US4825272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor power switch with thyristor
Assignee: Siemens AG
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Filing: 1987-09-17
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Granted: 1989-04-25
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Expires: 2007-09-17
Abstract
Abstract A power switch device comprises an asymmetrically blocking thyristor (ASCR), with which a diode is connected in series. The ASCR as well as the diode require only about one half the central zone thickness as compared with a symmetrically blocking thyristor laid out for the same blocking voltage in reverse direction (U RRM ). For the series connection of the ASCR and diode, this results in a much lower blocking delay charge (Q rr ).
Inventors
- 👤 Erhard Lehmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:36
CPC Classifications
H; H10; H10W; H10W90/00; H10D; H10D84/00; H10D84/60; H10W90/701; H10W90/731; H10W90/732
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
78 words
A semiconductor power switch device comprising: an asymmetrically blocking thyristor having four zones with alternating conductivity type, such that a relatively heavily n-doped layer is interposed between a p-doped outer zone and a relatively lightly n-doped zone; and a first diode coupled in series with said asymmetrically blocking thyristor, said diode having a predetermined structure such that the reverse recovery charge stored therein is the same as or greater than the reverse recovery charge stored in said thyristor.
Claim 2
Dependent Claim
78 words
A semiconductor power switch device comprising: an asymmetrically blocking thyristor having four zones with alternating conductivity type, such that a relatively heavily n-doped layer is interposed between a p-doped outer zone and a relatively lightly n-doped zone; and a first diode coupled in series with said asymmetrically blocking thyristor, said diode having a predetermined structure such that the reverse recovery charge stored therein is the same as or greater than the reverse recovery charge stored in said thyristor.
Claim 3
Dependent Claim
20 words
A semiconductor power switch device according to claim 1, further comprising an auxiliary diode being connected antiparallel with said thyristor.
Claim 4
Dependent Claim
22 words
A semiconductor power switch device according to claim 1, wherein said auxiliary diode is integrated into a semiconductor body of said thyristor.
Claim 5
Dependent Claim
22 words
A semiconductor power switch device according to claim 2, wherein said auxiliary diode is integrated into the semiconductor body of said thyristor.
Claim 6
Dependent Claim
31 words
A semiconductor power switch device according to claim 2, wherein said first diode has a predetermined structure so that a greater reverse recovery charge is stored therein than in said thyristor.
Claim 7
Dependent Claim
31 words
A semiconductor power switch device according to claim 3, wherein said first diode has a predetermined structure so that a greater reverse recovery charge is stored therein than in said thyristor.
Claim 8
Dependent Claim
63 words
A semiconductor power switch device according to claim 1, wherein semiconductor bodies of said thyristor and said diode are alloyed together such that the anode side of said semiconductor body of said thyristor is contiguous to the cathode side of said semiconductor body of said diode, and a support plate is alloyed on the anode side of said semiconductor body of said diode.
Claim 9
Dependent Claim
63 words
A semiconductor power switch device according to claim 2, wherein semiconductor bodies of said thyristor and said diode are alloyed together such that the anode side of said semiconductor body of said thyristor is contiguous to the cathode side of said semiconductor body of said diode, and a support plate is alloyed on the anode side of said semiconductor body of said diode.
Claim 10
Dependent Claim
63 words
A semiconductor power switch device according to claim 3, wherein semiconductor bodies of the thyristor and the diode are alloyed together such that the anode side of said semiconductor body of said thyristor is contiguous to the cathode side of said semiconductor body of said diode, and a support plate is alloyed on the anode side of said semiconductor body of said diode.
Claim 11
Dependent Claim
63 words
A semiconductor power switch device according to claim 4, wherein semiconductor bodies of the thyristor and the diode are alloyed together such that the anode side of said semiconductor body of said thyristor is contiguous to the cathode side of said semiconductor body of said diode, and a support plate is alloyed on the anode side of said semiconductor body of said diode.
Claim 12
Dependent Claim
50 words
A semiconductor power switch device according to claim 1, wherein a semiconductor body of the thyristor is alloyed on the anode side onto one side of a support plate, and a semiconductor body of said diode is alloyed on the cathode side onto the other side of said support plate.
Claim 13
Dependent Claim
51 words
A semiconductor power switch device according to claim 2, wherein a semiconductor body of said thyristor is alloyed on the anode side onto one side of a support plate, and a semiconductor body of said first diode is alloyed on the cathode side onto the other side of said support plate.
Claim 14
Dependent Claim
50 words
A semiconductor power switch according to claim 3, wherein the semiconductor body of said thyristor is alloyed on the anode side onto one side of a support plate, and a semiconductor body of said first diode is alloyed on the cathode side onto the other side of said support plate.
Claim 15
Dependent Claim
50 words
A semiconductor power switch according to claim 4, wherein the semiconductor body of said thyristor is alloyed on the anode side onto one side of a support plate, and the semiconductor body of said first diode is alloyed on the cathode side onto the other side of said support plate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |