US3611064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ohmic contact to n-type silicon carbide, comprising nickel-titanium-gold
Assignee: General Electric Co
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Filing: 1969-07-14
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Granted: 1971-10-05
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Expires: 1989-07-14
Abstract
Abstract A light-emitting silicon carbide diode comprising a chip of SiC containing a PN junction in which ohmic contact is made to the Nside by thin evaporated films of nickel, titanium and gold superposed one on the other and fired to provide a ternary alloy thereof. This allows thermocompression bonding of a gold wire to the excess of gold at the top of the contact. The contact to the P-side may consist of a thin film of evaporated nickel chrome.
Inventors
- 👤 John W Hall
- 👤 William E Tragert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:17
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/83; H10H20/832; H10D; H10D64/00; H10D64/60; H10D64/62; H10H20/81; H10H20/822; H10H20/826
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
46 words
A diode as in claim 1 including a header to which said SiC crystal is attached through its P-side said header including an insulated lead, and a fine gold wire attached to said insulated lead and thermocompression bonded to said small area contact to the N-side.
Claim 2
Dependent Claim
23 words
A diode as in claim 1 having an ohmic contact to the P-region consisting of an evaporated film of nickel-chromium, nickel or chromium.
Claim 3
Dependent Claim
45 words
A diode as in claim 4 including a header to which said SiC crystal is soldered P-side down, said header including an insulated lead, and a fine gold wire attached to said insulated lead and thermocompression bonded to said small area contact to the N-side.
Claim 4
Dependent Claim
23 words
A diode as in claim 1, in which said ternary alloy comprises relatively more gold than each of the nickel and titanium constituents.
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |