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:
Oct. 06, 1992
Filed:
May. 06, 1991
Dan M Mosher, Plano, TX (US);
Cornelia H Blanton, Plano, TX (US);
Joe R Trogolo, Plano, TX (US);
Larry Latham, Garland, TX (US);
David R Cotton, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An integrated circuit is formed on an N-type semiconductor wafer having a first N-type epitaxial layer on the substrate, a P-type epitaxial layer over the first N-type epitaxial layer, and a second N-type epitaxial layer over the P-type epitaxial layer. There are also a plurality of sets of P-type isolation regions separating the P-type epitaxial region and the surface of the second N-type epitaxial region into epitaxial tank regions for formation of bipolar and CMOS devices, combining high power, low power, logic, switching, analog, high current, low current, digital, and linear bipolar transistors along with CMOS transistors. The characteristics of the different type of devices are combined into a single process flow.