US3650826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing metal contacts for mounting semiconductor components in housings
Assignee: Siemens AG
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Filing: 1969-09-26
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Granted: 1972-03-21
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Expires: 1989-09-26
Abstract
Abstract A method for producing metal contact layers for mounting semiconductor components in a housing, particularly those made by the planar technique. The semiconductor component surface to be contacted with the housing is first provided with a layer consisting of aluminum and nickel. Thereafter, a metal layer consisting of titanium is deposited on top of the alloy layer and subsequently thickened by a coating of silver.
Inventors
- 👤 Wolfgang Ganser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:50
CPC Classifications
H; H10; H10P; H10P95/00; H10P95/50; H10D; H10D99/00; H10W; H10W90/00; H10W90/701; H10W90/731; H10W90/736; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12528; Y10T428/12736; Y10T428/12743; Y10T428/12771; Y10T428/12861; Y10T428/12896
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
15 words
The method of claim 1, wherein the aluminum-nickel alloy layer is about 0.5 Mu thick.
Claim 2
Dependent Claim
14 words
The method of claim 2, wherein the titanium layer is about 0.5 Mu thick.
Claim 3
Dependent Claim
14 words
The method of claim 3, wherein the silver coating is about 1 Mu thick.
Claim 4
Dependent Claim
13 words
The method of claim 4, wherein the metal layers are deposited by vaporization.
Claim 5
Dependent Claim
17 words
The method of claim 5, wherein the vaporization process is at a pressure below l0 5 Torr.
Claim 6
Dependent Claim
24 words
The method of claim 6, wherein the aluminum-nickel alloy is metal deposited and the titanium or silver layer is deposited by a galvanic process.
Claim 7
Dependent Claim
24 words
The method of claim 7, which is applied to a planar Zener diode made of P-silicon with an electrical resistivity larger than 0.03 ohm.cm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |