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:
Aug. 20, 2013
Filed:
Dec. 30, 2010
Byoung Kwan Jeong, Gyeonggi-do, KR;
Byoung Kwan Jeong, Gyeonggi-do, KR;
Hynix Semiconductor Inc., Gyeonggi-do, KR;
Abstract
A method for operating a semiconductor memory device includes the steps of: erasing memory cells of a memory block to set the memory cells in a first erased state, programming a part of the memory cells of the memory block to convert them into a programmed state, raising threshold voltages of selected memory cells of the memory block and converting the selected memory cells from the programmed state to a second erased state, and reading data from the memory cells in the first erased state, the programmed state, and the second erased state, and outputting the data read from the memory cells in the first and second erased states with the same value.