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:
Jun. 14, 2016
Filed:
Feb. 13, 2015
Applicant:
Allegro Microsystems, Llc, Worcester, MA (US);
Inventors:
Assignee:
Allegro Microsystems, LLC, Worcester, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 29/66 (2006.01); H01L 27/02 (2006.01);
U.S. Cl.
CPC ...
H01L 27/0262 (2013.01);
Abstract
In one aspect, a direct connected silicon control rectifier (DCSCR) includes a substrate having a semiconductor surface, a parasitic PNP bipolar transistor and a parasitic NPN bipolar transistor formed in the semiconductor surface. The parasitic PNP bipolar transistor includes a p+ emitter, an nbase and a pcollector and the parasitic NPN bipolar includes an n+ emitter, a pbase and an ncollector. The DCSCR also includes an electrically conductive line connecting an n+ contact to the nbase to a p+ contact to the pbase so that the nbase and the pbase are shorted.