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. 07, 1997
Filed:
Aug. 28, 1995
Yee-Chaung See, Phoenix, AZ (US);
Lewis E Terry, Phoenix, AZ (US);
Craig A Cavins, Pflugerville, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A method of fabricating an integrated circuit (272) having memory, logic, high voltage, and high current functionality uses a modular implant process step (104) to form a drain extension region (204), a source extension region (205), and a base extension region (206) in a substrate (200). The dopants from the modular implant process step (104) are later diffused into the substrate (200) during a LOCOS process step (105). A modular gate oxide formation step (111) produces three different thicknesses of gate oxides (309, 311, 312) which provide ultra high voltage, high voltage, and low voltage functionality for the integrated circuit (272).