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:
Nov. 12, 2024
Filed:
Nov. 03, 2021
SK Hynix Inc., Icheon-si, KR;
Hee Youl Lee, Icheon-si, KR;
SK hynix Inc., Icheon-si, KR;
Abstract
A method of operating a semiconductor memory device includes a plurality of program loops for programming selected memory cells among a plurality of memory cells. Each of the plurality of program loops includes setting a state of a bit line connected to the selected memory cells, applying a program voltage to a word line connected to the selected memory cells, and performing a verify operation on the selected memory cells using a first pre-verify voltage, a second pre-verify voltage greater than the first pre-verify voltage, and a main verify voltage greater than the second pre-verify voltage. A first program permission cell, a second program permission cell, a third program permission cell, and a program prohibition cell are determined by performing the verify operation.