US4913932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of a component with a filled layer
Assignee: Siemens AG
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Filing: 1987-08-18
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Granted: 1990-04-03
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Expires: 2007-08-18
Abstract
Abstract The invention relates to a method for the production of a filled layer component made out of a monolithic ceramic body by impregnating a ceramic layer body of dense and porous layers with liquid impregnating material which wets the ceramic and by applying contacts. According to the invention the contacts are applied following the impregnation process without any further intermediate steps, and an electrical bonding of the contacts to the metal filler takes place.
Inventors
- 👤 Thomas Moser
- 👤 Klaus Otto
- 👤 Horst Kippenberg
- 👤 Ralf-Dieter Krause
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:05
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/228; H01G4/232; H01G4/2325; H01G4/30; H01G4/302; H05; H05K; H05K3/00; H05K3/10; H05K3/101; H05K3/40; H05K3/403
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
132 words
A method for the production of a component with filled layers consisting of: impregnating channels inside of a sinter-ceramic body of dense and porous layers with a liquid metallic impregnating material which in a liquid state is capable of wetting the sinter-ceramic body, applying electrical contacts onto the outside of the sinter-ceramic body after impregnation of the inside channels by the metallic material, and effecting electrical bonding of the contacts to the metallic impregnating material, wherein the impregnating material is a lead-indium alloy having an indium content which is between about 2.5% to about 20% by weight and wherein the impregnating material is prevented from running out of the inside channels of the sinter-ceramic body after impregnation without applying a pre-coating on the outer surface of the sinter-ceramic body prior to impregnation.
Claim 2
Independent Claim
132 words
A method for the production of a component with filled layers consisting of: impregnating channels inside of a sinter-ceramic body of dense and porous layers with a liquid metallic impregnating material which in a liquid state is capable of wetting the sinter-ceramic body, applying electrical contacts onto the outside of the sinter-ceramic body after impregnation of the inside channels by the metallic material, and effecting electrical bonding of the contacts to the metallic impregnating material, wherein the impregnating material is a lead-indium alloy having an indium content which is between about 2.5% to about 20% by weight and wherein the impregnating material is prevented from running out of the inside channels of the sinter-ceramic body after impregnation without applying a pre-coating on the outer surface of the sinter-ceramic body prior to impregnation.
Claim 3
Dependent Claim
40 words
A method according to claim 1, wherein the impregnating material is an alloy having a melting point lower than the melting point of the contacts and higher than the soldering temperature employed in the use of the component as intended.
Claim 4
Dependent Claim
26 words
A method according to claim 2, wherein the melting point of the impregnating material is greater than about 180° C. and less than about 850° C.
Claim 5
Dependent Claim
19 words
A method according to claim 1, wherein the contacts are applied after the impregnation process by a metallization technique.
Claim 6
Dependent Claim
26 words
A method of claim 4, wherein the metallization technique is selected from the group consisting of applying a metal containing paste and sputtering of metallic materials.
Claim 7
Independent Claim
32 words
A method as in any one of the preceding claims, wherein the bonding of the impregnating metal filler to the contacts subsequently applied on the ceramic body occurs by a heat treatment.
Claim 8
Dependent Claim
20 words
A method according to claim 6, wherein the heat treatment is carried out simultaneously with the application of the contacts.
Claim 9
Dependent Claim
22 words
A method according to claim 6, wherein the heat treatment occurs in a separate process step following the application of the contacts.
Claim 10
Dependent Claim
32 words
A method according to claim 6 wherein the temperature for bonding the impregnating metal filler to the contacts is at least in part greater than the melting point of the impregnating material.
Claim 11
Dependent Claim
32 words
A method according to claim 7, wherein the temperature for bonding the impregnating metal filler to the contacts is at least in part greater than the melting point of the impregnating material.
Claim 12
Dependent Claim
32 words
A method according to claim 8, wherein the temperature for bonding the impregnating metal filler to the contacts is at least in part greater than the melting point of the impregnating material.
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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) | 1993-04-02 | 1993-10-02 | 1994-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-02 | 1997-10-02 | 1998-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-02 | 2001-10-02 | 2002-04-03 | $7700.00 | Window Closed / Lapsed |