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. 02, 2009
Filed:
Jun. 27, 2007
Ki Seog Kim, Seoul, KR;
Ki Seog Kim, Seoul, KR;
Hynix Semiconductor Inc., Icheon-si, KR;
Abstract
A non-volatile memory device includes a memory cell array at least one block having a plurality of memory cells, and at least one reference cell with respect to each block, an X decoder and a Y decoder for selecting a memory cell for an operation according to an input address, a page buffer for programming data into a memory cell selected by the X decoder and the Y decoder or reading programmed data, and a controller for controlling the memory cell array, the X decoder, the Y decoder and the page buffers to calculate a change in a threshold voltage of the memory cells and compensate for a changed threshold voltage of a memory cell based on a change in a threshold voltage of the reference cell.