US5210431A
Expired / Lapsed
US
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Ohmic connection electrodes for p-type semiconductor diamonds
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1992-02-07
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Granted: 1993-05-11
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Expires: 2012-02-07
Abstract
Abstract In an ohmic contact electrode for the p-type semiconductor diamond, the electrode is formed of metals or metallic compounds containing boron on a p-type semiconductor diamond, so as to obtain a decreased contact resistance.
Inventors
- 👤 Tunenobu Kimoto
- 👤 Tadashi Tomikawa
- 👤 Shoji Nakagama
- 👤 Masayuki Ishii
- 👤 Nobuhiko Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:09
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/80; H10D62/83; H10D62/8303; H10D64/00; H10D64/01; H10D64/011; H10D64/0111; H10D64/0114; H10D64/60; H10D64/62
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
54 words
An ohmic contact electrode for a p-type semiconductor consisting essentially of: a p-type semiconductor diamond substrate; and a metal or metallic compound selected from the group consisting of: Au, Pt, Al, Ag, Ni, Ta, Cs, Zr, TiSi 2 , and containing at least 0.01% and not more than 10% boron formed on said substrate.
Claim 2
Dependent Claim
54 words
An ohmic contact electrode for a p-type semiconductor consisting essentially of: a p-type semiconductor diamond substrate; and a metal or metallic compound selected from the group consisting of: Au, Pt, Al, Ag, Ni, Ta, Cs, Zr, TiSi 2 , and containing at least 0.01% and not more than 10% boron formed on said substrate.
Claim 3
Dependent Claim
21 words
The electrode according to claim 1, wherein annealing or forming of the electrode is carried out at 300° to 1000° C.
Claim 4
Dependent Claim
26 words
The electrode according to claim 2, wherein the forming or annealing of the electrode is carried out at 600° to 1000° C. in a non-oxidizing atmosphere.
References Cited (Backward Citations)
US2829993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-10 | 1996-11-09 | 1997-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-10 | 2000-11-09 | 2001-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-10 | 2004-11-09 | 2005-05-11 | $7700.00 | Window Closed / Lapsed |