US4071878A
Expired / Lapsed
US
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Method for producing capacitors and ceramic body therefore
Assignee: NL Industries Inc
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Filing: 1975-02-18
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Granted: 1978-01-31
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Expires: 1995-02-18
Abstract
Abstract A monolithic, multilayer, ceramic capacitor is formed by introducing molten metal into a matrix having thin electrode regions between dielectric strata, through holes, each of which extends through a face of said matrix and provides communication between the outside of said matrix and at least one of said regions, around wires or rods inserted in said holes, thereby providing external leads for said capacitor. A similar process is used to provide internal and external connectors for multilayer, ceramic, circuit boards.
Inventors
- 👤 James A. Stynes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:56
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/228; H01G4/242; H01G4/30; H01G4/302; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49126; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
183 words
A process for forming a multilayer capacitor which comprises: providing a unitary, sintered ceramic matrix comprising a plurality of superposed thin strata of dense dielectric material, said strata being integrally joined around the peripheries thereof to form a monolithic body, major portions of a plurality of said strata being spaced to provide between said spaced portions thin, void electrode regions adapted to be filled with metal, said matrix having a pair of laterally spaced first holes passing through the top or bottom stratum thereof, and second holes aligned with said first-mentioned holes passing through other of said strata to provide access from the exterior of said matrix to said void electrode regions; securing wire leads in said holes with an end of each wire projecting from said body, providing electrodes in said electrode regions by introducing molten metal into said regions through said holes and around said leads and solidifying the metal therein in electrical contact with said leads, said metal having a melting point lower than the temperature employed for sintering said matrix and lower than the melting point of said leads.
Claim 2
Dependent Claim
183 words
A process for forming a multilayer capacitor which comprises: providing a unitary, sintered ceramic matrix comprising a plurality of superposed thin strata of dense dielectric material, said strata being integrally joined around the peripheries thereof to form a monolithic body, major portions of a plurality of said strata being spaced to provide between said spaced portions thin, void electrode regions adapted to be filled with metal, said matrix having a pair of laterally spaced first holes passing through the top or bottom stratum thereof, and second holes aligned with said first-mentioned holes passing through other of said strata to provide access from the exterior of said matrix to said void electrode regions; securing wire leads in said holes with an end of each wire projecting from said body, providing electrodes in said electrode regions by introducing molten metal into said regions through said holes and around said leads and solidifying the metal therein in electrical contact with said leads, said metal having a melting point lower than the temperature employed for sintering said matrix and lower than the melting point of said leads.
Claim 3
Dependent Claim
44 words
A process as set forth in claim 1 in which each of said first holes and the respective holes aligned therewith provide access to one set only of a plurality of sets of electrode regions, each of said sets consisting of alternate electrode regions.
Claim 4
Dependent Claim
49 words
A process as set forth in claim 1 in which there is in each of said electrode regions an island of said dense ceramic material, integral with said adjoining strata and each of said islands is provided with a second hole therethrough aligned with one of said first holes.
Claim 5
Dependent Claim
22 words
A process as set forth in claim 1 in which said void electrode regions have their marginal edges wholly within said matrix.
Claim 6
Dependent Claim
29 words
A process as set forth in claim 1 in which said matrix is supported by one of said leads while molten metal is introduced into said void electrode regions.
Claim 7
Dependent Claim
131 words
A unitary, sintered ceramic body suitable for use in making electrical components having internal conductive layers which comprises: a plurality of superposed thin strata of dense, ceramic, dielectric or insulating material, said strata integrally joined around the peripheries thereof to form a monolithic body, major portions of a plurality of said strata being spaced to provide between said spaced portions thin, void electrode regions adapted to be filled with metal, said body having a pair of laterally spaced holes passing through the top or bottom stratum thereof and holes aligned with said first-mentioned holes, each of said second-mentioned holes passing through at least one other of said strata to provide access from the exterior of said body to said void electrode regions, and a conductor secured in each of said holes.
Claim 8
Dependent Claim
131 words
A unitary, sintered ceramic body suitable for use in making electrical components having internal conductive layers which comprises: a plurality of superposed thin strata of dense, ceramic, dielectric or insulating material, said strata integrally joined around the peripheries thereof to form a monolithic body, major portions of a plurality of said strata being spaced to provide between said spaced portions thin, void electrode regions adapted to be filled with metal, said body having a pair of laterally spaced holes passing through the top or bottom stratum thereof and holes aligned with said first-mentioned holes, each of said second-mentioned holes passing through at least one other of said strata to provide access from the exterior of said body to said void electrode regions, and a conductor secured in each of said holes.
Claim 9
Dependent Claim
35 words
A unitary, sintered ceramic body as defined in claim 6 wherein there is access from any one of said first-mentioned holes to one only of void electrode regions that are immediately adjacent to each other.
Claim 10
Dependent Claim
22 words
A unitary, sintered ceramic body as defined in claim 7 wherein said electrode regions are thinner than the ceramic strata adjacent thereto.
Claim 11
Dependent Claim
48 words
A unitary, sintered ceramic body as defined in claim 6 wherein each of said first-mentioned holes and the holes aligned, respectively, with each provide access to one set only of a plurality of sets of void electrode regions, each of said sets consisting of alternate void electrode regions.
Claim 12
Dependent Claim
30 words
A unitary, sintered ceramic body as defined in claim 6 wherein said thin, void electrode regions have a thickness in the range from about 0.00254 mm to about 0.0254 mm.
Claim 13
Dependent Claim
18 words
A unitary, sintered ceramic body as defined in claim 6 wherein said conductor projects outwardly from said body.
Claim 14
Dependent Claim
18 words
A unitary, sintered ceramic body as defined in claim 7 wherein said conductor projects outwardly from said body.
Claim 15
Dependent Claim
18 words
A unitary, sintered ceramic body as defined in claim 9 wherein said conductor projects outwardly from said body.
Claim 16
Dependent Claim
43 words
A unitary, sintered ceramic body as defined in claim 9 wherein a conducting wire or rod is carried in each of said first-mentioned holes and the holes aligned, respectively, therewith, said wires or rods being slightly smaller in cross section than said holes.
Claim 17
Dependent Claim
24 words
A unitary, sintered ceramic body as defined in claim 14 wherein at least one of said wires or rods projects outwardly from said body.
Claim 18
Dependent Claim
49 words
A unitary, sintered ceramic body as defined in claim 6 wherein there is in each of said electrode regions an island of said dense ceramic material integral with said adjoining strata, and each of said islands is provided with a hole therethrough aligned with one of said first-mentioned holes.
Claim 19
Dependent Claim
22 words
A unitary, sintered ceramic body as defined in claim 6 wherein said electrode regions have their marginal edges wholly within said matrix.
Claim 20
Dependent Claim
31 words
A process as set forth in claim 1 in which said wire leads are secured in said holes in such manner that both ends of each wire project from said body.
Claim 21
Dependent Claim
44 words
A process as set forth in claim 18 in which each of said first holes and the respective holes aligned therewith provide access to one set only of a plurality of sets of electrode regions, each of said sets consisting of alternate electrode regions.
Claim 22
Dependent Claim
49 words
A process as set forth in claim 18 in which there is in each of said electrode regions an island of said dense ceramic material, integral with said adjoining strata and each of said islands is provided with a second hole therethrough aligned with one of said first holes.
Claim 23
Dependent Claim
22 words
A process as set forth in claim 18 in which said void electrode regions have their marginal edges wholly within said matrix.
Claim 24
Dependent Claim
29 words
A process as set forth in claim 18 in which said matrix is supported by one of said leads while molten metal is introduced into said void electrode regions.
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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) | 1981-01-30 | 1981-08-01 | 1982-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-30 | 1985-08-01 | 1986-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-30 | 1989-08-01 | 1990-01-31 | $7700.00 | Window Closed / Lapsed |