Patent US3665594A successfully refreshed from Google Patents.
US3665594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of joining a body of semiconductor material to a contact or support member
Assignee: Siemens AG
•
Filing: 1969-10-06
•
Granted: 1972-05-30
•
Expires: 1989-10-06
Abstract
Abstract An aluminum coating is applied to a flat surface of a body of semiconductor material. The body having at least two zones or regions of different or opposite type conductivity exposed at the flat surface. A surface of a metal support or contact member which is to be joined to the aluminum coated surface of the semiconductor body is coated with a silicon-aluminum alloy. The two surfaces are then brought together and the surfaces heated to a temperature just above the silicon-aluminum eutectic whereby the body of semiconductor material is joined to support or contact.
Inventors
- 👤 Kurt Raithel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:05
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/20; H10W70/24; H10P; H10P95/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
30 words
The method of claim 1 in which a second coating consisting of silicon is disposed over the silicon aluminum alloy coating prior to disposing the body on the support member.
Claim 2
Dependent Claim
44 words
The method of claim 1 in which the n-type region exposed on the surface of the body of semiconductor material has a coating consisting of an n-type doping material disposed thereon prior to disposing the aluminum coating on the entire surface of the body.
Claim 3
Dependent Claim
21 words
The method of claim 1 in which the silicon-aluminum alloy consists of, by weight, 87 percent aluminum and 13 percent silicon.
Claim 4
Dependent Claim
34 words
The method of claim 1 in which the aluminum coating has a thickness of from 10 to 40 Mu m and the silicon-aluminum coating has a thickness of from 30 to 80 Mu m.
Claim 5
Dependent Claim
23 words
The method of claim 3 in which the coating of n-type doping material has A thickness of from 1 to 2 Mu m.
References Cited (Backward Citations)
US2763822A
Cited
US3228104A
Cited
US3330030A
Cited
US3375143A
Cited
US3382568A
Cited
US3461462A
Cited
US3537174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |