US4470098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer ceramic dielectric capacitors
Assignee: STC PLC
•
Filing: 1983-02-17
•
Granted: 1984-09-04
•
Expires: 2003-02-17
Abstract
Abstract A multilayer ceramic dielectric capacitor comprises a plurality of layers of dielectric arranged in a stack. Between the dielectric layers are arranged metallic electrodes. Alternate electrodes in the stack extend to opposite end faces thereof, where they are electrically connected by end terminations. The electrodes each comprise a plurality of parallel conductive elements provided between two adjacent dielectric layers. The adjacent dielectric layers are bonded together along three of their edges and at the gaps between the conductive elements, thus providing a stronger structure than when the adjacent layers are only bonded at the three of their edges. The electrode pattern comprised by a plurality of parallel elements is particularly applicable to metal-impregnated ceramic dielectric capacitors, which employ fugitive electrodes that are burnt away during firing of the ceramic to leave spaces for subsequent metal impregnation.
Inventors
- 👤 John H. Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:21
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/005; H01G4/012; H01G4/30; H01G4/302; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
127 words
A method of manufacturing a multilayer ceramic capacitor comprising the steps of: producing a plurality of sheets of an unfired dielectric material; forming a pattern of spaced parallel strips of a fugitive electrode material which becomes flowable at a predetermined temperature on at least some of the sheets, said strips extending to a common edge; stacking said sheets such that said pattern is confined between two adjacent sheets and alternate fugitive electrode material extends to opposite end faces of the stack; firing the stack at said predetermined temperature to bond said sheets together at areas devoid of said fugitive electrode material and to cause said fugitive electrode material to escape from said sheets establishing voids at such locations; and impregnating said voids with lead to obtain electrodes.
Claim 2
Independent Claim
127 words
A method of manufacturing a multilayer ceramic capacitor comprising the steps of: producing a plurality of sheets of an unfired dielectric material; forming a pattern of spaced parallel strips of a fugitive electrode material which becomes flowable at a predetermined temperature on at least some of the sheets, said strips extending to a common edge; stacking said sheets such that said pattern is confined between two adjacent sheets and alternate fugitive electrode material extends to opposite end faces of the stack; firing the stack at said predetermined temperature to bond said sheets together at areas devoid of said fugitive electrode material and to cause said fugitive electrode material to escape from said sheets establishing voids at such locations; and impregnating said voids with lead to obtain electrodes.
Claim 3
Dependent Claim
23 words
The method as claimed in claim 1, further including the step of providing end terminations on the opposite end faces of the stack.
Claim 4
Dependent Claim
59 words
A multilayer ceramic capacitor comprising a stack of layers of ceramic material and an electrode provided between at least two adjacent layers, said electrode being of lead and arranged in a pattern of spaced parallel strips which extend to a common edge of said layers, said layers being bonded together at least at the locations devoid of said electrode.
Claim 5
Dependent Claim
59 words
A multilayer ceramic capacitor comprising a stack of layers of ceramic material and an electrode provided between at least two adjacent layers, said electrode being of lead and arranged in a pattern of spaced parallel strips which extend to a common edge of said layers, said layers being bonded together at least at the locations devoid of said electrode.
Claim 6
Independent Claim
108 words
A method of manufacturing a multilayer ceramic capacitor comprising the steps of: producing a plurality of sheets of an unfired dielectric material; forming a pattern of spaced parallel strips of a fugitive electrode material which becomes flowable at a predetermined temperature on at least some of the sheets; stacking said sheets such that said pattern is confined between two adjacent sheets; firing the stack at said predetermined temperature to bond said sheets together at areas devoid of said fugitive electrode material and to cause said fugitive electrode material to escape from said sheets establishing voids at such locations; and impregnating said voids with a metal to obtain electrodes.
Claim 7
Independent Claim
108 words
A method of manufacturing a multilayer ceramic capacitor comprising the steps of: producing a plurality of sheets of an unfired dielectric material; forming a pattern of spaced parallel strips of a fugitive electrode material which becomes flowable at a predetermined temperature on at least some of the sheets; stacking said sheets such that said pattern is confined between two adjacent sheets; firing the stack at said predetermined temperature to bond said sheets together at areas devoid of said fugitive electrode material and to cause said fugitive electrode material to escape from said sheets establishing voids at such locations; and impregnating said voids with a metal to obtain electrodes.
Claim 8
Dependent Claim
53 words
A multilayer ceramic capacitor comprising a stack of layers of ceramic material and an electrode provided between at least two adjacent layers, said electrode being of a conductive material and being arranged in a pattern of spaced parallel strips, said layers being bonded together at least at the locations devoid of said electrode.
Claim 9
Dependent Claim
53 words
A multilayer ceramic capacitor comprising a stack of layers of ceramic material and an electrode provided between at least two adjacent layers, said electrode being of a conductive material and being arranged in a pattern of spaced parallel strips, said layers being bonded together at least at the locations devoid of said electrode.
Claim 10
Dependent Claim
86 words
A multilayer ceramic capacitor comprising a stack of layers of ceramic formed from unfired ceramic material, and an electrode provided between at least two adjacent layers and being arranged in a pattern of spaced parallel strips, said electrode being constituted by a conductive material impregnated in voids which were formed between the layers when a fugitive electrode material escaped from between the layers at a temperature approaching that of the firing temperature of the ceramic, said adjacent layers being bonded together at locations adjacent said electrode.
Claim 11
Dependent Claim
86 words
A multilayer ceramic capacitor comprising a stack of layers of ceramic formed from unfired ceramic material, and an electrode provided between at least two adjacent layers and being arranged in a pattern of spaced parallel strips, said electrode being constituted by a conductive material impregnated in voids which were formed between the layers when a fugitive electrode material escaped from between the layers at a temperature approaching that of the firing temperature of the ceramic, said adjacent layers being bonded together at locations adjacent said electrode.
References Cited (Backward Citations)
US2861321A
Cited
GB1272490A
Cited
GB1246784A
Cited
US3852877A
Cited
GB1285525A
Cited
US3879645A
Cited
GB1486794A
Cited
US4342143A
Cited
GB1510891A
Cited
US4301580A
Cited
US4347650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |