US4281041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hard solderable metal layers on ceramic
Assignee: Evonik Operations GmbH
•
Filing: 1980-02-15
•
Granted: 1981-07-28
•
Expires: 2000-02-15
Abstract
Abstract In order to produce hard solderable metal coatings on a ceramic there is applied to the ceramic base a thin layer of a palladium alloy containing 20-70% of cobalt and/or iron. The coating is preferably applied by vapor deposition or sputtering. The adhesiveness of the coatings is still further improved if there is added to the alloy 3-20% of chromium, manganese and/or titanium.
Inventors
- 👤 Wolfgang Koehler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:07
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; B; B23; B23K; B23K35/00; B23K35/001; B23K35/004; C04B37/00; C04B37/02; C04B37/023; C04B37/026; C04B41/0027; C04B41/45; C04B41/50; C04B41/51; C04B41/5122; C04B41/5144; C04B41/52; C04B41/80; C04B41/81; C04B41/85; C04B41/88; C04B41/89; C23; C23C; C23C14/00; C23C14/02; C23C14/021; C23C14/022; C23C14/024; C23C14/025; C04B2235/00; C04B2235/65; C04B2235/658; C04B2235/6581; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/122; C04B2237/123; C04B2237/125; C04B2237/126; C04B2237/127; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/40; C04B2237/408; C04B2237/50; C04B2237/70; C04B2237/708; C04B2237/72; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
77 words
A product suitable for applying hard solder comprising a ceramic base and a coating on the surface thereof of an alloy consisting essentially of (1) palladium with 20 to 70 weight percent of a member of the group consisting of cobalt, iron and a mixture of cobalt and iron or (2) an alloy containing (1) and an additionally 3 to 20 weight percent of a member of the group consisting of chromium, manganese, titanium and mixtures thereof.
Claim 2
Dependent Claim
77 words
A product suitable for applying hard solder comprising a ceramic base and a coating on the surface thereof of an alloy consisting essentially of (1) palladium with 20 to 70 weight percent of a member of the group consisting of cobalt, iron and a mixture of cobalt and iron or (2) an alloy containing (1) and an additionally 3 to 20 weight percent of a member of the group consisting of chromium, manganese, titanium and mixtures thereof.
Claim 3
Dependent Claim
16 words
A product according to claim 1 wherein the coating has a thickness of 0.2 to 5μ.
Claim 4
Dependent Claim
23 words
A product according to claim 2 wherein the alloy contains 30 to 60% of cobalt, iron or a mixture of cobalt and iron.
Claim 5
Dependent Claim
13 words
A product according to claim 1 wherein the alloy is a palladium-cobalt alloy.
Claim 6
Dependent Claim
13 words
A product according to claim 1 wherein the alloy is a palladium-iron alloy.
Claim 7
Dependent Claim
30 words
A product according to claim 1 wherein the alloy additionally contains 3 to 20 weight percent of a member of the group consisting of chromium, manganese, titanium and mixtures thereof.
Claim 8
Dependent Claim
23 words
A product according to claim 6 wherein the alloy contains 50 weight percent palladium, 40 weight percent cobalt and 10 weight percent chromium.
Claim 9
Dependent Claim
23 words
A product according to claim 6 wherein the alloy contains 46 weight percent palladium, 46 weight percent cobalt and 8 weight percent chromium.
Claim 10
Dependent Claim
34 words
A product according to claim 1 comprising the ceramic base, adhered to said base a layer of chromium and adhered to the chromium an alloy of palladium with cobalt, iron or a mixture thereof.
Claim 11
Dependent Claim
38 words
A product according to claim 1 comprising the ceramic base, adhered to said base a layer of chromium or titanium and adhered to the chromium or titanium the alloy of palladium with cobalt, iron or a mixture thereof.
Claim 12
Dependent Claim
14 words
A product according to claim 1 having hard solder applied to the alloy coating.
Claim 13
Dependent Claim
19 words
The product of claim 6 wherein the alloy layer is applied by vapor deposition in a vacuum or sputtering.
Claim 14
Dependent Claim
17 words
A product according to claim 1 wherein the alloy layer is applied by vapor deposition or sputtering.
Claim 15
Dependent Claim
14 words
A product according to claim 13 wherein the alloy is applied by vapor deposition.
Claim 16
Dependent Claim
13 words
A product according to claim 13 wherein the alloy is applied by sputtering.
Claim 17
Dependent Claim
25 words
A product according to claim 9 wherein the chromium layer has been applied by sputtering the chromium to the ceramic base before applying the alloy.
Claim 18
Dependent Claim
24 words
A product according to claim 9 wherein the chromium layer has been applied by vapor deposition to the ceramic base before applying the alloy.
References Cited (Backward Citations)
US2757104A
Cited
US2799600A
Cited
DE1533234B1
Cited
US3629776A
Cited
US3833410A
Cited
US4046712A
Cited
US4068022A
Cited
DE2523971A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |