US4859364A
Expired / Lapsed
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Conductive paste composition
Assignee: EIDP Inc
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Filing: 1988-05-25
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Granted: 1989-08-22
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Expires: 2008-05-25
Abstract
Abstract A conductive paste composition consisting of an admixture of: (a) conductive metal particles having an average particle size of about 0.3 to 1.0 mu m; (b) particles uniformly coated with a conductive metal and having an average particle size of not more than 1 mu m; and (c) an organic medium, the admixture of particles (a) and (b) being dispersed in the organic medium.
Inventors
- 👤 Yasuo Yamamoto
- 👤 Akira Inaba
- 👤 Takashi Kitagaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:19
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; B; B22; B22F; B22F1/00; H01; H01B; H01B1/00; H01B1/20; H01B1/22; H01G; H01G4/00; H01G4/002; H01G4/005; H01G4/008; H01G4/0085
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
78 words
A conductive thick film paste consisting of (a) 60-90% by weight of an admixture of solids consisting of (1) 89-99% by weight, basis solids, of conductive metal particles having an average particle size of 0.3-1.0 μm, and (2) 11-1% by weight, basis solids, of metal oxide particles coated with a conductive metal, the coated particles having a particle size of no more than 1 μm, the admixture being dispersed in (b) 40-10% by weight of an organic medium.
Claim 2
Dependent Claim
78 words
A conductive thick film paste consisting of (a) 60-90% by weight of an admixture of solids consisting of (1) 89-99% by weight, basis solids, of conductive metal particles having an average particle size of 0.3-1.0 μm, and (2) 11-1% by weight, basis solids, of metal oxide particles coated with a conductive metal, the coated particles having a particle size of no more than 1 μm, the admixture being dispersed in (b) 40-10% by weight of an organic medium.
Claim 3
Dependent Claim
21 words
A conductive paste composition according to claim 1, wherein the particles(b) are TiO 2 particles uniformly coated with the conductive metal.
Claim 4
Dependent Claim
22 words
A conductive paste composition according to claim 2, wherein the conductive metals of the particles (a) and (b) are of the same.
Claim 5
Dependent Claim
16 words
A conductive paste composition according to claim 3, wherein the conductive metal is a precious metal.
Claim 6
Dependent Claim
14 words
A conductive paste composition according to claim 4, wherein the precious metal is palladium.
Claim 7
Dependent Claim
40 words
A conductive paste composition according to claim 5, wherein a total content of TiO 2 in the composition falls within a range of 1 to 11% by weight with respect to a total content of the particles (a) and (b).
Claim 8
Dependent Claim
40 words
A conductive paste composition according to claim 5, wherein a total content of TiO 2 in the composition falls within a range of 4 to 8% by weight with respect to a total content of the particles (a) and (b).
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) | 1992-08-21 | 1993-02-20 | 1993-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-21 | 1997-02-20 | 1997-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-21 | 2001-02-20 | 2001-08-22 | $7700.00 | Window Closed / Lapsed |