Patent US4338223A successfully refreshed from Google Patents.
US4338223A
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US
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Method of manufacturing a voltage-nonlinear resistor
Assignee: Marcon Electronics Co Ltd
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Filing: 1980-05-07
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Granted: 1982-07-06
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Expires: 2000-05-07
Abstract
Abstract A voltage-nonlinear resistor having a good polarity characteristics is manufactured by sintering a composition containing metal zinc, zinc oxide and at least one oxide selected from the group consisting of nickel oxide, zirconium oxide, yttrium oxide, hafnium oxide and scandium oxide, each component being contained in an amount within a specific range.
Inventors
- 👤 Yuji Yokomizo
- 👤 Kiyoshi Minami
- 👤 Noboru Ichinose
- 👤 Yoshikazu Tanno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:00
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01C; H01C7/00; H01C7/10; H01C7/105; H01C7/108; H01C7/112; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
127 words
A method of manufacturing a voltage-nonlinear resistor comprising: providing a starting composition comprising 0.01 to 10 mol % of a first additive selected from the group consisting of nickel oxide and its precursor, 0.01 to 10 mol % of a second additive selected from the group consisting of zirconium oxide or its precursor, yttrium oxide or its precursor, hafnium oxide or its precursor, and scandium oxide or its precursor, 0.01 to 10 mol % of metal zinc and the remainder being zinc oxide; shaping said starting composition to provide a desired molded body; sintering said starting composition at a temperature of at least about 1,100° C. to form a sintered body having a voltage-nonlinear resistance characteristic; and providing said sintered body with electrodes on both major surfaces.
Claim 2
Independent Claim
127 words
A method of manufacturing a voltage-nonlinear resistor comprising: providing a starting composition comprising 0.01 to 10 mol % of a first additive selected from the group consisting of nickel oxide and its precursor, 0.01 to 10 mol % of a second additive selected from the group consisting of zirconium oxide or its precursor, yttrium oxide or its precursor, hafnium oxide or its precursor, and scandium oxide or its precursor, 0.01 to 10 mol % of metal zinc and the remainder being zinc oxide; shaping said starting composition to provide a desired molded body; sintering said starting composition at a temperature of at least about 1,100° C. to form a sintered body having a voltage-nonlinear resistance characteristic; and providing said sintered body with electrodes on both major surfaces.
Claim 3
Dependent Claim
25 words
A method according to claim 1, wherein said first additive is contained in the starting composition in an amount of 0.5 to 1 mol %.
Claim 4
Dependent Claim
25 words
A method according to claim 1, wherein said second additive is contained in the starting composition in an amount of 0.5 to 1 mol %.
Claim 5
Dependent Claim
19 words
A method according to claim 1 or 3, wherein said second additive is zirconium oxide or a precursor thereof.
Claim 6
Dependent Claim
19 words
A method according to claim 1 or 3, wherein said second additive is yttrium oxide or a precursor thereof.
Claim 7
Dependent Claim
19 words
A method according to claim 1 or 3, wherein said second additive is hafnium oxide or a precursor thereof.
Claim 8
Dependent Claim
19 words
A method according to claim 1 or 3, wherein said second additive is scandium oxide or a precursor thereof.
Claim 9
Dependent Claim
24 words
A method according to claim 1, wherein metal zinc is contained in the starting composition in an amount of 3 to 6 mol %.
Claim 10
Dependent Claim
22 words
A method according to claim 1, wherein said starting composition contains cerium or praseodymium in an amount up to 0.5 mol %.
Claim 11
Dependent Claim
19 words
A method according to claim 1, wherein said starting composition is sintered to about 1,150° C. to 1,200° C.
Claim 12
Dependent Claim
17 words
A method according to claim 10, wherein said starting composition is sintered for 2 to 4 hours.
Claim 13
Dependent Claim
15 words
A method according to claim 11, wherein said starting composition is sintered in the air.
Claim 14
Dependent Claim
21 words
A voltage-nonlinear resistor manufactured by the method according to any one of claims 1 to 3, 8, 9, 10, to 12.
Claim 15
Dependent Claim
11 words
A voltage-nonlinear resistor manufactured by the method according to claim 4.
Claim 16
Dependent Claim
11 words
A voltage-nonlinear resistor manufactured by the method according to claim 5.
Claim 17
Dependent Claim
11 words
A voltage-nonlinear resistor manufactured by the method according to claim 6.
Claim 18
Dependent Claim
11 words
A voltage-nonlinear resistor manufactured by the method according to claim 7.
References Cited (Backward Citations)
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US4060661A
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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) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |