US3630767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for providing contacts on a semiconductor body
Assignee: Robert Bosch GmbH
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Filing: 1969-11-26
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Granted: 1971-12-28
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Expires: 1989-11-26
Abstract
Abstract Contacts on a semiconductor body are formed by depositing a nickel coating through reduction of a nickel salt with sodium hypophosphite, followed by treating the semiconductor with a solvent for elemental yellow phosphorus to remove phosphorus from the contact area.
Inventors
- 👤 Hans Linstedt
- 👤 Siegfried Bellon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:26
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/40; H10P14/46; D; D01; D01H; D01H7/00; D01H7/92; D01H7/923; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
40 words
The process of claim 1, which includes the step of immersing the semiconductor body or at least the contact area thereof subsequent to said solvent treatment in benzene or a benzene derivative having a boiling point above that of benzene.
Claim 2
Dependent Claim
16 words
The process of claim 2, wherein the benzene derivative is o-xylene, toluene, mesitylene, cumene or p-cymene.
Claim 3
Dependent Claim
30 words
The process of claim 2, which includes the step of rinsing the semiconductor body in a solvent for phosphorus oxides following said immersion in boiling benzene or a benzene derivative.
Claim 4
Dependent Claim
16 words
The process of claim 4, wherein the rinsing is effected in xylene, alcohol, water or ammonia.
Claim 5
Dependent Claim
25 words
The process of claim 1, which includes the step of rinsing the semiconductor in a solvent for phosphorus following said solution treatment for elemental phosphorus.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |