US4780248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thick film electronic materials
Assignee: EIDP Inc
•
Filing: 1987-02-06
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Granted: 1988-10-25
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Expires: 2007-02-06
Abstract
Abstract Thick film electronic compositions comprising finely divided particles of electrically functional material and a PbO-compatible inorganic binder dispersed in an organic medium in which 0.1 to 10.0% wt. lead nitrate is coated on the surface of at least one of the solide components.
Inventors
- 👤 Paul C. Donohue
- 👤 Vincent P. Siuta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:37
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/14; H01B1/16; H01B1/06; H01B3/00; H01B3/02; H01B3/08; H01B3/085; H01B3/087; H01B3/10; H01B3/12; H01C; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06513; H01C17/06533; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
27 words
Finely divided particles of electrically functional solids individually coated with a layer of solid lead nitrate which constitutes 0.1 to 10% by weight of the uncoated particles.
Claim 2
Dependent Claim
27 words
Finely divided particles of electrically functional solids individually coated with a layer of solid lead nitrate which constitutes 0.1 to 10% by weight of the uncoated particles.
Claim 3
Dependent Claim
16 words
The coated solid particles of claim 1 in which the solids are comprised of resistance oxide.
Claim 4
Dependent Claim
17 words
The coated solid particles of claim 1 in which the solids are comprised of dielectric ceramic oxide.
Claim 5
Dependent Claim
16 words
The coated solid particles of claim 1 in which the solids are comprised of conductive metal.
Claim 6
Dependent Claim
25 words
Finely divided particles of glass individually coated with a layer of solid lead nitrate which constitutes 0.1 to 10% by weight of the uncoated particles.
Claim 7
Dependent Claim
25 words
Finely divided particles of glass individually coated with a layer of solid lead nitrate which constitutes 0.1 to 10% by weight of the uncoated particles.
Claim 8
Dependent Claim
25 words
The composition of claim 5 in which the electrically functional material is a resistance oxide on the particle surfaces of which lead nitrate is coated.
Claim 9
Dependent Claim
25 words
The composition of claim 6 in which the lead nitrate is coated on the particle surfaces of both the resistance material and the inorganic buffer.
Claim 10
Dependent Claim
26 words
The composition of claim 5 in which the electrically functional material is a dielectric ceramic oxide on the particle surfaces of which lead nitrate is coated.
Claim 11
Dependent Claim
26 words
The composition of claim 8 in which the lead nitrate is coated on the particle surfaces of both the dielectric ceramic oxide and the inorganic binder.
Claim 12
Dependent Claim
46 words
A dielectric layer comprising a thick film of the composition of claim 8 or claim 9 which has been printed upon a substrate and fired to effect decomposition of the lead nitrate, complete voltilization of the organic medium therefrom and densification of the dielectric ceramic oxide.
Claim 13
Dependent Claim
25 words
The composition of claim 5 in which the electrically functional material is a conductive metal on the particle surfaces of which lead nitrate is coated.
Claim 14
Dependent Claim
25 words
The composition of claim 9 in which the lead nitrate is coated on the particle surfaces of both the conductive metal and the inorganic binder.
Claim 15
Dependent Claim
45 words
A conductive layer comprising a thick film of the composition of claim 11 or claim 12 which has been printed upon a substrate and fired to effect decomposition of the lead nitrate, complete volatilization of the organic medium therefrom and sintering of the conductive metal.
Claim 16
Dependent Claim
65 words
In a thick film electronic composition comprising finely divided particles of an electrically functional material and a PbO-compatible inorganic binder dispersed in an organic medium, the improvement which comprises incorporating into the dispersion as a coating on individual particles of at least one of the solids components 0.1 to 10% by weight, basis weight of the coated component before being coated, of solid lead nitrate.
Claim 17
Dependent Claim
65 words
In a thick film electronic composition comprising finely divided particles of an electrically functional material and a PbO-compatible inorganic binder dispersed in an organic medium, the improvement which comprises incorporating into the dispersion as a coating on individual particles of at least one of the solids components 0.1 to 10% by weight, basis weight of the coated component before being coated, of solid lead nitrate.
Claim 18
Dependent Claim
34 words
A thick film encapsulant composition comprising finely divided particles of PbO-compatible glass dispersed in an organic medium, the individual particles of the glass being coated with 0.1 to 10% by weight solid lead nitrate.
Claim 19
Dependent Claim
34 words
A thick film encapsulant composition comprising finely divided particles of PbO-compatible glass dispersed in an organic medium, the individual particles of the glass being coated with 0.1 to 10% by weight solid lead nitrate.
Claim 20
Dependent Claim
46 words
An encapsulant coating comprising a thick film layer of the composition of claim 15 which has been printed upon an electrically functional substrate and fired to effect decomposition of the lead nitrate, complete volatilization of the organic medium therefrom and liquid phase sintering of the glass.
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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) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |