Patent US3758832A successfully refreshed from Google Patents.
US3758832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thyristor with short circuiting ring
Assignee: Siemens AG
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Filing: 1972-02-17
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Granted: 1973-09-11
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Expires: 1992-02-17
Abstract
Abstract The known short-circuiting ring is situated entirely under the emitter electrode. As the electrode cannot be brought up to the edge of the semiconductor body because of the disturbances caused by finishing operations in the edge region, such as beveling, etching, etc., effective emitter area is lost. According to the invention, the short-circuiting ring is placed into the edge region and is connected to the electrode by parts of the base zone extending through cutouts in the emitter zone.
Inventors
- 👤 K Platzoder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:15
CPC Classifications
H; H10; H10D; H10D64/00; H10D64/20; H10D64/23; H10D64/233; H10D62/00; H10D62/10; H10D62/13; H10D62/141; H10D62/148; H10D99/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
133 words
A semiconductor component comprising a conductor body having at least four zones of alternating conduction type and at least three pn junctions, a first zone on the surface of the component and a second zone, part of said second zone extending through said firsT zone to the surface of the component so as to form a short-circuiting ring, said short-circuiting ring surrounding part of said first zone, a conducting cover coating on said first zone, a plurality of open recesses formed in the outer edge portion of said part of first zone and opening in a direction facing said short-circuiting ring of said second zone, said second zone having portions penetrating into said recesses and extending to said conducting cover to provide an electrical connection between said conducting cover and said second zone.
Claim 2
Dependent Claim
133 words
A semiconductor component comprising a conductor body having at least four zones of alternating conduction type and at least three pn junctions, a first zone on the surface of the component and a second zone, part of said second zone extending through said firsT zone to the surface of the component so as to form a short-circuiting ring, said short-circuiting ring surrounding part of said first zone, a conducting cover coating on said first zone, a plurality of open recesses formed in the outer edge portion of said part of first zone and opening in a direction facing said short-circuiting ring of said second zone, said second zone having portions penetrating into said recesses and extending to said conducting cover to provide an electrical connection between said conducting cover and said second zone.
Claim 3
Dependent Claim
22 words
The semiconductor component of claim 1, wherein the recesses are distributed uniformly over the circumference of said part of said first zone.
Claim 4
Dependent Claim
23 words
The semiconductor component of claim 2, wherein the first zone has further cutouts through which the second zone extends to the conducting coating.
Claim 5
Dependent Claim
17 words
The semiconductor component of claim 3, wherein the zones of the semiconductor body are prepared by diffusion.
Claim 6
Dependent Claim
15 words
The semiconductor component of claim 2, wherein the recesses are made by a photoresist technique.
References Cited (Backward Citations)
US3409811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |