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.:
Date of Patent:
Mar. 27, 2007
Filed:
Nov. 22, 2004
Applicants:
Joe R. Trogolo, Plano, TX (US);
William Loftin, Plano, TX (US);
William F. Kyser, Jr., Plano, TX (US);
Inventors:
Joe R. Trogolo, Plano, TX (US);
William Loftin, Plano, TX (US);
William F. Kyser, Jr., Plano, TX (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 21/339 (2006.01);
U.S. Cl.
CPC ...
Abstract
An interfacial oxide layer () is formed in the emitter regions of the NPN transistor () and the PNP transistor (). Fluorine is selectively introduced into the polysilicon emitter region of the NPN transistor () to reduce the 1/f noise in the NPN transistor.