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:
Jan. 10, 2017
Filed:
Oct. 09, 2013
Applicant:
National Semiconductor Corporation, Santa Clara, CA (US);
Inventor:
Vladislav Vashchenko, Palo Alto, CA (US);
Assignee:
NATIONAL SEMICONDUCTOR CORPORATION, Santa Clara, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 27/07 (2006.01); H01L 27/02 (2006.01);
U.S. Cl.
CPC ...
H01L 27/0711 (2013.01); H01L 27/0262 (2013.01);
Abstract
In a dual direction ESD protection circuit formed from multiple base-emitter fingers that include a SiGe base region, and a common sub-collector region, the I-V characteristics are adjusted by including P+ regions to define SCR structures that are operable to sink positive and negative ESD pulses, and adjusting the layout and distances between regions and the number of regions.