# US 7,608,784 B2 · Photosensitive conductive paste for electrode formation and electrode

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- Number: US 7,608,784 B2
- Document ID: US7608784B2
- Status: Granted
- Kind: B2
- Application number: 11/486,249
- Filed: 2006-07-13
- Published: 2008-01-17
- Granted: 2009-10-27
- Earliest claimed: 2006-07-13
- Assignees: E. I. Du Pont de Nemours and Company
- Inventors: Atsuhiko Sato
- Web page: https://patentgrep.com/patent/US7608784B2

## CPC

- H05K 1/092: {Dispersed materials, e.g. conductive pastes or inks}
- G03F 7/0047: {characterised by additives for obtaining a metallic or ceramic pattern, e.g. by firing}
- H01J 9/02: Manufacture of electrodes or electrode systems
- H05K 3/02: in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
- H01J 2211/225: Material of electrodes
- H05K 2201/0112: Absorbing light, e.g. dielectric layer with carbon filler for laser processing
- H05K 2201/0323: Carbon
- H05K 2203/0514: Photodevelopable thick film, e.g. conductive or insulating paste
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- G03F: PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR; (phototypographic composing devices B41B; photosensitive materials or processes for photographic purposes G03C; electrophotography, sensitive layers or processes therefor G03G)
- H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H)

## Abstract

A photosensitive conductive paste for electrode formation, containing conductive metal particles, a glass binder, a monomer, a photoinitiator, an organic polymer binder, an organic medium and carbon black.

## Claims

### Claim 1

A photosensitive, photo-patternable, conductive paste for electrode formation, comprising: conductive metal particles, a glass binder, a monomer, a photoinitiator, an organic polymer binder, an organic medium and carbon black, wherein the content of the carbon black is 0.01 to 0.5 wt % based on the total paste weight, wherein the monomer content is 3-10 wt % of the total paste weight and wherein the monomer compound comprises one or more polymerizable ethylene group(s) and a compound containing at least one addition-polymerizable ethylenically unsaturated group, and wherein the glass binder is 1-10% of the weight % of the total paste weight and is composed of:
55-85 wt %
Bi2O3
0-20 wt %
SiO2
0-5 wt %
Al2O3
2-20 wt %
B2O3
0-20 wt %
ZnO
0-15 wt %
one or more of oxides selected from BaO, CaO, and SrO
0-3 wt %
one or more of oxides selected from Na2O, K2O, Cs2O
and Li2O.

### Claim 2

A photosensitive, photo-patternable, conductive paste for electrode formation, comprising: conductive metal particles, a glass binder, a monomer, a photoinitiator, an organic polymer binder, an organic medium and carbon black, wherein the content of the carbon black is 0.01 to 0.5 wt % based on the total paste weight;
wherein the monomer content is 3-10 wt % of the total paste weight and wherein the monomer comprises one or more polymerizable ethylene group(s) and a compound containing at least one addition-polymerizable ethylenically unsaturated group.

### Claim 3 (depends on 1, 2)

The photosensitive conductive paste for electrode formation according to claims 1 or 2 wherein the conductive particles are selected from the group consisting of gold, silver, platinum, palladium, copper and combinations thereof.

### Claim 4 (depends on 1)

The photosensitive conductive paste for electrode formation according to claim 1, wherein the conductive metal particles are silver particles.

### Claim 5 (depends on 1, 2)

An electrode formed using the conductive paste according to claim 1 or claim 2.

### Claim 6 (depends on 5)

A PDP comprising the electrode according to claim 5.

### Claim 7 (depends on 2)

The photosensitive, photo-patternable conductive paste of claim 2 wherein at least 80 percent by weight of the conductive metal particles present in the composition fall within a 0.5-10 μm range.