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:
Aug. 01, 2017
Filed:
Jun. 05, 2015
Stmicroelectronics (Tours) Sas, Tours, FR;
Samuel Menard, Tours, FR;
Dalaf Ali, Tours, FR;
STMicroelectronics (Tours) SAS, Tours, FR;
Abstract
A bidirectional switch is formed in a semiconductor substrate of a first conductivity type. The switch includes first and second thyristors connected in antiparallel extending vertically between front and rear surfaces of the substrate. A vertical peripheral wall of the second conductivity type connects the front surface to the rear surface and surrounds the thyristors. On the front surface, in a ring-shaped region of the substrate separating the vertical peripheral wall from the thyristors, a first region of the first conductivity type is provided having a doping level greater than the substrate and having the shape of a ring-shaped band portion partially surrounding the first thyristor and stopping at the level of the adjacent region between the first and second thyristors.