US4400683A
Expired / Lapsed
US
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Voltage-dependent resistor
Assignee: Panasonic Holdings Corp
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Filing: 1981-09-18
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Granted: 1983-08-23
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Expires: 2001-09-18
Abstract
Abstract A voltage-dependent resistor having at least one zinc oxide (ZnO) layer adjacent to at least one metal oxide layer of bismuth oxide (Bi2O3) and at least one of the members selected from the group consisting of cobalt oxide (Co2O3) manganese oxide (MnO2) antimony oxide (Sb2O3) and zinc oxide (ZnO).
Inventors
- 👤 Kazuo Eda
- 👤 Masanori Inada
- 👤 Michio Matsuoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:58
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H01C7/102
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
A voltage-dependent resistor of layered structure type, comprising at least one zinc oxide (ZnO) layer adjacent to at least one metal oxide layer consisting of 99.9˜60 mole percent of bismuth oxide (Bi 2 O 3 ) and at least one of the members selected from the group consisting of 0.1˜40 mole percent of cobalt oxide (Co 2 O 3 ), 0.1˜40 mole percent of manganese oxide (MnO 2 ), 0.1˜3.0 mole percent of antimony oxide (Sb 2 O 3 ) and 0.1˜17 mole percent of zinc oxide (ZnO) with electrodes applied to opposite surfaces.
Claim 2
Dependent Claim
94 words
A voltage-dependent resistor of layered structure type, comprising at least one zinc oxide (ZnO) layer adjacent to at least one metal oxide layer consisting of 99.9˜60 mole percent of bismuth oxide (Bi 2 O 3 ) and at least one of the members selected from the group consisting of 0.1˜40 mole percent of cobalt oxide (Co 2 O 3 ), 0.1˜40 mole percent of manganese oxide (MnO 2 ), 0.1˜3.0 mole percent of antimony oxide (Sb 2 O 3 ) and 0.1˜17 mole percent of zinc oxide (ZnO) with electrodes applied to opposite surfaces.
Claim 3
Dependent Claim
53 words
A voltage-dependent resistor according to claim 1, wherein said zinc oxide layer composition comprises at least one of the members selected from the group consisting of 0.001 to 0.1 mole percent of aluminum oxide (Al 2 O 3 ) and 0.001 to 0.1 mole percent of gallium oxide (Ga 2 O 3 ).
Claim 4
Dependent Claim
25 words
A voltage-dependent resistor according to claim 1, wherein one of said zinc oxide layer comprises a sintered body of zinc oxide as a main constituent.
Claim 5
Dependent Claim
17 words
A voltage-dependent resistor according to claim 1, wherein said metal oxide layer is deposited by sputtering method.
Claim 6
Dependent Claim
85 words
A voltage-dependent resistor according to claim 1, wherein said metal oxide layer comprises at least one of the members selected from the group consisting of strontium oxide (SrO), barium oxide (BaO), chromium oxide (Cr 2 O 3 ), tungsten oxide (WO 3 ), uranium oxide (UO 2 ), nickel oxide (NiO), silver oxide (Ag 2 O), boron oxide (B 2 O 3 ), silicon oxide (SiO 2 ), germanium oxide (GeO 2 ), tin oxide (SnO 2 ) lead oxide (PbO) and rare earth oxides.
References Cited (Backward Citations)
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US3689863A
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US3999159A
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JPS5266991A
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US4296002A
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US4319215A
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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) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |