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. 16, 2010
Filed:
Dec. 29, 2008
Suyoun Lee, Gyeonggi-do, KR;
Byung-ki Cheong, Seoul, KR;
Jeung-hyun Jeong, Seoul, KR;
Taek Sung Lee, Seoul, KR;
Won Mok Kim, Seoul, KR;
Suyoun Lee, Gyeonggi-do, KR;
Byung-ki Cheong, Seoul, KR;
Jeung-hyun Jeong, Seoul, KR;
Taek Sung Lee, Seoul, KR;
Won Mok Kim, Seoul, KR;
Korea Institute of Science and Technology, Seoul, KR;
Abstract
A phase change memory apparatus includes a phase change memory array in which a plurality of phase change memory devices are arranged, and a pulse generator that supplies a writing current pulse, an erasure current pulse, and a reverse repair current pulse to the phase change memory devices in the phase change memory array. The reverse repair current pulse has opposite direction to the writing current pulse and the erasure current pulse of the phase change memory devices, and is of such a size that resultant Joule heat and electromigration move the elements of the reverse repair current pulse. The reverse repair current pulse has a width equal to or more than a smaller one of duration of a normal writing operation and duration of a normal erasure operation.