US3590339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gate controlled switch transistor drive integrated circuit (thytran)
Assignee: Westinghouse Electric Corp
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Filing: 1970-01-30
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Granted: 1971-06-29
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Expires: 1990-01-30
Abstract
Abstract A body of semiconductor material comprises a controlled rectifier switch and a transistor each sharing a common anode. The controlled rectifier provides the base drive which is necessary to keep the transistor in an ''''on'''' condition. Once operating, the transistor functionally does not see the controlled rectifier in the electrical circuit. When it is desired to shut off the transistor, the necessary signal is sent to the gate region of the controlled rectifier and the rectifier is turned off thereby removing the base drive from the base region of the transistor which in turn turns all of the regions of the transistor off substantially simultaneously. This type of device is designated by the term ''''THYTRAN.
Inventors
- 👤 William J Bilo
- 👤 John W Motto Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:59
CPC Classifications
H; H10; H10D; H10D88/00; H10D84/00; H10D84/101; H10D84/121; H10W; H10W20/00; H10W20/40; H10W20/482; H10W20/484; H10W72/00; H10W72/90; H10W72/50; H10W72/531; H10W72/536; H10W72/541; H10W72/5453; H10W72/59
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
30 words
The electrical device of claim 1 wherein said electrically conductive connection and said second and said third electrical contacts are integral with each other and form a unitary electrical contact.
Claim 2
Dependent Claim
42 words
The electrical device of claim 1 wherein portions of said second region comprise alloyed and recrystallized pOrtions and said first, said second, said third, and said fourth electrical contacts are each affixed to the alloyed and recrystallized portion of said second region.
Claim 3
Dependent Claim
77 words
The semiconductor device of claim 2 including a layer of an electrically insulating material disposed on at least that portion of the top surface of said body between said second and said third electrical contact portions of said unitary electrical contact including an end portion of that PN junction formed between said first portion of said first region and said second portion of said second region exposed in said at least that portion of the top surface.
Claim 4
Dependent Claim
26 words
The electrical device of claim 1 wherein said electrically conductive connection is in a pressure electrical contact relationship with said second and said third electrical contacts.
Claim 5
Dependent Claim
20 words
The electrical device of claim 5 wherein said electrically conductive connection comprises an electrically conductive metal having a predetermined resistivity.
Claim 6
Dependent Claim
21 words
The electrical device of claim 6 wherein said electrically conductive connection comprises an electrically conductive ceramic body having a predetermined resistivity.
Claim 7
Dependent Claim
168 words
The electrical device of claim 5 including a sixth electrical contact in a pressure electrical contact relationship with said fourth electrical contact, said sixth electrical contact having a top surface, a bottom surface, an axially disposed recess formed in the bottom surface and extending radially outwardly from the center of the sixth electrical contact and having a third surface substantially parallel to and intermediate of said top and bottom surfaces, sidewalls extending from said third surface to said bottom surface, and an axially disposed aperture extending through said sixth contact from said top surface to said third surface of said recess; and said electrically conductive connection is disposed about the aperture of said sixth contact within said recess and electrically insulated from said sixth electrical contact by a layer of electrically insulating material whereby said sixth electrical contact acts on said electrically insulating material and said electrically conductive connection to urge said electrically conductive connection into the pressure electrical contact relationship with said second and said third contacts.
Claim 8
Dependent Claim
61 words
The semiconductive device of claim 8 including an electrical lead extending axially downwardly through the aperture of said sixth electrical contact, through an axially disposed aperture extending entirely through said layer of electrically insulating material, through an axially disposed aperture extending entirely through said electrically conductive connection to electrically connect with said first electrical contact in a pressure electrical contact relationship.
Claim 9
Dependent Claim
44 words
The semiconductor device of claim 9 wherein said layer of electrically insulating material has an axially disposed boss which protrudes downwardly through the aperture of said electrically conductive connector, the aperture of said layer of electrically insulating material being axially disposed within the boss.
Claim 10
Dependent Claim
44 words
The semiconductor device of claim 10 wherein said layer of electrically insulating material has an outer peripheral portion which encloses the outer peripheral surface of said electrically conductive connection whereby said electrically conductive connection is disposed in a recess formed within the insulating material.
Claim 11
Dependent Claim
25 words
The electrical device of claim 11 wherein said layer of electrically insulating material comprises a material selected from the group consisting of polytetrafluoroethylene and trifluoromonochloroethylene.
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |