US4865772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper thick film conductor composition
Assignee: DKS Co Ltd
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Filing: 1988-11-15
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Granted: 1989-09-12
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Expires: 2008-11-15
Abstract
Abstract A copper-containing thick film conductor composition comprising 55 to 95% by weight of an inorganic powder and 45 to 5% by weight of an organic medium, said inorganic powder comprising 100 parts by weight of a copper powder, 0.05 to 3 parts by weight of a zinc oxide powder, 1 to 7 parts by weight of a lead borate glass powder, 0.2 to 5 parts by weight of a borosilicate glass powder and 0 to 10 parts by weight of a copper snboxide powder having an average particle size of not more than 1.0 μm. The composition of the present invention is excellent in solderability and adhesive strength to the substrate.
Inventors
- 👤 Masatoshi Suehiro
- 👤 Masashi Echigo
- 👤 Yutaka Mitsune
- 👤 Masami Sakuraba
- 👤 Seiichi Nakatani
- 👤 Tsutomu Nishimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:00
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H01; H01B; H01B1/00; H01B1/14; H01B1/16
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
73 words
A copper-containing thick film conductor composition comprising 55 to 95% by weight of an inorganic powder and 45 to 5% by weight of an organic medium, said inorganic powder comprising 100 parts by weight of a copper powder, 0.05 to 3 parts by weight of a zinc oxide powder, 1 to 7 parts by weight of a lead borate glass powder and 0.2 to 5 parts by weight of a borosilicate glass powder.
Claim 2
Dependent Claim
73 words
A copper-containing thick film conductor composition comprising 55 to 95% by weight of an inorganic powder and 45 to 5% by weight of an organic medium, said inorganic powder comprising 100 parts by weight of a copper powder, 0.05 to 3 parts by weight of a zinc oxide powder, 1 to 7 parts by weight of a lead borate glass powder and 0.2 to 5 parts by weight of a borosilicate glass powder.
Claim 3
Dependent Claim
43 words
The composition of claim 1, which further contain a copper suboxide powder having an average particle size of not more than 1.0 μm in an amount of up to 10 parts by weight based on 100 parts by weight of said copper powder.
Claim 4
Dependent Claim
31 words
The composition of claim 1, wherein the amount of said zinc oxide powder is from 0.1 to 2 parts by weight based on 100 parts by weight of said copper powder.
Claim 5
Dependent Claim
31 words
The composition of claim 1, wherein the amount of said zinc oxide powder is from 0.3 to 1.5 parts by weight based on 100 parts by weight of said copper powder.
Claim 6
Dependent Claim
32 words
The composition of claim 1, wherein the amount of said lead borate glass powder is from 2 to 6 parts by weight based on 100 parts by weight of said copper powder.
Claim 7
Dependent Claim
30 words
The composition of claim 1, wherein the amount of said borosilicate powder is from 1 to 4 parts by weight based on 100 parts by weight of said copper powder.
Claim 8
Dependent Claim
31 words
The composition of claim 2, wherein the amount of said copper suboxide powder is from 3 to 8 parts by weight based on 100 parts by weight of said copper powder.
Claim 9
Dependent Claim
26 words
The composition of claim 1, which comprises 60 to 90% by weight of said inorganic powder and 40 to 10% by weight of said organic medium.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |