US3811937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature fired electrical components and method of making same
Assignee: MRA Laboratories Inc
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Filing: 1971-12-09
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Granted: 1974-05-21
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Expires: 1991-12-09
Abstract
Abstract A low temperature fired glass-ceramic system encompassing a series of temperature compensating bodies having temperature coefficients that cover a wide range and possessing dielectric constants of from 30 to 125. This system consists of a mixture of a prefired blend of baria, titania and rare earth oxides, and a low firing glass formulation wherein the mixture is fired within the temperature range of 1,800*F to 2,100*F. A slip suspension of this mixture can be used to manufacture monolithic capacitors that utilize a relatively inexpensive palladium-silver electrode.
Inventors
- 👤 G Maher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:16
CPC Classifications
H; H01; H01G; H01G7/00; C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/064; C03C3/066; C03C3/12; C03C3/122; C03C8/00; C03C8/14; C03C8/20; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; H01B; H01B1/00; H01C; H01C7/00; H01C7/04; H01C7/041; H01C7/10; H01C7/105; H01C7/108; H01C7/115; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1218; H01G4/1227; H01G4/129; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K1/09; H05K1/092; H05K1/16; H05K1/162; H05K3/00; H05K3/46; H05K3/4611; H05K3/4626; H05K3/4629
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
14 words
The electrical component of claim 1 wherein said rare earth oxide is neodymium oxide.
Claim 2
Dependent Claim
28 words
The electrical component of claim 1 wherein said at least one metallic film is a silver-palladium alloy in the range of 60-85 percent silver and 15-40 percent palladium.
Claim 3
Dependent Claim
12 words
The combination of claim 1 wherein the glass formulation consists essentially of:
Claim 4
Dependent Claim
34 words
The combination of claim 1 wherein said fired blend consists essentialLy of 20 percent by weight of the low firing temperature glass formulation and 80 percent by weight of the high temperature ceramic mixture.
Claim 5
Dependent Claim
15 words
The combination of claim 1 wherein said fired blend contains a proportion of calcium titanate.
Claim 6
Dependent Claim
41 words
The combination of claim 6 wherein said fired blend consists essentially of 20 percent by weight of the low firing temperature glass formulation and 80 percent by weight of a mixture of said high temperature ceramic mixture and said calcium titanate.
Claim 7
Independent Claim
108 words
A method of forming a low temperature fired ceramic electrical component by forming a body from a slurry with at least one metallic film within said body, and firing said body, wherein the improvement comprises: ball-milling a high temperature ceramic mixture of 0-30 mole percent baria, 45-95 mole percent titania and 5-50 mole percent of a rare earth oxide selected from neodymium and/or lanthanum; calcining said high temperature ceramic mixture at a temperature of between 2,250*F to 2,600*F; making said slurry of from 70 to 92% by weight of said calcined mixture and from 8 to 30% by weight of a low firing glass formulation consisting essentially of
Claim 8
Dependent Claim
41 words
The method of claim 8 wherein said slurry consists of from 70 to 92 percent by weight of a mixture of calcium titanate and said calcined mixture with from 8 to 30 percent by weight of said low firing glass formulation.
Claim 9
Dependent Claim
12 words
The method of claim 8 wherein said glass formulation consists essentially of:
Claim 10
Dependent Claim
52 words
The method of claim 10 wherein said slurry consists of 80 percent by weight of calcium titanate and said calcined mixture and 20 percent by weight of said low firing glass formulation, and said at least one metallic film is a silver-palladium alloy in the range of 60-85% silver and 15-40% palladium.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |