US4525387A
Expired / Lapsed
US
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Process for metallizing the surface of a ceramic
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1984-07-13
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Granted: 1985-06-25
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Expires: 2004-07-13
Abstract
Abstract A process for metallizing the surface of a ceramic is provided. The surface of a ceramic is coated with a mixture of SiO2 and at least one copper compound selected from the group consisting of copper carbonate, copper sulfate, copper sulfide, copper oxide, and copper chloride. Thereafter, the film is heated at 900 DEG to 1300 DEG C. in an oxidizing atmosphere to form a baked layer on the surface of the ceramic. The ceramic having the baked layer formed thereon is subjected to a reduction treatment to form a copper-metallized layer on the surface of the ceramic.
Inventors
- 👤 Yoshihiro Ebata
- 👤 Nobuyuki Tamari
- 👤 Yasuo Toibana
- 👤 Ryozo Hayami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:52
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/51; C04B41/5127; C04B41/80; C04B41/81; C04B41/85; C04B41/88
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
98 words
A process for metallizing the surface of a ceramic comprising the steps of coating the surface of the ceramic with a mixture of SiO 2 and at least one copper compound selected from the group consisting of copper carbonate, copper sulfate, copper sulfide, copper oxide and copper chloride, heating the coated ceramic at 900° to 1300° C. in an oxidizing atmosphere to form a baked layer on said surface of the ceramic, and then subjecting the ceramic having the baked layer formed thereon to a reduction treatment to form a copper-metallized layer on said surface of the ceramic.
Claim 2
Dependent Claim
98 words
A process for metallizing the surface of a ceramic comprising the steps of coating the surface of the ceramic with a mixture of SiO 2 and at least one copper compound selected from the group consisting of copper carbonate, copper sulfate, copper sulfide, copper oxide and copper chloride, heating the coated ceramic at 900° to 1300° C. in an oxidizing atmosphere to form a baked layer on said surface of the ceramic, and then subjecting the ceramic having the baked layer formed thereon to a reduction treatment to form a copper-metallized layer on said surface of the ceramic.
Claim 3
Dependent Claim
54 words
A process for metallizing the surface of a ceramic as defined in claim 1, wherein the copper compound is present in an amount of 95 to 50% by weight and SiO 2 is present in an amount of 5 to 50% by weight in the mixture containing the copper compound and SiO 2 .
Claim 4
Dependent Claim
53 words
A process for metallizing the surface of a ceramic as defined in claim 1, wherein the copper compound is present in an amount of 90 to 70% by weight and SiO 2 is present in an amount of 10 to 30% by weight in said mixture containing SiO 2 and the copper compound.
Claim 5
Dependent Claim
29 words
A process for metallizing the surface of a ceramic as defined in claim 1, wherein sodium fluoride is added to the mixture containing SiO 2 and the copper compound.
Claim 6
Dependent Claim
37 words
A process for metallizing the surface of a ceramic as defined in claim 4, wherein the amount of sodium fluoride is 5 to 30% by weight, based on the mixture of SiO 2 and the copper compound.
Claim 7
Dependent Claim
37 words
A process for metallizing the surface of a ceramic as defined in claim 4, wherein the amount of sodium fluoride is 8 to 12% by weight, based on the mixture of SiO 2 and the copper compound.
Claim 8
Dependent Claim
44 words
A process for metallizing the surface of a ceramic as defined in claim 1, wherein the surface of a ceramic is coated by spraying the mixture of SiO 2 and the copper compound in the form of powder over the surface of the ceramic.
Claim 9
Dependent Claim
44 words
A process for metallizing the surface of a ceramic as defined in claim 1, wherein a paste is formed by adding a binder to the mixture of SiO 2 and the copper compound, and the surface of a ceramic is coated with this case.
Claim 10
Dependent Claim
23 words
A process for metallizing the surface of a ceramic as defined in claim 8, wherein the binder is a printing ink or balsam.
Claim 11
Dependent Claim
24 words
A process for metallizing the surface of a ceramic as defined in claim 1, wherein said reduction treatment comprises heating in a reducing atmosphere.
Claim 12
Dependent Claim
36 words
A process for metallizing the surface of a ceramic as defined in claim 1, wherein said reduction treatment comprises immersion, after heating, of the ceramic having the baked layer formed thereon in a reducing organic solvent.
Claim 13
Dependent Claim
23 words
A process for metallizing the surface of a ceramic as defined in claim 10, wherein the heating temperature is 200° to 900° C.
Claim 14
Dependent Claim
23 words
A process for metallizing the surface of a ceramic as defined in claim 11, wherein the heating temperature is 200° to 500° C.
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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) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |