US4985376A
Expired / Lapsed
US
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Conductive paste compositions and ceramic substrates
Assignee: AGC Inc
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Filing: 1990-01-19
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Granted: 1991-01-15
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Expires: 2010-01-19
Abstract
Abstract A surface conductive paste composition to be applied to the surface of a green sheet for a ceramic substrate or to the surface of a ceramic substrate after being fired and to be then fired, the solid content of which has a composition comprising from 80 to 99.9% by weight of Au powder, from 0.1 to 20% by weight of crystallized glass frit and from 0 to 19.9% by weight of non-crystallized glass frit, provided that the total of the crystallized glass frit and the non-crystallized glass frit is at most 20% by weight, and which has a lead compound powder incorporated in an amount of from 0 to 5% by weight based on the total amount of said composition.
Inventors
- 👤 Kazuo Sunahara
- 👤 Tsuneo Ichimatsu
- 👤 Yumiko Aoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:13
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/80; C04B41/81; C04B41/85; C04B41/88; C03; C03C; C03C8/00; C03C8/02; C03C8/10; C03C8/14; C03C8/18; C03C8/22; C04B41/009; C04B41/45; C04B41/50; C04B41/51; C04B41/5116; H; H01; H01B; H01B1/00; H01B1/14; H01B1/16; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; C04B2111/00; C04B2111/00474; C04B2111/00844; H05K3/00; H05K3/46; H05K3/4611; H05K3/4626; H05K3/4629
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
120 words
A surface conductive paste composition to be applied to the surface of a green sheet for a ceramic substrate or to the surface of a ceramic substrate after being fired and to be then fired, the solid content of which has a composition comprising from 88 to 99% by weight of Au powder, from 1 to 12% by weight of crystallized glass frit and from 0 to 11% by weight of non-crystallized glass frit, provided that the total of the crystallized glass frit and the non-crystallized glass frit is at most 12% by weight, and which has a lead compound powder incorporated in an amount of from 0.05 to 3% by weight based on the total amount of said composition.
Claim 2
Dependent Claim
120 words
A surface conductive paste composition to be applied to the surface of a green sheet for a ceramic substrate or to the surface of a ceramic substrate after being fired and to be then fired, the solid content of which has a composition comprising from 88 to 99% by weight of Au powder, from 1 to 12% by weight of crystallized glass frit and from 0 to 11% by weight of non-crystallized glass frit, provided that the total of the crystallized glass frit and the non-crystallized glass frit is at most 12% by weight, and which has a lead compound powder incorporated in an amount of from 0.05 to 3% by weight based on the total amount of said composition.
Claim 3
Dependent Claim
40 words
The surface conductive paste composition according to claim 1, wherein the lead compound powder is selected from the group consisting of PbTiO 3 , Pb(Ti,Zr)O 3 , PbNb 2 O 6 , PbTa 2 O 6 and PbZrO 3 .
Claim 4
Dependent Claim
96 words
An internal conductive paste composition to be used for a multi-layered ceramic substrate, the solid content of which has a composition comprising from 92 to 99% of Au powder, from 1 to 8% by weight of crystallized glass frit and from 0 to 7% by weight of non-crystallized glass frit, provided that the total of the crystallized glass frit and the non-crystallized glass frit is at most 8% by weight, and which has a lead compound powder incorporated in an amount of from 0.3 to 2% by weight based on the total amount of said composition.
Claim 5
Dependent Claim
96 words
An internal conductive paste composition to be used for a multi-layered ceramic substrate, the solid content of which has a composition comprising from 92 to 99% of Au powder, from 1 to 8% by weight of crystallized glass frit and from 0 to 7% by weight of non-crystallized glass frit, provided that the total of the crystallized glass frit and the non-crystallized glass frit is at most 8% by weight, and which has a lead compound powder incorporated in an amount of from 0.3 to 2% by weight based on the total amount of said composition.
Claim 6
Dependent Claim
43 words
The internal conductive paste composition according to claim 3, wherein the lead compound is at least one member selected from the group consisting of PbTiO 3 , Pb(Ti,Zr)O 3 , PbNb 2 O 6 , PbTa 2 O 6 and PbZrO 3 .
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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) | 1994-01-14 | 1994-07-16 | 1995-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-14 | 1998-07-16 | 1999-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-14 | 2002-07-16 | 2003-01-15 | $7700.00 | Window Closed / Lapsed |