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:
May. 11, 2004
Filed:
Jul. 02, 2002
Juergen T. Rickes, Cupertino, CA (US);
Hugh P. McAdams, McKinney, TX (US);
James W. Grace, Los Altos Hills, CA (US);
John Y. Fong, Sunnyvale, CA (US);
Ralph H. Lanham, Cupertino, CA (US);
Other;
Abstract
A memory such as a FeRAM implements accelerated fatigue operations that simultaneously change the storage state of large numbers of memory cells and can be rapidly repeated. In one embodiment, the FeRAM includes multiple segments with plate lines in each segment being isolated from plate lines in other segments. A first fatigue operation uses standard read/write decoding for word lines but simultaneously activates all segments. A second fatigue operation activates all segments and all plate lines and exercises one row of memory cells in each plate line group. A third fatigue operation is similar to the second but cycles through rows in the plate line groups so that a number of repetitions of the third fatigue operation equally fatigue every FeRAM cell.