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. 11, 2005
Filed:
May. 12, 2003
Vladislav Vashchenko, Palo Alto, CA (US);
Ann Concannon, San Jose, CA (US);
Peter J. Hopper, San Jose, CA (US);
Marcel Ter Beek, Pleasanton, CA (US);
Vladislav Vashchenko, Palo Alto, CA (US);
Ann Concannon, San Jose, CA (US);
Peter J. Hopper, San Jose, CA (US);
Marcel ter Beek, Pleasanton, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
In a BSCR and method of making a BSCR, a npn BJT structure is created and a p+ region is provided that is connected to the collector of the BJT, and one or more of the NBL, sinker and n+ collector of the BJT are partially blocked. In this way the NBL is formed into a comb-like NBL with a plurality of tines in one embodiment. The sinker and n+ collector may also be formed into a plurality islands. Furthermore, the period of the tines and islands may be varied to provide the desired BSCR characteristics.