Patent US4016525A successfully refreshed from Google Patents.
US4016525A
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US
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Glass containing resistor having a sub-micron metal film termination
Assignee: Vishay Sprague Inc
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Filing: 1974-11-29
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Granted: 1977-04-05
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Expires: 1994-11-29
Abstract
Abstract A cermet resistor employs film terminations of sub-micron thickness. The terminations contain particles of SiO2 or MnO2 that may be conveniently made by mixing such particles in a metal resinate paste, screening the paste on a glazed or unglazed substrate and firing. A glass containing resistor paste is screened in overlapping relationship with the fired terminations and is itself fired. The particle additives ameliorate cracking of the terminations at resistor firing and enhance the termination to substrate bond.
Inventors
- 👤 John P. Maher
- 👤 Theodore W. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:06
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/28; H01C17/281; H01C17/283
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
A resistor comprising an insulating substrate; submicron noble metal film terminations being bonded to said substrate; a glass containing resistor layer, distal portions of said resistor layer having overlapping contact with said terminations; and manganese dioxide particles being contained in and constituting at least 17 weight percent of said terminations thereby reducing residual stresses in said terminations and improving the quality of the junction between said terminations and said resistor layer.
Claim 2
Dependent Claim
71 words
A resistor comprising an insulating substrate; submicron noble metal film terminations being bonded to said substrate; a glass containing resistor layer, distal portions of said resistor layer having overlapping contact with said terminations; and manganese dioxide particles being contained in and constituting at least 17 weight percent of said terminations thereby reducing residual stresses in said terminations and improving the quality of the junction between said terminations and said resistor layer.
Claim 3
Dependent Claim
30 words
The resistor of claim 1 wherein said resistor layer glass is a low temperature glass containing metal oxides selected from Bi 2 O 3 , CdO, PbO and mixtures thereof.
Claim 4
Dependent Claim
12 words
The resistor of claim 1 wherein said substrate is a ceramic material.
Claim 5
Dependent Claim
16 words
The resistor of claim 1 wherein said substrate is alumina having a smooth glaze coating thereon.
Claim 6
Dependent Claim
18 words
The resistor of claim 1 wherein said metal film terminations are comprised of a resinate derived noble metal.
Claim 7
Dependent Claim
18 words
The resistor of claim 1 wherein said sub-micron film terminations contain up to 22% by weight of glass.
Claim 8
Dependent Claim
13 words
The resistor of claim 1 wherein said terminations additionally include particles of silica.
References Cited (Backward Citations)
US3370262A
Cited
US3434877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |