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. 10, 2011
Filed:
Dec. 30, 2008
Patrick Wu, San Jose, CA (US);
Richard Fackenthal, Carmichael, CA (US);
Ferdinando Bedeschi, Monza, IT;
Meenatchi Jagasivamani, Folsom, CA (US);
Enzo Michele Donze, San Giuseppe Jato, IT;
Patrick Wu, San Jose, CA (US);
Richard Fackenthal, Carmichael, CA (US);
Ferdinando Bedeschi, Monza, IT;
Meenatchi Jagasivamani, Folsom, CA (US);
Enzo Michele Donze, San Giuseppe Jato, IT;
STMicroelectronics S.r.l., Agrate Brianza, IT;
Abstract
A phase change memory includes a float buffer which stores the result of a comparison between the current state of data in the phase change memory cells and an intended next state of each of those cells. The float buffer indicates which cells need to be programmed in order to achieve the new states and which cells happen to already be in the new states. Then, after programming of the cells, the float buffer indicates which cells still need to be programmed. Thus, a control stage uses the information in the float buffer to program only those cells whose states need to be changed.