Patent US3877950A successfully refreshed from Google Patents.
US3877950A
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US
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Photosensitive gold compositions
Assignee: EIDP Inc
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Filing: 1974-03-21
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Granted: 1975-04-15
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Expires: 1994-03-21
Abstract
Abstract A photopolymerizable gold composition comprising finely divided gold and an inorganic binder therefor in a vehicle comprising certain methacrylate polymers and solvent therefor, di-, tri- or tetra-ethyleneglycoldiacrylate monomer and a photoinitiator therefor, and optionally an organometallic compound of Hf, Zr, Ti or P. This provides a printable paste composition compatible with thick-film techniques used for fabricating electrically conductive patterns and layers on substances for electronic circuits.
Inventors
- 👤 John James Felten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:34
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/0047; H; H01; H01B; H01B1/00; H01B1/14; H01B1/16; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K3/00; H05K3/02; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/109
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
130 words
A GOLD CONDUCTOR COMPOSITION COMPRISING FINELY DIVIDED GOLD AND AN INORGANIC BINDER THEREFOR DISPERSED IN A PHOTOSENSITIVE VEHICLE, SAID VEHICLE COMPRISING, BY WEIGHT A. 15-45 PARTS OF A POLYMER HAVING AN INHERENT VISCOSITY, IN CHLOROFORM AT 25*C., IN THE RANGE OF 0.15 TO 0.95, SAID POLYMER BEING SELECTED FROM THE CLASS CONSISTING OF POLYMETHYLMETHACRYLATE, POLYETHYLMETHACRYLATE, AND MIXTURES THEREOF, B. 55-85 PARTS OF A SOLVENT FOR POLYMER (A), SAID SOLVENT BEING SELECTED FROM THE CLASS CONSITING OF DIHYDROTERPINEOL, BENZYL ALCOHOL, TETRALIN, AND MIXTURES THEREOF, C. A MONOMER SELECTED FROM THE CLASS CONSISTING OF DI-, TRI, AND TETRA-ETHYLENEGLYCOLDIACRYLATE AND MIXTURES THEREOF, THE WEIGHT OF MONOMER (C) BEING 3-20% OF THE TOTAL WEIGHT OF POLYMER (A) PLUS SOLVENT (B), D. A PHOTOINITIATOR FOR MONOMER (C) IN AN AMOUNT EFFECTIVE TO INITIATE POLYMERIZATION THEREOF.
Claim 2
Dependent Claim
130 words
A GOLD CONDUCTOR COMPOSITION COMPRISING FINELY DIVIDED GOLD AND AN INORGANIC BINDER THEREFOR DISPERSED IN A PHOTOSENSITIVE VEHICLE, SAID VEHICLE COMPRISING, BY WEIGHT A. 15-45 PARTS OF A POLYMER HAVING AN INHERENT VISCOSITY, IN CHLOROFORM AT 25*C., IN THE RANGE OF 0.15 TO 0.95, SAID POLYMER BEING SELECTED FROM THE CLASS CONSISTING OF POLYMETHYLMETHACRYLATE, POLYETHYLMETHACRYLATE, AND MIXTURES THEREOF, B. 55-85 PARTS OF A SOLVENT FOR POLYMER (A), SAID SOLVENT BEING SELECTED FROM THE CLASS CONSITING OF DIHYDROTERPINEOL, BENZYL ALCOHOL, TETRALIN, AND MIXTURES THEREOF, C. A MONOMER SELECTED FROM THE CLASS CONSISTING OF DI-, TRI, AND TETRA-ETHYLENEGLYCOLDIACRYLATE AND MIXTURES THEREOF, THE WEIGHT OF MONOMER (C) BEING 3-20% OF THE TOTAL WEIGHT OF POLYMER (A) PLUS SOLVENT (B), D. A PHOTOINITIATOR FOR MONOMER (C) IN AN AMOUNT EFFECTIVE TO INITIATE POLYMERIZATION THEREOF.
Claim 3
Dependent Claim
33 words
A gold composition according to claim 1 wherein said photosensitive vehicle additionally comprises (e) an organometallic compound of a metal selected from the class consisting of Hf, Zr, Ti, P or mixtures thereof.
Claim 4
Dependent Claim
35 words
A gold composition according to claim 2 wherein the amount of (e) is such that the weight ratio of metal in organometallic compound (e) to photoinitiator (d) is in the range of 1/10 to 1/2.5.
Claim 5
Dependent Claim
36 words
Gold compositions according to claim 1 wherein solvent (b) is dihydroterpineol, benzyl alcohol, or a mixture thereof, said vehicle additionally comprising 1-12 parts of polymeric rheology modifier selected from the class consisting of ethylcellulose and polybutylmethacrylate.
Claim 6
Dependent Claim
36 words
Gold compositions accOrding to claim 2 wherein solvent (b) is dihydroterpineol, benzyl alcohol, or a mixture thereof, said vehicle additionally comprising 1-12 parts of polymeric rheology modifier selected from the class consisting of ethylcellulose and polybutylmethacrylate.
Claim 7
Dependent Claim
37 words
Gold compositions according to claim 1 wherein the vehicle comprises 20-35 parts polymer (a), 65-80 parts solvent (b) and an amount of monomer (c) equal to 4-16% of the total weight of polymer (a) plus solvent (b).
Claim 8
Dependent Claim
37 words
Gold compositions according to claim 2 wherein the vehicle comprises 20-35 parts polymer (a), 65-80 parts solvent (b) and an amount of monomer (c) equal to 4-16% of the total weight of polymer (a) plus solvent (b).
Claim 9
Dependent Claim
24 words
A gold composition according to claim 1 wherein polymer (a) has an inherent viscosity, in chloroform at 25*C., in the range 0.15 to 0.5.
Claim 10
Dependent Claim
24 words
A gold composition according to claim 2 wherein polymer (a) has an inherent viscosity, in chloroform at 25*C., in the range 0.15 to 0.5.
Claim 11
Dependent Claim
24 words
A gold composition according to claim 6 wherein polymer (a) has an inherent viscosity, in chloroform at 25*C., in the range 0.15 to 0.5.
Claim 12
Dependent Claim
24 words
A gold composition according to claim 7 wherein polymer (a) has an inherent viscosity, in chloroform at 25*C., in the range 0.15 to 0.5.
Claim 13
Dependent Claim
22 words
A gold composition according to claim 1 wherein the weight of photoinitiator (d) is about 5-50% of the weight of monomer (c).
Claim 14
Dependent Claim
15 words
A gold composition according to claim 2 wherein (e) is an organometallic compound of hafnium.
Claim 15
Dependent Claim
15 words
A gold composition according to claim 2 wherein (e) is an organometallic compound of zirconium.
Claim 16
Dependent Claim
15 words
A gold composition according to claim 2 wherein (e) is an organometallic compound of titanium.
Claim 17
Dependent Claim
15 words
A gold composition according to claim 2 wherein (e) is an organometallic compound of phosphorus.
Claim 18
Dependent Claim
15 words
A gold composition according to claim 3 wherein (e) is an organometallic compound of hafnium.
Claim 19
Dependent Claim
15 words
A gold composition according to claim 3 wherein (e) is an organometallic compound of zirconium.
Claim 20
Dependent Claim
15 words
A gold composition according to claim 3 wherein (e) is an organometallic compound of titanium.
Claim 21
Dependent Claim
15 words
A gold composition according to claim 3 wherein (e) is an organometallic compound of phosphorus.
Claim 22
Dependent Claim
26 words
A gold composition according to claim 1 wherein the weight of gold plus inorganic binder comprises 70-90% of the composition and the photosensitive vehicle 10-30% thereof.
Claim 23
Dependent Claim
26 words
A gold composition according to claim 2 wherein the weight of gold plus inorganic binder comprises 70-90% of the composition and the photosensitive vehicle 10-30% thereof.
Claim 24
Dependent Claim
19 words
A gold composition according to claim 21 wherein the gold plus inorganic binder comprises 75-85% and the vehicle 15-25%.
Claim 25
Dependent Claim
19 words
A gold composition according to claim 22 wherein the gold plus inorganic binder comprises 75-85% and the vehicle 15-25%.
Claim 26
Dependent Claim
19 words
A gold composition according to claim 1 wherein the inorganic binder is 0.5-10% of the weight of the gold.
Claim 27
Dependent Claim
19 words
A gold composition according to claim 2 wherein the inorganic binder is 0.5-10% of the weight of the gold.
Claim 28
Dependent Claim
19 words
A gold composition according to claim 23 wherein the inorganic binder is 0.5-10% of the weight of the gold.
Claim 29
Dependent Claim
19 words
A gold composition according to claim 24 wherein the inorganic binder is 0.5-10% of the weight of the gold.
Claim 30
Dependent Claim
35 words
A gold composition according to claim 3 wherein the amount of (e) is such that the weight ratio of metal in (e) to the weight of photoinitiator (d) is in the range 1/8.3 to 1/4.
Claim 31
Dependent Claim
35 words
A gold composition according to claim 7 wherein the amount of (e) is such that the weight ratio of metal in (e) to the weight of photoinitiator (d) is in the range 1/8.3 to 1/4.
Claim 32
Dependent Claim
35 words
A gold composition according to claim 9 wherein the amount of (e) is such that the weight ratio of metal in (e) to the weight of photoinitiator (d) is in the range 1/8.3 to 1/4.
Claim 33
Dependent Claim
35 words
A gold composition according to claim 22 wherein the amount of (e) is such that the weight ratio of metal in (e) to the weight of photoinitiator (d) is in the range 1/8.3 to 1/4.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |