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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11588019 B1

PDFFull Text
Date of Patent:
Feb. 21, 2023

Filed:

Dec. 02, 2021

Bipolar junction transistor with constricted collector region having high gain and early voltage product

Applicant:

Texas Instruments Incorporated, Dallas, TX (US);

Inventors:

Alexei Sadovnikov, Sunnyvale, CA (US);

Natalia Lavrovskaya, Sunnyvale, CA (US);

Assignee:

Texas Instruments Incorporated, Dallas, TX (US);

Attorneys:

Jacqueline J. Garner

Frank D. Cimino

Primary Examiner:

Sheikh Maruf

Int. Cl.
CPC ...
H01L 29/08 (2006.01); H01L 21/82 (2006.01); H01L 29/732 (2006.01); H01L 29/10 (2006.01); H01L 29/66 (2006.01); H01L 27/06 (2006.01); H01L 21/8249 (2006.01); H01L 21/265 (2006.01); H01L 21/266 (2006.01); H01L 29/36 (2006.01);
U.S. Cl.
CPC ...
H01L 29/0821 (2013.01); H01L 21/266 (2013.01); H01L 21/26513 (2013.01); H01L 21/8249 (2013.01); H01L 27/0623 (2013.01); H01L 29/0804 (2013.01); H01L 29/1004 (2013.01); H01L 29/36 (2013.01); H01L 29/66272 (2013.01); H01L 29/732 (2013.01);
Abstract

A semiconductor device includes a bipolar junction transistor having a collector, a base, and an emitter. The collector includes a current collection region, a constriction region laterally adjacent to the current collection region, and a contact region laterally adjacent to the constriction region, located opposite from the current collection region. The current collection region, the constriction region laterally, and the contact region all have the same conductivity type. The base includes a current transmission region contacting the current collection region and a constricting well laterally adjacent to, and contacting, the current transmission region and contacting the constriction region. The current transmission region and the constricting well have an opposite conductivity type than the current collection region, the constriction region laterally, and the contact region.

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