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WO1997044203A1 - Procede de marquage d'un fluoropolymere - Google Patents

Procede de marquage d'un fluoropolymere Download PDF

Info

Publication number
WO1997044203A1
WO1997044203A1 PCT/US1997/000734 US9700734W WO9744203A1 WO 1997044203 A1 WO1997044203 A1 WO 1997044203A1 US 9700734 W US9700734 W US 9700734W WO 9744203 A1 WO9744203 A1 WO 9744203A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluoropolymer
set forth
definition media
engraving
character definition
Prior art date
Application number
PCT/US1997/000734
Other languages
English (en)
Inventor
William J. Shaner
Original Assignee
Empak, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Empak, Inc. filed Critical Empak, Inc.
Publication of WO1997044203A1 publication Critical patent/WO1997044203A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/22—Removing surface-material, e.g. by engraving, by etching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/24—Ablative recording, e.g. by burning marks; Spark recording
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/0002—Apparatus or processes for manufacturing printed circuits for manufacturing artworks for printed circuits
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms

Definitions

  • the present invention relates generally to a method for patterned depositions of a material onto a substrate for marking purposes. More particularly, the present invention relates to a system for applying information to a fluoropolymer substrate involving engraving a pattern in the fluoropolymer substrate with a laser or other high precision engraving means, applying a fluoropolymer-compatible character definition media (ink) within the etched pattern, and curing or bonding the character definition media to the etched pattern to provide a simple and durable marking on the fluoropolymer substrate which can withstand exposure to harsh chemicals and high temperatures.
  • ⁇ Discussion of the Prior Art
  • fluoropolymer trays or carriers for transporting semiconductor wafers or memory disks.
  • Fluoropolymer materials are attractive for this use due to their low dielectric constant, low dissipation factors, high thermal stability, and high chemical resistance.
  • the fluoropolymer carriers provide a static-free, safe environment for the sensitive electronics during transportation between the various processing locations within a single manufacturing facility and/or between different manufacturing facilities.
  • the fluoropolymer carriers are capable of withstanding exposure to the high temperatures and harsh chemicals found in electronics manufacturing processes.
  • the optically transparent cover allows the bar code label to be read by various sensing devices such that the progress of the carrier may be monitored during the manufacturing processes.
  • the cost of materials used to make the trays is increased due to the need for a separate bar code label and an optically transparent cover, above and beyond the carrier itself.
  • the cost associated with manufacturing the trays is increased due to the special tooling required to effectuate the molding of the recessed area, as well as the labor required to insert the bar code label into the recessed area and to hermetically seal the optically transparent cover over the recessed area.
  • Another popular approach to combating the inertness of fluoropolymer materials involves modifying the surface of the fluoropolymer article to more readily accept the application of adhesives, paint, and the like.
  • One particular technique focuses on adding various materials to the fluoropolymer during the molding of the article and thereafter treating portions of the surface of the molded article to improve the adhesion characteristics and wetting properties thereof In this regard, U S.
  • Patent No 5,320,789 issued to Nishii et al discloses a method for modifying the surface of a fluorine resin which entails adding a heat resistant light-absorbing compound to the resin during the molding of the resin into a particular article
  • the molded article comprising a combination of fluorine resin and the heat resistant light absorbing compound, is then etched with a laser to create selected portions having improved adhesion characteristics and improved wetting properties on the surface of the molded article As indicated above, these etched areas are then more capable of accepting of adhesives for the application of labels and various paints for marking purposes
  • U S Patent No 5,470,617, also issued to Nishii et al discloses a similar arrangement, wherein an ultra-violet absorbing compound and a fluorosurfactant are combined with the fluorine resin during the molding of an article The molded article is then irradiated with an ultra-violet laser to again create etched areas having improved adhesion characteristics and wetting properties In similar fashion, U.S
  • Patent No 5,273,789 issued to Shinonaga et al. entails adding various quantities of (1) propylene, (2) ethylene-propylene copolymer rubber, and (3) ethylene-acrylic or ethylene- methacrylic acid copolymer to a polypropylene resin during the molding of an article
  • the molded article is thereafter irradiated with ultra- violet light to create etched portions having improved adhesion and wetting characteristics
  • ultra-violet irradiation in that, when administered improperly, it may result in unsatisfactory adhesive and wetting properties and/or deterioration of the etched surface
  • U.S. Patent No. 5,362,525 issued to Nishii et al. discloses one such method, wherein the surface of a fluorine resin is modified for improved adhesion and wetting characteristics by irradiating the resin with an ultra ⁇ violet laser in the presence of an inorganic silicon compound.
  • the inorganic silicon compound may take the form of a fine powder which is directly spread on the surface of the fluorine resin, or an aqueous solution which is in direct contact with the surface of the fluorine resin.
  • the inorganic silicon compound must first be in contact with the surface of the fluorine resin prior to ultra-violet irradiation.
  • U.S. Patent No. 5,419,968 issued to Okada et al. discloses a similar method.
  • the surface of the fluororesin is hydrophilized by irradiating a portion of the molding with an ultra-violet laser while the molding is in contact with a gas-treated water solution.
  • a disadvantage exists with these methods however, in that a substantial amount of time and resources must be expended to ensure that the various solutions or materials are evenly distributed about the surface of the molded articles, and in the appropriate proportions.
  • a still further object of the present invention is to provide a marking system that is highly visible such that, as a bar code or the like, the marking may be easily detected by scanning systems and, as a trademark or logo, the marking will be readily apparent to members of the consuming public. It is another object of the present invention to provide a marking system which does not require any special treatment or mixing procedures during the molding of the fluoropolymer article such that previously existing molded articles may be readily marked regardless of when the article was molded.
  • a method for applying information to a fluoropolymer substrate comprising the steps of: (a) engraving the fluoropolymer substrate to define at least one engraved recess area extending a predetermined depth below a surface of the fluoropolymer substrate; (b) introducing a quantity of character definition media into the at least one recess area; and (c) curing the character definition media within the at least one recess area to form a bond between the character definition media the said at least one recess area
  • the aforementioned objects are attained by providing a system for marking a fluoropolymer substrate, comprising the steps of (a) engraving the fluoropolymer substrate to form at least one engraved portion therein, and (b) providing a quantity of fluoropolymer- compatible character definition media within the at least one engraved portion
  • a method for marking a fluoropolymer earner for use in transporting electronic components comprising the steps of (a) engraving at least one mark on a surface of the fluoropolymer earner wherein the at least one mark comprises at least one of an alphanume ⁇ c character, a bar code, and a symbol, and (b) curing a quantity of fluoropolymer-compatible character definition media within the at least one mark
  • FIGURE 1 is a perspective view illustrating a fluoropolymer carrier 10 for use in transporting electronic components equipped with a bar code marking 20 in accordance with the present mvention
  • FIGURE 2A is a cross sectional view of a fluoropolymer substrate 30 with a plurality of engraved portions 40 formed therein, and
  • FIGURE 2B is a cross sectional view of the fluoropolymer substrate 30 with each of the plurality of engraved portions 40 filled with a fluoropolymer-compatible character definition media 50 to accomplish the desired fluoropolymer marking system of the present invention
  • FIG 1 shown in perspective is a fluoropolymer carrying tray 10 for use in transporting semiconductor wafers or memory disks capable of being marked in accordance with the fluoropolymer marking system of the present invention
  • Fluoropolymer resins are ideal for use in this regard due to their low dielectric constant, low dissipation factors, high thermal stability, and high chemical resistance, thereby providing a static-free, safe environment for sensitive electronics during transportation between the various processing locations within a single manufacturing facility and/or between different manufacturing facilities.
  • Fluoropolymer resins for use in the marking system of the present invention may include, but are not limited to, the following: copolymer of tetrafluoroethylene with perfluoroalkoxyethylene (PFA), copolymer of tetrafluoroethylene with hexafluoroproylene (FEP), polytetrafluoroethylene (PTFE), te ⁇ olymer of tetrafluoroethylene with hexafluoropropylene and perfluoroalkoxyethylene (EPE), copolymer of tetrafluoroethylene with ethylene (ETFE), polychlorotrifluoroethylene (PCTFE), copolymer of trifluorochloroethylene with ethylene (ECTFE), polyvinylidene fluoride (P VDF), and polyvinyl fluoride (PVF)
  • the fluoropolymer resin comprises PFA
  • fluoropolymer articles such as the carrying tray 10 are capable of being marked with indicia without the use of external labels or sophisticated etching techniques which require special additives within the fluoropolymer resin and/or etching in the presence of various compositions.
  • this marking takes the form of a bar code comprising a plurality of vertically oriented lines, indicated generally at reference numeral 20
  • bar codes such as the bar code 20 are used in conjunction with optical scanning systems so as to automate and expedite data entry to facilitate item identification, inventory tracking, or the like, thereby replacing the tedious and repetitious task of manual data entry
  • this may be accomplished by positioning scanning devices at various points throughout manufacturing or assembly process to read and interpret the bar code 20 located on the surface of the carrying tray 10
  • each and every carrying tray 10 can be tracked and documented during transportation for, among other reasons, maximizing the efficiency of said transfer operations Referring now to FIGS.
  • the fluoropolymer marking system of the present invention includes the steps of: (1) engraving a fluoropolymer substrate to form at least one engraved portion therein; and (2) providing a quantity of fluoropolymer-compatible character definition media within the at least one engraved portion.
  • selected portions of the surface of the fluoropolymer substrate 30 are engraved to form at least one engraved or recessed portion therein. For illustration purposes, a plurality of engraved portions 40 are shown in FIGS.
  • the engraved portions 40 of present invention may be patterned to formed any number or combination of alphanumeric characters, bar code, and symbols including, but not limited to, trademarks and similar logos.
  • This step of engraving can be accomplished via any number of etching or engraving techniques.
  • this engraving step is performed through the use of a laser which is capable of selectively and accurately removing portions from the surface of the fluoropolymer substrate 30.
  • a laser which is capable of selectively and accurately removing portions from the surface of the fluoropolymer substrate 30.
  • a carbon dioxide laser is particularly suitable for engraving various indicia in articles molded from PFA fluoropolymer resin.
  • each engraved portion 40 comprises a highly resolved marking which extends a predetermined depth D below the surface of the fluoropolymer substrate 30.
  • the second step in the marking system of the present invention involves the use of a fluoropolymer-compatible character definition media. More specifically, with reference to FIG. 2B, a quantity of fluoropolymer-compatible character definition media 50 is introduced into the engraved portions 40 of FIG. 2 A. If required, the character definition media 50 may be thereafter cured in any number of appropriate fashions to ensure for the formation of a strong bond between the character definition media 50 and 97 7 4
  • the character definition media 50 may comprise any number of commercially available inks capable of being thermally or chemically bondable to fluoropolymer resins, including but not limited to Gem Type FEP TEFLON® Black 6020 black ink produced by Gem Gravure Company, Inc.
  • This particular fluoropolymer-compatible character definition media comprises approximately 59% MIBK, 25% MEK, 6% diacotone alcohol, 5% butyl carbitol, and 5% butyl alcohol. Character definition media solutions having similar compositions are likewise within the ambit of the present invention and restriction to the above-identified percentages or manufacturer is not to be inferred.
  • a suitable character definition media comprising MIBK in a concentration ranging between 50 and 70 percent, MEK in a concentration ranging between 20 and 30 percent, diacotone alcohol in a concentration ranging between 1 and 10 percent, butyl carbitol in a concentration ranging between 1 and 10 percent, and butyl alcohol in a concentration ranging between 1 and 10 percent
  • the Gem Type FEP TEFLON ® Back 6020 black ink was found to be particularly useful in providing highly resolved bar code markings on the surface of carrying trays, such as that shown in FIG. 1, which are molded from PFA and/or FEP fluoropolymer resins.
  • the actual introduction of the character definition media 50 within the engraved portions 40 may be performed in any number of suitable fashions
  • the character definition media 50 may be soaked up within a cotton swab or other similarly absorbent material and dabbed over each engraved portion 40 to fill the entire depth D of each engraved portion 40 with the character definition media 50.
  • the fluoropolymer marking system of the present invention provides a highly resolved bar code 20 comprising a plurality of vertically oriented engraved portions disposed in side- by-side relation along a front surface of the fluoropolymer carrying tray 10. To accomplish this marking, each vertically oriented engraved portion of the bar code 20 is formed within the surface of the carrying tray 10 using a carbon dioxide laser engraver.
  • each engraved portion of the bar code 20 should have a predetermined depth D of at least 2 one thousands of an inch to ensure that the character definition media will not be inadvertently smudged or removed from within each engraved portion during the process of cleaning up any excess character definition media from the surface of the fluoropolymer substrate prior to curing the character definition media within the engraved portions.
  • the curing process may entail a simple drying process, thermal or otherwise, a chemical bonding process, and/or a physical bonding process or any combination thereof.
  • the present invention provides a marking system for applying information to a fluoropolymer substrate which is economical, easy to implement, and requires no custom molding nor the use of separate labels and hermetically sealed recessed areas.
  • the marking system of the present invention is capable of withstanding high temperatures and harsh chemicals found in electronics manufacturing processes and operations and further produces highly visible markings that may be identified easily by scanning systems and/or members of the consuming public.
  • the present invention also provides a marking system which does not require any special treatment or mixing procedures during the molding of the fluoropolymer article such that previously existing molded articles may be readily marked regardless of when the article was molded.
  • the marking system of the present invention does not require the application of supplemental solutions or substances to the molded article during laser etching treatments.
  • the present invention also provides a method of marking fluoropolymer articles which involves a rn ⁇ iimal number of conditioning steps before the article is capable of readily accepting adhesives and/or surface coatings.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laser Beam Processing (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)

Abstract

On décrit un procédé d'application d'informations sur un substrat de fluoropolymère (30), consistant à graver un motif dans ce substrat à l'aide d'un laser, à appliquer dans le motif un milieu de définition de caractères (de l'encre), compatible avec le fluoropolymère, et à durcir ce milieu (50) dans le motif gravé ou à le fixer à ce motif, afin d'obtenir un marquage simple et durable sur le substrat de fluoropolymère, lequel peut supporter l'exposition à des produits chimiques agressifs et à une température élevée, tout en mettant en valeur le marquage d'une manière prononcée et très visible.
PCT/US1997/000734 1996-05-21 1997-01-17 Procede de marquage d'un fluoropolymere WO1997044203A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US64720096A 1996-05-21 1996-05-21
US08/647,200 1996-05-21

Publications (1)

Publication Number Publication Date
WO1997044203A1 true WO1997044203A1 (fr) 1997-11-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/000734 WO1997044203A1 (fr) 1996-05-21 1997-01-17 Procede de marquage d'un fluoropolymere

Country Status (2)

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KR (1) KR970074827A (fr)
WO (1) WO1997044203A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999003688A1 (fr) * 1997-07-16 1999-01-28 Otis Elevator Company Procedes et compositions pour impression laser et articles imprimes grace a ces procedes ces compositions
US5919853A (en) * 1996-01-30 1999-07-06 Otis Elevator Company Method and compositions for laser imprinting and articles imprinted using such methods and composition
WO2006025016A1 (fr) * 2004-09-03 2006-03-09 Koninklijke Philips Electronics N.V. Procede et appareil d'application d'un motif, element et dispositif dotes d'un tel motif
WO2006033852A3 (fr) * 2004-09-17 2006-06-22 Eastman Kodak Co Structuree utilisant un materiau erodable sensible au rayonnement
DE19983807B4 (de) * 1998-12-14 2008-12-11 Becton Dickinson France Vorrichtung zur Oberflächenmarkierung eines festen Substrats
EP3061620A1 (fr) * 2015-02-25 2016-08-31 Venair Inc. Tuyau tubulaire présentant une couche externe pourvue d'un code et procédé pour la fabrication de celui-ci

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61228991A (ja) * 1985-04-02 1986-10-13 Fujitsu Ltd 電子部品の捺印方法
US4915981A (en) * 1988-08-12 1990-04-10 Rogers Corporation Method of laser drilling fluoropolymer materials

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61228991A (ja) * 1985-04-02 1986-10-13 Fujitsu Ltd 電子部品の捺印方法
US4915981A (en) * 1988-08-12 1990-04-10 Rogers Corporation Method of laser drilling fluoropolymer materials

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5919853A (en) * 1996-01-30 1999-07-06 Otis Elevator Company Method and compositions for laser imprinting and articles imprinted using such methods and composition
WO1999003688A1 (fr) * 1997-07-16 1999-01-28 Otis Elevator Company Procedes et compositions pour impression laser et articles imprimes grace a ces procedes ces compositions
DE19983807B4 (de) * 1998-12-14 2008-12-11 Becton Dickinson France Vorrichtung zur Oberflächenmarkierung eines festen Substrats
WO2006025016A1 (fr) * 2004-09-03 2006-03-09 Koninklijke Philips Electronics N.V. Procede et appareil d'application d'un motif, element et dispositif dotes d'un tel motif
WO2006033852A3 (fr) * 2004-09-17 2006-06-22 Eastman Kodak Co Structuree utilisant un materiau erodable sensible au rayonnement
US8796583B2 (en) 2004-09-17 2014-08-05 Eastman Kodak Company Method of forming a structured surface using ablatable radiation sensitive material
EP3061620A1 (fr) * 2015-02-25 2016-08-31 Venair Inc. Tuyau tubulaire présentant une couche externe pourvue d'un code et procédé pour la fabrication de celui-ci

Also Published As

Publication number Publication date
KR970074827A (ko) 1997-12-10

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