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:
Feb. 09, 2016
Filed:
Feb. 04, 2014
Stmicroelectronics (Tours) Sas, Tours, FR;
Aurelie Arnaud, Saint-Cyr-sur-Loire, FR;
STMicroelectronics (Tours) SAS, Tours, FR;
Abstract
An overvoltage protection device including: a doped substrate of a first conductivity type having a first doping level, coated with a doped epitaxial layer of the second conductivity type having a second doping level; a first doped buried region of the second conductivity type having a third doping level greater than the second level, located at the interface between the substrate and the epitaxial layer in a first portion of the device; and a second doped buried region of the first conductivity type having a fourth doping level greater than the first level, located at the interface between the substrate and the epitaxial layer in a second portion of the device.