# US 7,611,746 B2 · Electromagnetic-wave-shielding light-transmitting window member and method for producing the same

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- Number: US 7,611,746 B2
- Document ID: US7611746B2
- Status: Granted
- Kind: B2
- Application number: 11/431,608
- Filed: 2006-05-11
- Published: 2007-02-15
- Granted: 2009-11-03
- Earliest claimed: 2003-11-14
- Assignees: Bridgestone Corporation
- Inventors: Tatsuya Funaki; Hidefumi Kotsubo; Kiyomi Sasaki
- Web page: https://patentgrep.com/patent/US7611746B2

## CPC

- H05K 9/0005: {Shielded windows}
- C03C 17/34: with at least two coatings having different compositions (C03C17/44 takes precedence)
- C23C 18/1608: {from pretreatment step, i.e. selective pre-treatment}
- C23C 18/1612: {through irradiation means}
- C23C 18/1868: {Radiation, e.g. UV, laser}
- C23C 18/1879: {Use of metal, e.g. activation, sensitisation with noble metals}
- C23C 18/1882: {Use of organic or inorganic compounds other than metals, e.g. activation, sensitisation with polymers}
- C23C 18/204: {Radiation, e.g. UV, laser}
- C23C 18/206: {Use of metal other than noble metals and tin, e.g. activation, sensitisation with metals (sensitising with tin C23C18/285, sensitising with noble metals C23C18/30)}
- C23C 18/2066: {Use of organic or inorganic compounds other than metals, e.g. activation, sensitisation with polymers}
- C23C 18/31: Coating with metals
- H05K 9/0096: {for television displays, e.g. plasma display panel}
- C03C 2217/476: Tin oxide or doped tin oxide
- C03C 2217/479: Metals
- H01J 2211/446: Electromagnetic shielding means; Antistatic means
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H)

## Abstract

A method for producing an electromagnetic-wave-shielding light-transmitting window member comprising a transparent substrate and a conductive pattern formed by electroless plating on a surface of the transparent substrate. In the method, an ultraviolet-curable resin paste containing an electroless plating catalyst is applied to a surface of a transparent substrate, and the resulting printed pattern is cured by irradiation of ultraviolet light to form a resin pattern. Subsequently, a plating layer is deposited on the resin pattern by electroless plating treatment to form a conductive pattern. The ultraviolet-curable resin paste is selected from a group of sublimable resists and phthalocyanine-based sublimable materials and contains a volatile substance that is volatized by heating or irradiation. By using the ultraviolet-curable resin paste, a good conductive pattern having excellent adhesion to the transparent substrate can be formed with high accuracy, efficiently, and at low cost.

## Claims

### Claim 1

A method for producing an electromagnetic-wave-shielding light-transmitting window member comprising a transparent substrate and a conductive pattern formed by electroless plating on a surface of the transparent substrate, the method comprising the steps of:
applying, by printing, an ultraviolet-curable resin paste containing an electroless plating catalyst to the surface of the transparent substrate;
curing the resulting printed pattern by irradiation of ultraviolet light to form a resin pattern having the same pattern as the conductive pattern; and
subsequently depositing a conductive material on the resin pattern by electroless plating treatment to form the conductive pattern,
wherein the ultraviolet-curable resin paste contains a volatile substance that sublimates by irradiation of ultraviolet light; after the resin pattern is formed, the volatile component sublimates from the resin pattern to expose particles of the electroless plating catalyst on the surface of the resin pattern; and then the electroless plating treatment is carried out,
wherein the UV light sublimable volatile substance is at least one material selected from the group consisting of sublimable resists and phthalocyanine-based sublimable materials.

### Claim 2 (depends on 1)

The method for producing the electromagnetic-wave-shielding light-transmitting window member according to claim 1, wherein the ultraviolet-curable resin paste further contains a photoinitiator, and the content of the electroless plating catalyst is 10 to 700 parts by weight based on 100 parts by weight of the resin component, the content of the photoinitiator is 2 to 10 parts by weight based on 100 parts by weight of the resin component, and the content of the volatile substance is 10 to 100 parts by weight based on 100 parts by weight of the resin component.

### Claim 3 (depends on 1)

The method for producing the electromagnetic-wave-shielding light-transmitting window member according to claim 1, wherein the thickness of the resulting plating layer is 0.1 to 10 μm.

### Claim 4 (depends on 1)

The method for producing the electromagnetic-wave-shielding light-transmitting window member according to claim 1, wherein the resin pattern is formed in a lattice shape.

### Claim 5 (depends on 4)

The method for producing the electromagnetic-wave-shielding light-transmitting window member according to claim 4, wherein the conductive pattern has a line width of 30 μm to 200 μm and an open area ratio of 75% or more.