US4807085A
Expired / Lapsed
US
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Nonlinear capacitor for generating high-voltage pulses
Assignee: Iwasaki Electric Co Ltd
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Filing: 1988-05-20
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Granted: 1989-02-21
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Expires: 2008-05-20
Abstract
Abstract A nonlinear capacitor for generating high-voltage pulses comprises a ferroelectric substrate, electrode layers formed on both sides of said substrate, a mineral glass coating covering the entire surface of the capacitor except for the connector portions for said electrode layers and for the outer peripheral surface of said ferroelectric ceramic substrate, and lead terminals electrically connected to the electrode layers through said connector portions. This construction prevents the mechanical oscillation due to electrostriction from being restrained, thereby permitting the capacitor to generate high-voltage pulses of great amplitude and energy.
Inventors
- 👤 Minoru Yasukawa
- 👤 Takenobu Iida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:44
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/228; H01G2/00; H01G2/12; H01G7/00; H01G7/06
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
62 words
A nonlinear capacitor for generating high-voltage pulses, comprising a ferroelectric ceramic substrate, electrode layers formed on both sides of said substrate, a mineral glass coating covering the entire surface of the capacitor except for connector portions for said electrode layers and for the outer peripheral surface of said substrate, and lead terminals electrically connected to said electrode layers through said connector portions.
Claim 2
Dependent Claim
62 words
A nonlinear capacitor for generating high-voltage pulses, comprising a ferroelectric ceramic substrate, electrode layers formed on both sides of said substrate, a mineral glass coating covering the entire surface of the capacitor except for connector portions for said electrode layers and for the outer peripheral surface of said substrate, and lead terminals electrically connected to said electrode layers through said connector portions.
Claim 3
Dependent Claim
22 words
A nonlinear capacitor for generating high-voltage pulses according to claim 1, wherein said mineral glass coating is composed of ferroelectric crystallized glass.
Claim 4
Dependent Claim
67 words
A nonlinear capacitor for generating high-voltage pulses according to claim 1, wherein said lead terminals are made of a material which consists mainly of nickel, iron and nickel, or iron and nickel and cobalt, as its main constituent(s) and are composed of plate-like portions which are affixed to the capacitor by means of an electrically conductive adhesive and bar-like portions which extend vertically from said plate-like portions.
Claim 5
Dependent Claim
115 words
A nonlinear capacitor for generating high-voltage pulses, comprising a ferroelectric ceramic substrate, electrode layers formed on both sides of said substrate, a mineral glass coating covering the entire surface of the capacitor except for connector portions for said electrode layers and for the outer peripheral surface of said substrate, electrically conductive layers formed on the outer surfaces of said mineral glass coating in such a manner that they cover said connector portions and the portions corresponding to the positions for connecting lead terminals which are not in line with said connector portions, and lead terminals connected to said electrically conductive layers at said positions for connecting lead terminals by means of an electrically conductive adhesive.
Claim 6
Dependent Claim
115 words
A nonlinear capacitor for generating high-voltage pulses, comprising a ferroelectric ceramic substrate, electrode layers formed on both sides of said substrate, a mineral glass coating covering the entire surface of the capacitor except for connector portions for said electrode layers and for the outer peripheral surface of said substrate, electrically conductive layers formed on the outer surfaces of said mineral glass coating in such a manner that they cover said connector portions and the portions corresponding to the positions for connecting lead terminals which are not in line with said connector portions, and lead terminals connected to said electrically conductive layers at said positions for connecting lead terminals by means of an electrically conductive adhesive.
Claim 7
Dependent Claim
30 words
A nonlinear capacitor for generating high-voltage pulses according to claim 4, wherein said lead terminals are attached to the capacitor at positions corresponding to the center of the ceramic substrate.
Claim 8
Dependent Claim
35 words
A nonlinear capacitor for generating high-voltage pulses according to claim 3, wherein said connector portions for said electrode layers are arranged at positions within 65% of the radius of said ceramic substrate from the center.
Claim 9
Dependent Claim
21 words
A nonlinear capacitor for generating high-voltage pulses according to claim 6, wherein said electrically conductive layers are of a rectangular configuration.
Claim 10
Dependent Claim
31 words
A nonlinear capacitor for generating high-voltage pulses according to claim 6, wherein said electrically conductive layers are formed as circular layers with their centers at the center of the ceramic substrate.
Claim 11
Dependent Claim
21 words
A nonlinear capacitor for generating high-voltage pulses according to claim 5, wherein said electrically conductive layers are of a rectangular configuration.
Claim 12
Dependent Claim
31 words
A nonlinear capacitor for generating high-voltage pulses according to claim 5, wherein said electrically conductive layers are formed as circular layers with their centers at the center of the ceramic substrate.
Claim 13
Dependent Claim
67 words
A nonlinear capacitor for generating high-voltage pulses according to claim 5, wherein said lead terminals are made of a material which consists mainly of nickel, iron and nickel, or iron and nickel and cobalt, as its main constituent(s) and are composed of plate-like portions which are affixed to the capacitor by means of an electrically conductive adhesive and bar-like portions which extend vertically from said plate-like portions.
Claim 14
Dependent Claim
21 words
A nonlinear capacitor for generating high-voltage pulses according to claim 4, wherein said electrically conductive layers are of a rectangular configuration.
Claim 15
Dependent Claim
22 words
A nonlinear capacitor for generating high-voltage pulses according to claim 4, wherein said mineral glass coating is composed of ferroelectric crystallized glass.
Claim 16
Dependent Claim
39 words
A nonlinear capacitor for generating high-voltage pulses according to claim 4, wherein said electrically conductive adhesive is a paste mixture consisting of silver powder and a low-melting-point glass powder containing lead oxide and boric oxide as its main constituents.
Claim 17
Dependent Claim
67 words
A nonlinear capacitor for generating high-voltage pulses according to claim 4, wherein said lead terminals are made of a material which consists mainly of nickel, iron and nickel, or iron and nickel and cobalt, as its main constituent(s) and are composed of plate-like portions which are affixed to the capacitor by means of an electrically conductive adhesive and bar-like portions which extend vertically from said plate-like portions.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |