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. 17, 2008
Filed:
Apr. 26, 2006
Vladislav Vashchenko, Palo Alto, CA (US);
Peter J. Hopper, San Jose, CA (US);
Ann Concannon, Palo Alto, CA (US);
Marcel Ter Beek, Pleasanton, CA (US);
Vladislav Vashchenko, Palo Alto, CA (US);
Peter J. Hopper, San Jose, CA (US);
Ann Concannon, Palo Alto, CA (US);
Marcel Ter Beek, Pleasanton, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
When a high-voltage, such as from an ESD pulse, is placed across a silicon controlled rectifier, which includes an NPN transistor and a PNP transistor that is connected to the NPN transistor, the likelihood of punch through occurring between two regions of the rectifier is substantially reduced by forming the collector of the NPN transistor between the emitter and collector of the PNP transistor.