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:
Mar. 01, 1994
Filed:
Jul. 26, 1991
William J Boardman, San Jose, CA (US);
David P Chan, San Ramon, CA (US);
Kuang-Yeh Chang, Los Gatos, CA (US);
Calvin T Gabriel, Pacifica, CA (US);
Vivek Jain, Milpitas, CA (US);
Subhash R Nariani, San Jose, CA (US);
VLSI Technology, Inc., San Jose, CA (US);
Abstract
An anti-fuse structure characterized by a substrate, an oxide layer formed over the substrate having an opening formed therein, an amorphous silicon material disposed within the opening and contacting the substrate, a conductive protective material, such as titanium tungsten, disposed over the amorphous silicon material, and oxide spacers lining the walls of a recess formed within the protective material. The protective material and the spacers provide tighter programming voltage distributions for the anti-fuse structure and help prevent anti-fuse failure.