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:
Jun. 26, 2012
Filed:
Jun. 23, 2010
Applicants:
Dong-hyuk Lee, Seoul, KR;
Jung-bae Lee, yongin-si, KR;
Doo-gon Kim, Hwaseong-si, KW;
Cheol Kim, Seoul, KR;
Inventors:
Dong-Hyuk Lee, Seoul, KR;
Jung-Bae Lee, yongin-si, KR;
Doo-Gon Kim, Hwaseong-si, KW;
Cheol Kim, Seoul, KR;
Assignee:
Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A semiconductor memory device includes a cell array unit having a plurality of banks each having a plurality of blocks, and a refresh controller configured to set at least one of the blocks as a test block, perform a refresh operation on the blocks except for the test block in a self-refresh operation period, determine a refresh period of the test block, and then set another one of the blocks as the test block.