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. 13, 1990
Filed:
Jul. 01, 1988
Applicant:
Inventors:
Patrice Jeudi, La Membrolle, FR;
Christine Anceau, Saint Pierre des Corps, FR;
Assignee:
SGS-Thomson Microelectronics S.A., Gentilly, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 38 ; 357 20 ; 357 39 ;
Abstract
The instant invention relates to protection semiconductive components, thrystors or triacs. Those components do not usually comprise gate electrodes and are triggered by an overvoltage between the main electrodes. When one wishes to obtain however a gate triggering, the invention provides for a structure with a narrowed region of the gate (part D) and an overdoped central region (22) below a portion of the emitter (18). With this structure, one avoids to have a too high gate current to trigger the thyristor and a too low hold current once it is triggered.