shape toward (first workpiece W1, second workpiece W2) are in point contact with the workpiece (first workpiece W1, second workpiece W2), and the contact area is extremely small. Therefore, there is little restraining force by friction with a work (the 1st work W1 and the 2nd work W2).
In addition to this, the plurality of support protrusions 12a are harder than the first holding member 1, the second holding member 2, and the workpiece (first workpiece W1, second workpiece W2), and therefore do not wear with time.
As a result, even if the first holding member 1 and the second holding member 2 are formed of a metal material excellent in processing accuracy, workability, etc., only the distal end portion of the support projection 12a is smoothed without being worn down over a long period of time. The workpiece (first workpiece W1, second workpiece W2) can be point-contacted and held with high accuracy.
Accordingly, the first work holding surface 1a and the second work over time are minimized while minimizing the contact area of the first work holding surface 1a and the second work holding surface 2a with respect to the work (first work W1, second work W2). Wear of the holding surface 2a can be prevented.
As a result, the highly accurate bonding device W with submicron accuracy can be continuously manufactured over a long period of time.

In particular, either one or both of the first workpiece holding surface 1a and the second workpiece holding surface 2a have a plurality of roughened ridges 12c on the outside of the plurality of ridges 12c. It is preferable that the plurality of support protrusions 12a are laminated by coating.
In this case, the surface tension of the coating material can be increased by coating the outside of the plurality of mountain-shaped projections 12c even if the tips of the plurality of mountain-shaped projections 12c are sharpened by roughening. The mountain-shaped tips of the plurality of support protrusions 12a are spherical.
Therefore, it is possible to simultaneously prevent the occurrence of partial distortion of the workpiece and the piercing of the plurality of support projections 12a at the time of contact with the workpiece (first workpiece W1, second workpiece W2).
As a result, it is possible to suppress distortion when the workpieces W1 and W2 are held on the first workpiece holding surface 1a and the second workpiece holding surface 2a, and the workpieces (first workpiece W1 and second workpiece W2) are cracked. No damage will occur. For this reason, it is extremely effective especially for the thin thickness (first workpiece W1, second workpiece W2).

Further, either one or both of the first workpiece holding surface 1a and the second workpiece holding surface 2a includes a suction port 31a that sucks and holds one or both of the pair of workpieces (W1, W2), and is hard. The covering layer 12 preferably has a plurality of intake grooves 12b formed in a valley shape so as to communicate with the suction port 31a between the plurality of support protrusions 12a.
In this case, even if the work (first work W1, second work W2) is repeatedly brought into contact with the hard coating layer 12, the intake groove 12b does not disappear over a long period of time. For this reason, the suction force from the suction port 31a spreads over the entire first work holding surface 1a and the second work holding surface 2a, and the work (first work W1, second work W2) is reliably sucked and held. .
Further, when the workpieces (first workpiece W1, second workpiece W2) are peeled from the first workpiece holding surface 1a of the first holding member 1 or the second workpiece holding surface 2a of the second holding member 2, a plurality of support protrusions 12a are used. Since the plurality of intake grooves 12b formed between the two do not adhere to the work (first work W1, second work W2), they are smoothly peeled off and hardly generate static electricity due to the peeling.
Therefore, partial distortion of the workpieces W1 and W2 due to suction holding can be reliably prevented.
As a result, the workpieces W1 and W2 are placed on the first workpiece holding surface 1a and the second workpiece holding surface 2a as compared to the conventional one in which a part of the substrate is bent and deformed toward the suction port when the suction is held. The distortion at the time of holding | maintenance can be suppressed and it can bond in the surface in a uniform state especially also to the bonding for which submicron precision is requested | required. Therefore, the highly accurate bonding device W can be manufactured.
Compared to conventional products that are charged by generating static electricity when the substrate is peeled off, it is possible to bond a pair of workpieces W1 and W2 in a parallel state over a long period of time, and the effect of peeling charging is ensured. Can be prevented. As a result, it is possible to stably perform high-accuracy bonding over a long period of time, and to reliably prevent changes in characteristics due to static electricity as well as destruction of the bonding device W and circuit breakage.

In particular, the plurality of intake grooves 12b are preferably arranged close to each other so as to be adjacent to the plurality of support protrusions 12a.
In this case, the support protrusions 12a and the intake grooves 12b are arranged with high density per unit area over the entire surface of the hard coating layer 12.
Therefore, the workpieces (first workpiece W1, second workpiece W2) can be held more smoothly.
As a result, it is possible to further improve the bonding accuracy of the workpieces (first workpiece W1, second workpiece W2).

Furthermore, either one or both of the first workpiece holding surface 1a and the second workpiece holding surface 2a have a plurality of roughened valley-shaped recesses 12d, and a plurality of outer sides of the plurality of valley-shaped recesses 12d. It is preferable that the intake grooves 12b are laminated by coating.
In this case, by roughening the first workpiece holding surface 1a and the second workpiece holding surface 2a as pre-processing, a plurality of mountain-shaped convex portions 12c and a plurality of valley-shaped concave portions 12d are formed simultaneously, A plurality of support protrusions 12a and intake grooves 12b are formed simultaneously by laminating the hard coating layer 12 as a post-treatment on the outside.
Therefore, a large number of minute mountain-shaped convex portions 12c and valley-shaped concave portions 12d can be formed substantially uniformly by a simple process.
As a result, the mountain-shaped convex portion 12c and the valley-shaped concave portion 12d can be precisely formed in a short time and at a low cost.

Further, the surface roughness (Ra) of the plurality of support projections 12a formed on the outside of the plurality of mountain-shaped convex portions 12c and the plurality of intake grooves 12b formed on the outside of the plurality of valley-shaped recesses 12d. It is preferable to roughen the surface to be about 0.1 to 3.0.
In this case, the difference in height between the support projection 12a and the suction groove 12b spreads the suction force from the suction port 31a of the suction chuck 31 to each of the plurality of suction grooves 12b, so that the first work holding surface 1a or the second work holding surface 1a or The first workpiece W1 and the second workpiece W2 can be stably sucked and held by the entire workpiece holding surface 2a.

Furthermore, the hard coating layer 12 is grounded (grounded) via the first work holding surface 1a and the second work holding surface 2a, and the material of the hard coating layer 12 is an oxide film on the surface of the hard coating layer 12. It is preferable to use a material containing a conductive material that does not cause a non-conductor such as.
In this case, most of the electric charges present on the surfaces of the first workpiece W1 and the second workpiece W2 when they are carried into the variable pressure chamber B are brought into contact with the hard coating layer 12 so that the first workpiece holding surface 1a and the first workpiece It can escape through the two-work holding surface 2a.
In addition, since the plurality of support protrusions 12a are in point contact with the first workpiece W1 and the second workpiece W2 and the contact area is extremely small, peeling electrification hardly occurs.
Thereby, generation | occurrence | production of static electricity can be prevented completely substantially.

Furthermore, it is preferable that the panel 12P which has the hard coating layer 12 is attached to either one or both of the 1st workpiece holding surface 1a or the 2nd workpiece holding surface 2a.
In this case, by attaching the panel 12P to the first work holding surface 1a and the second work holding surface 2a, a precise uneven structure composed of a plurality of support protrusions 12a and a plurality of intake grooves 12b is integrally assembled. It is done.
Therefore, the plurality of support protrusions 12a and the plurality of intake grooves 12b can be easily installed by a simple attachment process.
As a result, the assembly accuracy can be improved.

Next, an embodiment of the present invention will be described with reference to the drawings.
In this embodiment, as shown in FIGS. 1 to 4, the second holding member 2 peels off the pair of workpieces W1 and W2 that have been bonded, that is, the bonding device W from the second workpiece holding surface 2a. 7.
In the example shown in FIGS. 1 to 4, the second workpiece W2 is pushed away from the second workpiece holding surface 2a by pressing with the peeling member 7.

The peeling member 7 passes through the through hole 2h opened in the second holding member 2, and a plurality of lift pins 7a provided so as to be reciprocally movable in the Z direction so as to face the surface of the second workpiece W2 in the Z direction; It has a peeling follower 7b provided across the base ends of the plurality of lift pins 7a, and a peeling drive 7c linked to the peeling follower 7b.
The lift pins 7a are arranged so as to be distributed in the XY direction with respect to the second work holding surface 2a, and the number and interval of the lift pins 7a depend on the size, thickness, material, weight of the bonding device W, etc. of the second work W2. Decided correspondingly.
The peeling drive unit 7c is composed of an actuator that can reciprocate in the Z direction, and receives the second workpiece W2 carried into the variable pressure chamber B by the control unit 6 as shown in FIGS. From the time until the first work W1 and the second work W2 are bonded, the operation is controlled so that the tip of the lift pin 7a is immersed in the through hole 2h. After bonding the first workpiece W1 and the second workpiece W2, as shown in FIG. 4, the tip of the lift pin 7a protrudes from the through hole 2h toward the surface of the second workpiece W2, and the second workpiece holding surface The operation is controlled so that the second workpiece W2 is peeled off from 2a.
Moreover, it is preferable to provide a workpiece holding chuck portion (not shown) at the tip of the lift pin 7a.

According to the manufacturing apparatus A of the bonding device W according to the embodiment of the present invention, between the workpiece (second workpiece W2) and the second holding member 2 (a large number of minute space portions 12s). Since an air layer is generated, adhesion between the work (second work W2) and the second holding member 2 due to a pressure difference is lost. At the same time, the contact area between the workpiece (second workpiece W2) and the second holding member 2 is extremely small due to the plurality of intake grooves 12b. Thereby, even if it peels off a pair of workpiece | work (1st workpiece | work W1, 2nd workpiece | work W2) which completed bonding, ie, the bonding device W, from the 2nd workpiece holding surface 2a of the 2nd holding member 2 with the peeling member 7. Since the interface between the workpiece (second workpiece W2) and the second workpiece holding surface 2a does not stick, the pressing portion of the bonding device W peels off smoothly without warping and deformation.
Therefore, the pair of workpieces (bonding device W) bonded together can be peeled without being warped and deformed by the peeling member 7 to prevent a change in alignment accuracy.
As a result, even when a high-definition liquid crystal display or organic EL display is used, the unevenness and light caused by misalignment is higher than that of a conventional display that tends to cause partial warping when a pair of bonded substrates are separated by lift pins. There is an advantage that partial defects such as omission can be prevented and the yield can be improved.

In the embodiment described above, as specific examples of the holding chuck 3, suction chucks 31 are installed on the first work holding surface 1 a of the first holding member 1 and the second work holding surface 2 a of the second holding member 2, respectively. However, the present invention is not limited to this, and the suction chuck 31 may not be installed on the first workpiece holding surface 1a and the second workpiece holding surface 2a, but an adhesive chuck 32, an electrostatic chuck, or the like may be installed.
Furthermore, in the previous embodiment, the pair of workpieces W1 and W2 that have been bonded together were peeled off from the second workpiece holding surface 2a by the peeling member 7 included in the second holding member 2, but this is not a limitation. The pair of workpieces W1 and W2 that have been pasted together may be peeled off from the second workpiece holding surface 2a by a peeling means provided regardless of the second holding member 2.

DESCRIPTION OF SYMBOLS 1 Manufacturing apparatus of a bonding device 1 1st holding member 1a 1st workpiece holding surface 2 2nd holding member 2a 2nd workpiece holding surface 31a Suction port 12 Hard coating layer

12a Bearing protrusion

12b Intake groove 12c Mountain-shaped convex part 12d Valley shape Recess 12P Panel 7 Peeling member W Pasting device W1 Workpiece (first work piece)
W2 work (second work)

Claims

A pair of workpieces are held by the first holding member and the second holding member, respectively, and the pair of workpieces are aligned and bonded together by relative movement of the first holding member and the second holding member. A device manufacturing apparatus,
Either one or both of the first workpiece holding surface of the first holding member and the second workpiece holding surface of the second holding member are opposed to one or both of the pair of workpieces and the first holding member. , Comprising a hard coating layer whose surface is formed in an uneven shape with a material harder than the material of the second holding member and the pair of workpieces,
The hard coating layer protrudes from one or both of the first workpiece holding surface and the second workpiece holding surface toward one or both of the pair of workpieces, An apparatus for manufacturing a bonding device, comprising: a plurality of support protrusions each in point contact with one smooth surface or both smooth surfaces.
Either one or both of the first workpiece holding surface and the second workpiece holding surface have a plurality of roughened convex portions, and the plurality of convex portions are outside the plurality of convex portions. The apparatus for manufacturing a bonding device according to claim 1, wherein the support protrusions are laminated by coating.
Either one or both of the first workpiece holding surface and the second workpiece holding surface includes a suction port that sucks and holds one or both of the pair of workpieces,
The bonding device according to claim 1, wherein the hard coating layer has a plurality of intake grooves formed in a valley shape so as to communicate with the suction port between the plurality of support protrusions. Manufacturing equipment.
Either one or both of the first workpiece holding surface and the second workpiece holding surface have a plurality of roughened valley-shaped recesses, and the plurality of intake grooves outside the plurality of valley-shaped recesses. The laminated device manufacturing apparatus according to claim 3, wherein the layers are laminated by coating.
The panel which has the said hard coating layer is attached to any one or both of said 1st workpiece holding surface or said 2nd workpiece holding surface, The manufacturing apparatus of the bonding device of Claim 3 or 4 characterized by the above-mentioned. .
The apparatus for manufacturing a bonding device according to claim 3 or 4, wherein the second holding member has a peeling member that peels the pair of workpieces that have been bonded together from the second workpiece holding surface.