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:
Dec. 09, 2025
Filed:
Jul. 17, 2023
Word line-dependent word line and channel read setup time in first read state of non-volatile memory
Sandisk Technologies, Inc., Milpitas, CA (US);
Sandisk Technologies, Inc., Milpitas, CA (US);
Abstract
A memory apparatus and method of operation are provided. The apparatus includes memory cells connected to word lines and disposed in memory holes each comprising a channel. The memory cells retain a threshold voltage and are operable in one of a first read condition in which a word line voltage of the word lines is discharged and a second read condition in which the word line voltage of the word lines is coupled up to a residual voltage level. A control means is configured to apply a predetermined refresh read voltage to the word lines at predetermined intervals of time during a refresh read operation to maintain the memory cells in the second read condition. The control means also adjusts a read setup time in which the word lines are ramped up and the channel is discharged during a read operation based on occurrences of the refresh read operation.