US3138747A Expired / Lapsed US ⏱️ 0.0 years remaining

Integrated semiconductor circuit device

Assignee: Texas Instruments Inc

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Filing: 1959-02-12

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Granted: 1964-06-23

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Expires: 1979-02-12

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Abstract

Abstract 945,749. Semi-conductor devices. TEXAS INSTRUMENTS Inc. Feb. 2, 1960 [Feb. 6, 1959], No. 32744/63. Divided out of 945,734. Heading H1K. The subject matter of this Specification is included in Specification 945,734 from which the present Specification is divided but the claims relate to a device comprising a semi-conductor body with three superposed regions of alternate conductivity types forming a pair of PN junctions extending to a surface of the body and there defining two enclosed areas one within the other, with an insulating oxide of a semi-conductor covering selected parts of said surface, first and second ohmic contacts secured to said surface on opposite sides of the inner PN junction and a third ohmic contact secured to the third region. Specifications 945,737, 945,738, 945,739, 945,740, 945,741, 945,742, 945,743, 945,744, 945,745, 945,746, 945,747 and 945,748 also are referred to.

Inventors

👤 Richard F Stewart

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-10-27 06:35

CPC Classifications

H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/286; H10; H10D; H10D1/00; H10D1/40; H10D1/43; H10D1/60; H10D1/62; H10D1/64; H10D1/66; H10D84/00; H10D84/01; H10D84/0112; H10D84/0123; H10D84/0126; H10D84/0158; H10D84/02; H10D84/03; H10D84/038; H10D84/201; H10D84/204; H10D84/60; H10D84/611; H10D84/613; H10D99/00; H10P; H10P10/00; H10P14/00; H10P14/60; H10P14/63; H10P14/6302; H10P14/6304; H10P14/6306; H10P14/6308; H10P14/6309; H10P50/00; H10P50/60; H10P50/61; H10P50/613; H10P76/00; H10P76/40; H10P95/00; H10W; H10W10/00; H10W10/01; H10W10/031; H10W10/30; H10W20/00; H10W20/40; H10W20/497; H10W74/00; H10W74/40; H10W74/43; H10W72/00; H10W72/071; H10W72/075; H10W72/07551; H10W72/07554; H10W72/50; H10W72/531; H10W72/536; H10W72/541; H10W72/547; H10W72/5473; H10W72/551; H10W72/552; H10W72/5522; Y; Y10; Y10S; Y10S438/00; Y10S438/98

Claims Analysis

Total Claims: 2

Claim 1

Independent Claim 134 words

A SEMICONDUCTOR DEVICE COMPRISING AN EMITTER LAYER, A BASE LAYER, AND A COLLECTOR LAYER, A PLURALITY OF BASE LAYER CONTACTS PASSING THROUGH SAID EMITTER LAYER, SAID BASE LAYER HAVING SUFFICIENT SHEET RESISTANCE TO MAKE THE OPERATION OF EACH OF SAID BASE CONTACTS SUBSTANTIALLY INDEPENDENT OF EACH OTHER, A PORTION OF SAID EMITTER AND BASE LAYERS CUT AWAY TO EXPOSE AN ADDITIONAL SURFACE ON SAID COLLECTOR LAYER, A FIRST COLLECTOR CONTACT ON SAID ADDITIONAL SURFACE, A SECOND COLLECTOR CONTACT ON THE SURFACE OPPOSITE SAID ADDITIONAL SURFACE, SAID COLLECTOR LAYER HAVING A SHAPE THAT THE CONDUCTIVE PATH FROM THE BOUNDARY BETWEEN SAID BASE LAYER AND SAID COLLECTOR LAYER THROUGH SAID COLLECTOR LAYER TO SAID SECOND COLLECTOR CONTACT IS SUBSTANTIALLY GREATER THAN THE CONDUCTIVE PATH FROM SAID BOUNDARY THROUGH SAID COLLECTOR LAYER TO SAID FIRST COLLECTOR CONTACT.

Claim 2

Dependent Claim 134 words

References Cited (Backward Citations)

US2845372A Cited

US2831787A Cited

US2889469A Cited

US2866140A Cited

US2870050A Cited

US3007091A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1967-06-23	1967-12-23	1968-06-23	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1971-06-23	1971-12-23	1972-06-23	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1975-06-23	1975-12-23	1976-06-23	$7700.00	Window Closed / Lapsed

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