US3968412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thick film capacitor
Assignee: General Electric Co
•
Filing: 1974-12-13
•
Granted: 1976-07-06
•
Expires: 1994-12-13
Abstract
Abstract A thick film capacitor is mounted on a substrate. The dielectric of the capacitor is barium titante which is combined with an alkali free barium zinc glass bonding agent having an electropositive element common with dielectric.
Inventors
- 👤 Roland T. Girard
- 👤 George A. Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:20
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1218; H01G4/1227; H01G4/129
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
170 words
A capacitor comprising a substrate having two opposed major surfaces; a first layer of an electrically conductive metal disposed on one of the major surfaces of the substrate to form a first electrode disposed thereon; a layer of dielectric material having a composition which includes a barium titanate material which is one selected from the group consisting of chemically pure barium titanate and chemically pure barium titanate modified with from about 0.125% to about 5.0% by weight of a metal oxide additive and from 3 percent to 7 percent by weight of a alkali-free binder having at least the electropositive element barium present therein, disposed on the first electrically conductive metal layer, the alkali-free glass binder has the following formulation: Ingredient % by weight
______________________________________
BaO 38 to 46
ZnO 7 to 11
SiO.sub.2 35 to 45
B.sub.2 O.sub.3
6 to 8
Al.sub.2 O.sub.3
2 to 5
______________________________________ a second layer of an electrically conductive metal disposed on the layer of dielectric material to form a second electrode disposed thereon.
Claim 2
Dependent Claim
170 words
A capacitor comprising a substrate having two opposed major surfaces; a first layer of an electrically conductive metal disposed on one of the major surfaces of the substrate to form a first electrode disposed thereon; a layer of dielectric material having a composition which includes a barium titanate material which is one selected from the group consisting of chemically pure barium titanate and chemically pure barium titanate modified with from about 0.125% to about 5.0% by weight of a metal oxide additive and from 3 percent to 7 percent by weight of a alkali-free binder having at least the electropositive element barium present therein, disposed on the first electrically conductive metal layer, the alkali-free glass binder has the following formulation: Ingredient % by weight
______________________________________
BaO 38 to 46
ZnO 7 to 11
SiO.sub.2 35 to 45
B.sub.2 O.sub.3
6 to 8
Al.sub.2 O.sub.3
2 to 5
______________________________________ a second layer of an electrically conductive metal disposed on the layer of dielectric material to form a second electrode disposed thereon.
Claim 3
Dependent Claim
35 words
The capacitor as set forth in claim 1 wherein the alkali-free glass binder has the following formulation: Ingredient % by weight
______________________________________
BaO 42
ZnO 9
SiO.sub.2 40
B.sub.2 O.sub.3
6
Al.sub.2 O.sub.3
3.
______________________________________
Claim 4
Dependent Claim
19 words
The capacitor as set forth in claim 1 wherein the glass binder includes titanium dioxide as an additive material.
Claim 5
Dependent Claim
27 words
A capacitor as set forth in claim 3 wherein the dielectric material comprises from 82% to 86% by weight barium titanate and the remainder is barium stannate.
Claim 6
Dependent Claim
49 words
The capacitor as set forth in claim 1 wherein the alkali-free glass binder has the following formulation: Ingredient % by weight
______________________________________
BaO 38 - 46
ZnO 7 - 11
SiO.sub.2 35 - 45
B.sub.2 O.sub.3
6 - 8
Al.sub.2 O.sub.3
2 - 5
TiO.sub.2 3 - 10.
______________________________________
Claim 7
Dependent Claim
37 words
The capacitor as set forth in claim 5 wherein the alkali-free glass binder has the following formulation: Ingredient % by weight
______________________________________
BaO 42.05
ZnO 9.00
SiO.sub.2 35.59
B.sub.2 O.sub.3
5.96
Al.sub.2 O.sub.3
2.67
TiO.sub.2 4.73.
______________________________________
Claim 8
Dependent Claim
27 words
The capacitor as set forth in claim 6 wherein the dielectric material comprises from 82% to 86% by weight barium titanate and the remainder is barium stannate.
Claim 9
Dependent Claim
27 words
The capacitor as set forth in claim 1 wherein the dielectric material comprises from 82% to 86% by weight barium titanate and the remainder is barium stannate.
Claim 10
Dependent Claim
27 words
A capacitor as set forth in claim 1 wherein the material of the substrate is one selected from the group consisting of alumina, beryllia, mullite and fosterite.
Claim 11
Dependent Claim
16 words
A capacitor as set forth in claim 9 wherein the material of the substrate comprises alumina.
Claim 12
Dependent Claim
27 words
A capacitor as set forth in claim 7 wherein the material of the substrate is one selected from the group consisting of alumina, beryllia, mullite and fosterite.
Claim 13
Dependent Claim
16 words
A capacitor as set forth in claim 11 wherein the material of the substrate comprises alumina.
Claim 14
Dependent Claim
27 words
A capacitor as set forth in claim 8 wherein the material of the substrate is one selected from the group consisting of alumina, beryllia, mullite and fosterite.
Claim 15
Dependent Claim
40 words
A capacitor as set forth in claim 1 wherein the material of the first and second electrodes comprises a material which is one selected from the group consisting of platinum, a platinum-palladium alloy, a platinum-gold alloy and a palladium-silver alloy.
Claim 16
Dependent Claim
41 words
The capacitor of claim 1 wherein the dielectric material composition is a modified barium titanate and the metal oxide additive is on selected from the class of materials consisting of lanthanum oxide, cerium compounds, stannates, zirconates, neodymium oxide and bismuth compounds.
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) | 1979-07-06 | 1980-01-05 | 1980-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-06 | 1984-01-05 | 1984-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-06 | 1988-01-05 | 1988-07-06 | $7700.00 | Window Closed / Lapsed |