WO2002035613A1 - Module a semi-conducteur emetteur ou recepteur de lumiere et procede de fabrication dudit module - Google Patents
Module a semi-conducteur emetteur ou recepteur de lumiere et procede de fabrication dudit module Download PDFInfo
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- WO2002035613A1 WO2002035613A1 PCT/JP2000/007360 JP0007360W WO0235613A1 WO 2002035613 A1 WO2002035613 A1 WO 2002035613A1 JP 0007360 W JP0007360 W JP 0007360W WO 0235613 A1 WO0235613 A1 WO 0235613A1
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- Prior art keywords
- light
- semiconductor
- emitting
- semiconductor devices
- semiconductor module
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Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F55/00—Radiation-sensitive semiconductor devices covered by groups H10F10/00, H10F19/00 or H10F30/00 being structurally associated with electric light sources and electrically or optically coupled thereto
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/81—Bodies
- H10H20/819—Bodies characterised by their shape, e.g. curved or truncated substrates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of semiconductor or other solid state devices
- H01L25/03—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/075—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H10H20/00
- H01L25/0753—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H10H20/00 the devices being arranged next to each other
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
- H10F19/90—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers
- H10F19/902—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers for series or parallel connection of photovoltaic cells
- H10F19/904—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers for series or parallel connection of photovoltaic cells characterised by the shapes of the structures
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/10—Semiconductor bodies
- H10F77/14—Shape of semiconductor bodies; Shapes, relative sizes or dispositions of semiconductor regions within semiconductor bodies
- H10F77/147—Shapes of bodies
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/93—Interconnections
- H10F77/933—Interconnections for devices having potential barriers
- H10F77/935—Interconnections for devices having potential barriers for photovoltaic devices or modules
- H10F77/937—Busbar structures for modules
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/81—Bodies
- H10H20/819—Bodies characterised by their shape, e.g. curved or truncated substrates
- H10H20/821—Bodies characterised by their shape, e.g. curved or truncated substrates of the light-emitting regions, e.g. non-planar junctions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Definitions
- the present invention relates to a light emitting or light receiving module incorporating a plurality of granular semiconductor devices and a method for manufacturing the same.
- the light-emitting or light-receiving semiconductor module is applicable to various uses such as a solar cell panel, a lighting panel, a display, and a semiconductor photocatalyst. Background art
- a Pn junction is formed on the surface of a small-diameter spherical semiconductor element made of a p-type or n-type semiconductor via a diffusion layer, and these many spherical semiconductor elements are connected in parallel to a common electrode. Technologies for utilizing solar cells and semiconductor photocatalysts are being studied.
- U.S. Pat. No. 3,998,659 discloses that a p-type diffusion layer is formed on the surface of an n-type spherical semiconductor, and a number of spherical semiconductor diffusion layers are formed into a common film-like electrode (positive electrode).
- An example is disclosed in which a solar cell is constructed by connecting a large number of spherical semiconductor n-type cores to a common film-shaped electrode (negative electrode).
- U.S. Pat. No. 4,021,332 proposes that a p-type spherical semiconductor element and an n-type spherical semiconductor element are arranged in a matrix and the semiconductors are connected to a common film-shaped electrode.
- a solar energy converter semiconductor module
- US Pat. Nos. 4,100,051 and 4,136,436 also disclose solar energy converters substantially similar to the above.
- the inventor of the present invention has proposed a spherical semiconductor composed of a P-type semiconductor and an n-type semiconductor, as shown in W098Z15983 and W0999Z10935.
- a granular light emitting or receiving semiconductor device in which a diffusion layer, a pn junction, and a pair of electrodes are formed on an element, and connect a large number of such semiconductor devices in series or connect a plurality of series connected bodies in parallel.
- the spherical semiconductor device having the positive and negative electrodes proposed by the present inventor in the above-mentioned publication is difficult to handle because it is easy to roll, and the position for forming the positive and negative electrodes is determined. It is not easy to identify the electrodes.
- An object of the present invention is to provide a light emitting or light receiving semiconductor module capable of minimizing a decrease in output voltage or current even if any of the inventive devices fails, and a method of manufacturing the same.
- Light can be guided to a position distant from the point of incidence or light-emitting through the reflection of the light-transmitting member
- Another object of the present invention is to provide a light emitting or light receiving semiconductor module and a method of manufacturing the same. Disclosure of the invention
- the light-emitting or light-receiving semiconductor module of the present invention is a plurality of granular semiconductor devices having a light-emitting or light-receiving function, wherein the plurality of semiconductor devices are arranged in a plurality of rows and a plurality of columns in a state where conductive directions are aligned. And a conductive connection mechanism for electrically connecting the plurality of semiconductor devices in each column in series and electrically connecting the plurality of semiconductor devices in each row electrically in parallel (Claim 1). ).
- the conductive connection mechanism includes a plurality of leads made of a thin metal plate. And a light transmitting member that covers all of the semiconductor devices in a buried state (Claim 3).
- the semiconductor device is a solar cell (Item 4), or the semiconductor device is a spherical semiconductor device (Item 5), or the semiconductor device is a circle. It is a columnar semiconductor device (Section 6).
- the semiconductor device is a substantially spherical semiconductor element made of a p-type or n-type semiconductor, and the first and second semiconductor elements are parallel to a pair of apexes on both sides of the center.
- first and second electrodes respectively provided on the first and second flat surfaces and connected to both ends of the pn junction (Section 7).
- the semiconductor device is a columnar semiconductor element made of a p-type or n-type semiconductor, and a pair of first and second parallel ends orthogonal to an axis.
- a semiconductor element having a second flat surface, a diffusion layer formed in a surface layer of the semiconductor element including the first flat surface, and a pn junction formed through the diffusion layer;
- an average diameter of the first and second flat surfaces is preferably smaller than a distance between the two flat surfaces (Section 9). Are formed with different diameters (Section 10).
- the semiconductor module according to paragraph 7 or 8 is preferably configured as follows.
- the semiconductor element is made of a silicon semiconductor (Item 11).
- the semiconductor element includes gallium arsenide (GaAs), indium arsenide (InP), gallium arsenide (GaP), gallium nitride (Gan), indium selenide 'copper (Inn). C u Se) (compound 12).
- the semiconductor element is composed of a P-type semiconductor, the diffusion layer is composed of an n-type diffusion layer, a p-type diffusion layer is formed on the second flat surface, and a second is formed on a surface of the p-type diffusion layer. Electrodes provided (Section 13).
- the semiconductor element is composed of an n-type semiconductor
- the diffusion layer is composed of a P-type diffusion layer
- an n-type diffusion layer is formed on the second flat surface
- a second electrode is formed on a surface of the n-type diffusion layer.
- Another semiconductor module for light-emitting or light-receiving according to the present invention is a plurality of granular semiconductor devices having a light-emitting or light-receiving function, which are divided into a plurality of rows in a state where conductive directions are aligned and are arranged at appropriate intervals in a circumferential direction.
- a mechanism (Section 15).
- a cylindrical light transmitting member made of a transparent synthetic resin is provided, and a plurality of rows of semiconductor devices arranged in a ring shape are embedded in a peripheral wall of the light transmitting member ( Section 16).
- an irregular reflection surface for irregularly reflecting light is formed on the inner peripheral surface of the peripheral wall of the light transmitting member (Item 17 subordinate to Item 16).
- the method of manufacturing a light-emitting or light-receiving semiconductor module according to the present invention includes a first step of preparing a plurality of lead frames made of a thin metal plate, a plurality of granular semiconductor devices having a light-emitting or light-receiving function, and the plurality of leads.
- a plurality of semiconductor devices are assembled between frames with their conductive directions aligned, and these semiconductor devices are arranged in a matrix of multiple rows and multiple columns, and the semiconductor devices in each column are connected in series via a lead frame.
- a second step of connecting the semiconductor devices in each row in parallel via a lead frame and a third step of embedding the plurality of semiconductor devices arranged in a matrix in a light transmitting member made of a transparent synthetic resin. It is characterized by having (paragraph 18).
- partial cylindrical lens portions are formed on both sides of each row of the semiconductor devices (Item 19).
- Another method of manufacturing a semiconductor module for light emission or light reception includes a first step of preparing a plurality of ring-shaped lead frames made of a thin metal plate, and a plurality of granular semiconductor devices having a light emission or light reception function.
- a plurality of semiconductor devices are incorporated between the plurality of lead frames in a state where conductive directions are aligned, divided into a plurality of rows, and suitable in a circumferential direction.
- a plurality of semiconductor devices in each row are connected in series via a lead frame, and a plurality of semiconductor devices in each ring are connected in parallel via a lead frame.
- FIG. 1 to 16 are diagrams showing a first embodiment
- FIG. 1 is a cross-sectional view of a spherical semiconductor device
- FIG. 2 is a cross-sectional view of a semiconductor device on which a first flat surface is formed
- FIG. FIG. 4 is a cross-sectional view of a semiconductor device in which a diffusion layer and a pn junction are formed
- FIG. 4 is a cross-sectional view of a semiconductor device in which a second flat surface is formed
- FIG. 5 is a cross-section of a semiconductor device in which a diffusion layer is formed.
- FIG. 6 is a sectional view of the semiconductor device.
- FIG. 7 is a plan view of a lead frame plate
- FIG. 8 is a longitudinal sectional side view of an assembly combining a semiconductor device and a lead frame plate
- FIG. 9 is an enlarged cross-sectional view of the semiconductor device and a lead frame.
- Fig. 10 is a plan view of three sets of the semiconductor module and the lead frame plate
- Fig. 11 is a longitudinal section of the semiconductor module and the lead frame plate
- Fig. 12 is a longitudinal section of the semiconductor module and the lead frame plate.
- FIG. 13 is a plan view of the semiconductor module
- FIG. 14 is a longitudinal sectional view of the semiconductor module
- FIG. 15 is a side view of the semiconductor module
- FIG. 16 is a side view of the semiconductor module. It is a figure of an equivalent circuit.
- FIG. 17 is a cross-sectional view of a semiconductor device according to the first modification.
- FIG. 18 to FIG. 21 are diagrams showing Modification 2
- FIG. 18 is a cross-sectional view of a semiconductor device having first and second flat surfaces formed
- FIG. FIG. 20 is a sectional view of a semiconductor device
- FIG. 20 is a sectional view of a semiconductor device provided with a negative electrode
- FIG. 21 is a sectional view of a semiconductor device.
- FIGS. 22 to 30 are views showing Modification 3, FIG. 22 is a view showing a columnar semiconductor material and a semiconductor element, and FIG. 23 is a cross-sectional view taken along line XXI II—XXI II in FIG.
- FIG. 24 is a cross-sectional view of a semiconductor device in which a diffusion layer is formed
- FIG. FIG. 26 is a cross-sectional view of a semiconductor device in which another diffusion layer is formed
- FIG. 27 is a cross-sectional view of a semiconductor device
- FIG. 28 is a cross-sectional view of a semiconductor module.
- FIG. 29 is a cross-sectional view taken along the line XXVI III-XXVI III of FIG. 28, and
- FIG. 30 is an enlarged cross-sectional view of a main part of the semiconductor device and the lead frame.
- FIG. 31 to FIG. 34 are views showing Modification 4 and are plan views of the assembled body during the manufacture of the semiconductor module
- FIG. 32 is a front view of the assembled body. Is a plan view of the semiconductor module
- FIG. 34 is a cross-sectional view of the semiconductor module.
- FIG. 1 to 6 show a method for manufacturing a light-receiving semiconductor device 10 suitable for a solar cell
- FIG. 6 is a cross-sectional view of the light-receiving semiconductor device 10.
- the light-receiving semiconductor device 10 includes, for example, a semiconductor element 1 made of a p-type semiconductor, an n-type diffusion layer 3, a pn junction 4, and a pair of electrodes 9a and 9b (negative electrodes).
- An electrode 9a, a positive electrode 9b), a diffusion layer 8 made of ap + type semiconductor, and an antireflection film 6a are provided.
- the semiconductor element 1 is manufactured from a spherical semiconductor element 1a (for example, 1.5 mm in diameter) made of p-type silicon single crystal (see FIG. 1).
- Parallel first and second flat surfaces 2 and 7 are formed on a pair of apexes on both sides of the center of the semiconductor element 1.
- the first flat surface 2 has a diameter of, for example, 0.6 mm
- the second flat surface 7 has, for example, a diameter of 0.8 mm.
- the average diameter of the first and second flat surfaces 2, 7 is smaller than the distance between the two flat surfaces 2, 7.
- the diffusion layer 3 is formed on the surface of the semiconductor device 1 including the first flat surface 2, the n-type diffusion layer 3 is not formed on the second flat surface 7, and the other diffusion layer 8 is formed on the second flat surface 7. It is formed.
- the diffusion layer 3 is an n + -type diffusion layer having a thickness of 0.4 to 0.5 ⁇ m in which phosphorus is diffused.
- a substantially spherical pn junction 4 (correctly, a pn + junction) is formed via the diffusion layer 3.
- a thin-film A first electrode 9 a is provided, and a second electrode 9 b in the form of a thin film obtained by firing a silver paste is provided on the surface of the p + -type diffusion layer 8 on the second flat surface 7.
- the anti-reflection film 6 a made of the silicon oxide film 6 is formed on the surface of the diffusion layer 3 except for the first and second flat surfaces 2 and 7.
- the substantially spherical pn junction 4 has a photoelectric conversion function, and receives sunlight to perform photoelectric conversion to generate an electromotive force of about 0.6 port. Since the thin-film negative electrode 9a and the positive electrode 9b were formed on the first and second flat surfaces 2, 7, the semiconductor device 10 was hard to roll, and was easy to hold and handle. Since the first and second flat surfaces 2 and 7 have different sizes, the negative electrode 9a and the positive electrode 9b can be easily distinguished visually by a sensor. The work efficiency when assembling the device 10 into a semiconductor module can be improved. .
- a spherical semiconductor device 1a having a diameter of 1.5 mm and a p-type silicon single crystal having a resistivity of about 1 ⁇ is manufactured.
- Such a spherical semiconductor element 1a is manufactured by the method proposed by the present inventor in Japanese Patent Application Laid-Open No. 10-33969 or International Publication WO98 / 15983. Can be.
- a drop tube is used, and silicon particles as a raw material are melted inside the upper end side of the drop tube and fall freely while solidifying while maintaining the true spherical shape by the action of surface tension. Fabricate a silicon single crystal.
- a spherical semiconductor can be produced by mechanical polishing or the like.
- a part of the surface of the spherical semiconductor element 1a is processed by a mechanical and chemical polishing method to form a first flat surface 2 having a diameter of about 0.6 mm.
- phosphorus is diffused over the entire surface by a known method to form an n + -type diffusion layer 3 and is located at a depth of about 0.4 to 0.5 from the surface of the spherical semiconductor 1.
- An approximately spherical Pn junction 4 is formed.
- the silicon oxide film 5 on the surface generated in the step of diffusing phosphorus is once removed by etching, and heated again in an oxygen atmosphere to form a silicon oxide film 6 (antireflection film 6a).
- the second flat surface of the second flat surface having a diameter of about 0.8 mm and exposed to p-type silicon single crystal is mechanically and chemically polished on the side opposite to the first flat surface 2.
- the flat surface 7 is formed.
- the first and second flat surfaces 2, 7 are formed in parallel on a pair of apexes on both sides of the center of the sphere.
- the diameter of the second flat surface 7 is formed so as to be different from the diameter of the first flat surface 2 so that the negative electrode 9a and the positive electrode 9b can be easily distinguished in a lead frame connecting step described later. I do.
- the p-type exposed on the second flat surface 7 is masked with the silicon oxide film 6.
- Form A porous layer is diffused on the surface of a silicon single crystal by a known method to provide a p + -type diffusion layer 8 having a thickness of 0.2 to 0.3 ⁇ m.
- the boron diffuses into the p-type layer of the second flat surface 7 and the p + n + junction 8a that contacts the n + -type diffusion layer 3 at the edge of the second flat surface 7 is formed by the silicon oxide film 6. It is formed inside and the surface of the p + n + junction 8a is protected by the silicon oxide film 6.
- a silver paste is provided on the surface of the diffusion layer 3 on the first flat surface 2 and the surface of the diffusion layer 8 on the second flat surface 7, respectively, and the silver paste is placed in an oxidizing atmosphere. And baked in the temperature range of 600 to 800 ° C.
- the negative electrode 9 a and the positive electrode 9 connected to both ends of the pn junction 4 are connected to the diffusion layer 3 and the p + -type diffusion layer 8 with low resistance respectively.
- a continuous negative electrode 9a and positive electrode 9b are formed.
- n + type diffusion layer 3, etching, electrode formation, antireflection film formation, and the like are techniques that can be selected from known methods.
- the materials are not limited to those described above, and may be made of other materials conventionally used.
- a known anti-reflection film such as a titanium oxide film other than the silicon oxide film described above may be used.
- the light receiving semiconductor module 20 is, for example, 25 semiconductor devices 10 and a conductive connection mechanism for electrically connecting the 25 semiconductor devices 10 and includes six lead frames 29. It includes a conductive connection mechanism, a light transmitting member 31, a positive terminal 33 and a negative terminal 34.
- the 25 granular semiconductor devices 10 are arranged in a plurality of rows and a plurality of columns (in this embodiment, 5 rows and 5 columns) in a state where the conductive directions are aligned, and a plurality of semiconductor devices in each column are arranged by a conductive connection mechanism. 10 are electrically connected in series, and a plurality of semiconductor devices 10 in each row are electrically connected in parallel.
- the conductive connection mechanism is composed of six metal lead frames 29, and the lead frames 29 are mounted between the semiconductor devices 10 in each row and the semiconductor devices 10 in the adjacent rows, and the electrodes on both sides are mounted.
- the partial cylindrical lens portion 31a is for efficiently introducing extraneous light to the semiconductor devices 10 in each row, and has a wider directivity and a better light-collecting property than a case where it is formed on a flat surface. Excellent light-collecting and light-guiding properties.
- FIG. 2 An electric circuit equivalent to the light receiving semiconductor module 20 as the solar cell panel described above is as shown in FIG. 2 5 semiconductor devices 10 are arranged in a matrix of 5 rows and 5 columns, and semiconductor devices 10 in each column are electrically connected in series via six lead frames 29, and semiconductor devices 10 in each row Are electrically connected in parallel via a lead frame 29.
- the light receiving semiconductor module 20 is excellent in reliability and durability.
- the semiconductor device 10 is manufactured. Then, as shown in Fig. 7, the surface of a thin plate (thickness: about 0.3 mm) of iron-nickel alloy (Fe 56%, Ni 42%) was plated with gold with a thickness of about 3 mm.
- lead frame plates 21 to 26 having four openings 27 a and 27 b are manufactured.
- three lead frames 29 each having a large width (about 4 mm) and a narrow width (1.5 mm) parallel to the outer frame portion 28 are formed.
- the two lead frame plates 21 and 26 on both the upper and lower sides are bent at right angles in advance at both ends, and the four intermediate lead frame plates 22 to 25 are formed in a flat plate shape. I have.
- a conductive adhesive 30 a (for example, silver epoxy resin) is used on the lead frames 29 of the lead frame plates 21 to 25, respectively.
- Five semiconductor devices 10 are adhered at a constant pitch with the negative electrode 9a facing down.
- a conductive adhesive 3 Ob is applied on the positive electrode 9 b of the semiconductor device 10 on the lead frame 29.
- the lead frame 29 of the lead frame plate 22 is overlaid on the positive electrode 9b of the 15 (five 3) semiconductor devices 10 at the bottom.
- the lead frame plates 23 to 26 are sequentially stacked, and each of the 25 semiconductor devices 10 is aligned so as to have a regular matrix arrangement of 5 rows and 5 columns in a common vertical plane. .
- a predetermined weight is placed on the uppermost lead frame plate 26 so that the positive electrode 9 b and the negative electrode 9 a of each semiconductor device 10 are electrically connected to the upper and lower lead frames 29.
- a sheet (not shown) is placed and heated at a temperature of about 160 to 180 ° C. to harden the adhesive.
- FIG. 9 is an enlarged sectional view of the semiconductor device 10 and the lead frames 29 on the upper and lower sides thereof.
- an assembly 30 of 75 semiconductor devices 10 and 6 lead frame plates 21 to 26 is housed in a molding die (not shown). It is molded using a transparent synthetic resin (for example, acrylic resin or polycarbonate), and the semiconductor device 10 in 5 rows and 5 columns and the corresponding leads are provided in the light transmitting member 31 made of the transparent synthetic resin.
- the frame 29 is embedded and covered with the light transmitting member 31. In this manner, three sets of light receiving semiconductor modules 20 as solar cell panels are simultaneously formed.
- the light transmitting member 31 is formed with a partial cylindrical lens portion 31a for concentrating external light on both sides of the semiconductor device 10 in each row from both sides.
- the lead frame 29 is cut by a molding die at the cut portions 32 at both ends extending outward from the light transmitting member 31. I do.
- the cut portion is cut so that the lead frame 29 extends outside the light transmitting member 31 with the same width, and is separated from the outer frame portion 28.
- a positive electrode 9c formed by bonding an aluminum ball to a second flat surface 7 is formed.
- the P + type diffusion layer 8 is omitted.
- a gold ball may be used instead of the aluminum ball.
- Such ball-bonded electrodes form electrodes accurately in narrow spaces. It is suitable for forming low resistance contacts at lower temperatures than when diffusion or alloying. Since the height of the positive electrode 9c can be increased, the interval between the lead frame 29 and the electrode of the semiconductor device when semiconductor devices are connected in series can be increased. Therefore, it is suitable for applying a conductive adhesive only to the positive electrode 9c.
- the positive electrode 9c may be applied to the semiconductor device 10 described above.
- the semiconductor device 1 OA described above is also applicable to the semiconductor module 20 instead of the semiconductor device 10.
- the center of the true spherical semiconductor element 1a (5 mm in diameter) made of a p-type silicon single crystal (resistivity is ⁇ )
- a semiconductor device 1B having first and second flat surfaces 2, 7b formed in parallel on a pair of terms on both sides is formed.
- the diameters of the first and second flat surfaces 2 and 7b are about 0.6 mm and 0.8 mm, respectively, and the average diameters of the first and second flat surfaces 2 and 7b are the first and second flat surfaces 2, 7b, respectively. Is smaller than the distance between the flat surfaces 2 and 7b.
- phosphorus is diffused as an n-type doping impurity over the entire surface of the semiconductor element 1B to form an n + -type diffusion layer having a thickness of about 0.4 to 0.5 ⁇ m. 3 and a substantially spherical pn junction 4 b is formed via the diffusion layer 3.
- the silicon oxide film generated when diffusing phosphorus is removed by etching.
- a silver paste is printed on the center of the first flat surface 2 in a dot shape with a diameter of 0.4 mm and a thickness of about 0.2 mm, and the silver paste is oxidized. Heating and baking at a temperature of 600 to 800 ° C. in an inert gas or inert gas atmosphere to form a negative electrode 9 a connected to the diffusion layer 3 with low resistance.
- a dot-shaped aluminum film having a diameter of 0.4 mm and a thickness of about 0.3 mm is placed on the surface of the second flat surface 7b, and placed in an inert gas atmosphere or vacuum.
- the recrystallized layer 8 3 ⁇ 4 penetrates through the diffusion layer 3, the aluminum remaining on the surface has a low resistance contact with the P-type silicon single crystal portion through the p + -type recrystallized layer 8 b. Form 9d. Note that the pn junction 4b is connected to the p + n + junction 4d. Thereafter, an antireflection film is formed on the surface of the semiconductor element 1B.
- this semiconductor element 1B it is not necessary to diffuse boron as in the semiconductor device 10 described above, and the formation of the P + type recrystallized layer 8b and the formation of the positive electrode 9d can be performed simultaneously. . Since the height of the positive electrode 9d increases, the conductive adhesive can be applied without soiling the surface of the recrystallized layer 8b.
- gold (AuB) with an atomic ratio of 99% gold and about 1% boron or gold (AuGa) with an atomic ratio of about 99% gold and about 1% gallium is used.
- the formation of the recrystallized layer 8b and the formation of the positive electrode 9d can be performed simultaneously. It should be noted that this semiconductor device 10 B can also be applied to the semiconductor module 20 instead of the semiconductor device 10.
- a light-receiving semiconductor device 10 C suitable as a solar cell is composed of a columnar semiconductor element 41, first and second flat surfaces 42, 43, and an n-type semiconductor element 41. It has a diffusion layer 44, a pn junction 45, a p + type diffusion layer 47, a silicon oxide film 46 as an antireflection film, a negative electrode 49a, a positive electrode 49b, and the like.
- the semiconductor device 10C is formed in a short columnar shape and has a similar structure to the semiconductor device 10 although the shape is different from that of the semiconductor device 10C.
- the semiconductor element 41 is a columnar semiconductor element made of p-type silicon single crystal, and has a pair of first and second parallel flat surfaces 42, 43 orthogonal to the axis. It was formed.
- the diffusion layer 44 is formed on the surface of the first flat surface 42 and the outer peripheral surface of the semiconductor element 41, and a pn junction 45 is formed on the surface of the semiconductor element 41 via the diffusion layer 44. ing.
- the diffusion layer 44 on the second flat surface 42 is removed by mechanical chemical polishing, and a p + -type diffusion layer 47 is formed on the second flat surface 43.
- a negative electrode 49 a is provided on the surface of the diffusion layer 44 on the first flat surface 42, and the second flat surface In 43, a positive electrode 49b is formed on the surface of the diffusion layer 47.
- the diffusion layer 44, the pn junction 45, the diffusion layer 47, the positive electrode 49a and the negative electrode 49b are the same as those of the semiconductor device 10.
- FIGS. 22 and 23 an elongated, cylindrical semiconductor material 40 having a diameter of 1.5 mm made of a ⁇ -type silicon single crystal having a resistivity of about 1 ⁇ was manufactured.
- the columnar semiconductor material 40 is cut so that the length in the axial direction becomes 1.6 mm, and the first and second flat surfaces 42 and 43 parallel to each other at both ends are short.
- a columnar (ie, granular) semiconductor element 41 is manufactured.
- the columnar semiconductor material 40 made of p-type silicon single crystal is, for example, a nozzle-shaped hole drilled at the bottom of a crucible made of Daraite. It can be manufactured by growing a single crystal by bringing the melt into contact and pulling it down. Since it can be formed into a slender cylindrical shape, it is economical with little loss due to processing.
- the diameter of the columnar semiconductor material 40 is not limited to 1.5 mm, but may be about 1 to 3 mm.
- the diffusion A pn junction 45 is formed on the first flat surface 42 of the semiconductor element 41 and the surface layer of the outer peripheral surface via the layer 44.
- the silicon oxide film formed on the surface during the phosphorus diffusion is once removed using a hydrofluoric acid aqueous solution, and the semiconductor element 41 is heated in an oxygen atmosphere.
- a silicon oxide film 46 is formed on the entire surface.
- the second flat surface 43 is polished by a mechanical-chemical polishing method to remove the n + -type diffusion layer 44 to form a second flat surface 43 exposing the silicon single crystal.
- the center of the first and second flat surfaces 42, 43 has a diameter of 0.
- a silver paste having a thickness of about 5 mm and a thickness of about 0.2 mm is printed in the form of dots and baked in the same manner as the semiconductor device 10 to form a negative electrode 4 that has low resistance contact with the diffusion layers 44 and 47 respectively.
- 9a and positive electrode 49b are provided.
- a columnar semiconductor device 10 C suitable for a solar cell is obtained.
- a negative electrode and a positive electrode may be formed in the same manner as shown in FIGS. 18 to 21.
- This semiconductor device 10C is easier to manufacture than a spherical solar cell, has a uniform directivity in the radial direction of the semiconductor element, but not in all directions, and is more luminous than a planar cell. High performance and excellent photoelectric conversion performance can be obtained.
- a semiconductor module substantially similar to the semiconductor module 20 is used.
- 20 A can be constructed.
- the lead frame 29 A, the negative electrode terminal 34 A, the positive electrode terminal 35 As, and the light transmitting member 31 A of the semiconductor module 2 OA are the same as those of the semiconductor module 20. The description is omitted by attaching reference numerals. .
- this semiconductor module 20 B is composed of, for example, 72 (12 ⁇ 6) granular semiconductor devices 10 having a light receiving function and eight metallic semiconductor devices. It has a conductive mechanism 50 including annular lead frames 51 to 57 and a light transmitting member 58.
- the 72 semiconductor devices 10 are divided into 12 rows with the conduction directions aligned, and are arranged in a ring shape at equal intervals in the circumferential direction to form 12 rows.
- the conductive connection mechanism 50 includes an annular lead frame 51 with a lowermost negative terminal 51 a, a middle annular lead frame 52 to 56, and an annular lead frame with a positive electrode terminal 57a at the top. 5 and 7.
- the annular lead frames 52 to 56 are made of the same material and have the same thickness as the lead frame plates (21 to 26) of the embodiment, and are formed in an annular shape with a width of 1.5 mm.
- the annular lead frames 51 and 57 are made of the same material as the lead frame plates (21 to 26) and have a thickness of about 1.0 mm.
- Four negative electrode terminals 51 a and four positive electrode terminals 57 a are integrally formed on the annular lead frames 51 and 57, respectively.
- the conductive connection mechanism 50 electrically connects the six semiconductor devices 10 in each row in series and electrically connects the 12 semiconductor devices 10 in each ring in parallel.
- the cylindrical light transmitting member 58 is made of a transparent synthetic resin such as acrylic or polycarbonate and is formed in a thick cylindrical shape.
- the 12 rows of semiconductor devices 10 arranged in a ring shape are embedded in the peripheral wall 58 a of the light transmitting member 58.
- a diffuse reflection surface 58 b for irregularly reflecting the light transmitted through the peripheral wall 58 a toward the semiconductor device 10 is formed.
- the irregular reflection surface 58b is a large number of small viramid surfaces.
- annular lead frames 51 to 57 and 72 semiconductor devices 10 are manufactured and prepared.
- 12 semiconductor devices 10 were arranged on the upper surface of the annular lead frame 51 so that the negative electrode 9 a was at the bottom, and conductive bonding was performed.
- Glue with an agent After applying a conductive adhesive to the positive electrodes 9 b of the two semiconductor devices 10, an annular lead frame 52 is mounted thereon and adhered thereto, and this is sequentially repeated, After assembling as shown in FIG. 32, the adhesive is cured by heating while a predetermined weight is placed on the annular lead frame 57.
- 72 semiconductor devices 10 are incorporated between a plurality of annular lead frames 51 to 57 in a state where the conductive directions are aligned, divided into 12 rows, and formed into a ring at equal intervals in the circumferential direction.
- 6 semiconductor devices 10 in each row are connected in series via annular lead frames 51 to 57, and 12 semiconductor devices 10 in each ring are annular. Connect in parallel via lead frames 51 to 57.
- an assembly 60 shown in FIGS. 31 and 32 is obtained.
- the assembled body 60 is housed in a predetermined molding die, and a transparent synthetic resin is poured into the mold to form a thick cylindrical body made of a transparent synthetic resin shown in FIGS. 33 and 34.
- a transparent synthetic resin is poured into the mold to form a thick cylindrical body made of a transparent synthetic resin shown in FIGS. 33 and 34.
- Such a light transmitting member 58 is formed, and the two rows of semiconductor devices 10 are made of a transparent synthetic resin circle. It is embedded in the peripheral wall 58a of the cylindrical light transmitting member 58.
- the semiconductor module 20B since it is formed in a cylindrical shape as a whole, even if external light comes from any direction of 360 degrees around the entire circumference, it is reliably received and photoelectrically converted, and the negative electrode terminal 5 1 An electromotive force of about 4.2 volts is generated between a and the positive terminal 57a. Since the irregular reflection surface 58b is formed on the inner peripheral surface of the light transmitting member 58, the efficiency of photoelectric conversion is also increased. Then, due to the difference between the outer diameter and the inner diameter of the light transmitting member 58, the light having a large incident angle is guided so as to go around the inside of the peripheral wall 58a and reaches the semiconductor device 10 at a remote position.
- semiconductors 1 and 41 As a semiconductor constituting the semiconductor elements 1 and 41, other semiconductors, for example, a mixed crystal semiconductor of Si and Ge or a semiconductor having a multilayer structure may be used instead of silicon, or GaAs, I Any of semiconductors such as nP, GaP, GaN, and InCuSe may be applied, or other semiconductors may be applied.
- the conductivity type of the semiconductor elements 1 and 41 is not limited to the!) Type, but may be an n-type. In this case, a p-type diffusion layer is formed.
- the antireflection films 6a and 46 may be made of other insulating films such as titanium oxide other than the silicon oxide film.
- an electrode material such as metal paste other than silver paste, aluminum, or gold.
- solder may be applied instead of the conductive resin.
- tempered glass is mounted on both sides of the semiconductor module, and a transparent ethylenvinyl acetate (EVA) resin or the like is filled between the tempered glasses.
- EVA ethylenvinyl acetate
- any of the semiconductor devices 10 A, 10 B, and 10 C can be applied to the semiconductor modules 20, 20 A, and 20 B.
- the number and arrangement of the semiconductor devices to be mounted on the semiconductor modules 20, 2 OA and 20 B are not limited to those of the above-described embodiment, but can be freely set.
- the semiconductor module has been described as an example of a semiconductor module having a light receiving function
- the semiconductor module of the present invention is similarly applicable to a semiconductor module having a light emitting function.
- various spherical light emitting diodes proposed by the inventor of the present invention can be applied to W098 / 15983 and WO99 / 10935, Light emitting diodes having other various structures may be applied.
- the semiconductor module having such a light emitting function can be applied to a surface-emitting type lighting device, a monochrome or color display, or various display devices.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Photovoltaic Devices (AREA)
- Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)
- Solid State Image Pick-Up Elements (AREA)
- Light Receiving Elements (AREA)
Description
Claims
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
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KR1020027000604A KR100549250B1 (ko) | 2000-10-20 | 2000-10-20 | 발광 또는 수광용 반도체 모듈 및 그 제조 방법 |
EP00969976.0A EP1255303B1 (en) | 2000-10-20 | 2000-10-20 | Light-emitting or light-detecting semiconductor module and method of manufacture thereof |
CA002393222A CA2393222C (en) | 2000-10-20 | 2000-10-20 | Light-emitting or light-receiving semiconductor module and method for making the same |
CA2671924A CA2671924C (en) | 2000-10-20 | 2000-10-20 | Light-emitting or light-receiving semiconductor module and method for making the same |
PCT/JP2000/007360 WO2002035613A1 (fr) | 2000-10-20 | 2000-10-20 | Module a semi-conducteur emetteur ou recepteur de lumiere et procede de fabrication dudit module |
US10/169,017 US7205626B1 (en) | 2000-10-20 | 2000-10-20 | Light-emitting or light-receiving with plurality of particle-shaped semiconductor devices having light-emitting or light-receiving properties |
JP2002538488A JP4307834B2 (ja) | 2000-10-20 | 2000-10-20 | 発光又は受光用半導体モジュール |
CNB008124590A CN1182589C (zh) | 2000-10-20 | 2000-10-20 | 发光或者受光用半导体组件及其制造方法 |
AU79534/00A AU773471B2 (en) | 2000-10-20 | 2000-10-20 | Light-emitting or light-detecting semiconductor module and method of manufacture thereof |
EP06000575.8A EP1646089B1 (en) | 2000-10-20 | 2000-10-20 | Light-emitting or light-receiving semiconductor module and method for making the same |
TW089125598A TW466786B (en) | 2000-10-20 | 2000-12-01 | Semiconductor module for light-emitting or light-receiving and method of producing the same |
HK06105935.1A HK1083706A1 (zh) | 2000-10-20 | 2006-05-23 | 發光或者受光用半導體組件及其製造方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2000/007360 WO2002035613A1 (fr) | 2000-10-20 | 2000-10-20 | Module a semi-conducteur emetteur ou recepteur de lumiere et procede de fabrication dudit module |
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WO2002035613A1 true WO2002035613A1 (fr) | 2002-05-02 |
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PCT/JP2000/007360 WO2002035613A1 (fr) | 2000-10-20 | 2000-10-20 | Module a semi-conducteur emetteur ou recepteur de lumiere et procede de fabrication dudit module |
Country Status (10)
Country | Link |
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US (1) | US7205626B1 (ja) |
EP (2) | EP1255303B1 (ja) |
JP (1) | JP4307834B2 (ja) |
KR (1) | KR100549250B1 (ja) |
CN (1) | CN1182589C (ja) |
AU (1) | AU773471B2 (ja) |
CA (2) | CA2393222C (ja) |
HK (1) | HK1083706A1 (ja) |
TW (1) | TW466786B (ja) |
WO (1) | WO2002035613A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
CA2671924C (en) | 2013-06-11 |
EP1255303A1 (en) | 2002-11-06 |
JP4307834B2 (ja) | 2009-08-05 |
EP1646089A3 (en) | 2006-04-26 |
EP1646089A2 (en) | 2006-04-12 |
AU7953400A (en) | 2002-05-06 |
HK1083706A1 (zh) | 2006-07-07 |
US7205626B1 (en) | 2007-04-17 |
EP1255303A4 (en) | 2005-11-16 |
CN1373906A (zh) | 2002-10-09 |
JPWO2002035613A1 (ja) | 2004-03-04 |
TW466786B (en) | 2001-12-01 |
CA2393222C (en) | 2010-03-09 |
CA2671924A1 (en) | 2002-05-02 |
EP1255303B1 (en) | 2016-06-29 |
EP1646089B1 (en) | 2016-06-29 |
CN1182589C (zh) | 2004-12-29 |
CA2393222A1 (en) | 2002-05-02 |
KR20020069350A (ko) | 2002-08-30 |
AU773471B2 (en) | 2004-05-27 |
KR100549250B1 (ko) | 2006-02-03 |
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