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:
Jul. 25, 2006
Filed:
Aug. 26, 2004
John D. Husher, Los Altos Hills, CA (US);
John D. Husher, Los Altos Hills, CA (US);
Micrel, Inc., San Jose, CA (US);
Abstract
An electrostatic discharge (ESD) protection device is disclosed. The ESD protection device comprises a source diffusion in a substrate and a deeper body diffusion in the substrate. The ESD protection device further includes a gate function provided at a space between the source diffusion and the body diffusion surface terminations; and further includes a drain located a predetermined distance from the body diffusion. Finally, the ESD protection device includes a structure for shorting the source and the body diffusion to each other and to ground at variable distances from the channel region, thus providing a programmable variable snap back voltage to provide a protection when an ESD voltage is encountered.