Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Sook Kyung Kim0
Kyung Pil Hwang0
Min Kyu Lee0
Seok Jin Joo0
Hyung Seok Kim0
Ju In Kim0
Keum Hwan Noh0
Date of Patent
July 12, 2011
0Patent Application Number
124249840
Date Filed
April 16, 2009
0Patent Primary Examiner
Patent abstract
Erase and program methods of a flash memory device including MLCs for increasing the program speed. In the erase method, MLCs are pre-programmed so that a voltage range in which threshold voltages of MLCs are distributed can be reduced. Therefore, a fail occurrence ratio can be reduced when erasing MLCs, the threshold voltage distribution of MLCs can be improved and an overall program time can be shortened in a subsequent program operation.
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