Invention Grant
- Patent Title: Program verify adaptation for flash memory
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Application No.: US15951097Application Date: 2018-04-11
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Publication No.: US10705900B2Publication Date: 2020-07-07
- Inventor: Ming Jin
- Applicant: Western Digital Technologies, Inc.
- Applicant Address: US CA San Jose
- Assignee: Western Digital Technologies, Inc.
- Current Assignee: Western Digital Technologies, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Morgan, Lewis & Bockius LLP
- Main IPC: G06F11/00
- IPC: G06F11/00 ; G06F11/07 ; G06F11/10 ; G11C29/00

Abstract:
Disclosed is a system and method for providing program verify adaptation for flash memory. The method includes performing an adjustment iteration, which includes accessing error counts for respective N states of a plurality of memory cells, applying a weighting to the error counts based on a binary data coding for the N states, determining a state Smin of the N states having a minimum error count Emin from the error counts, determining a state Smax of the N states having a maximum error count Emax from the error counts, determining a difference between the Emax and the Emin satisfies an error count threshold, and adjusting, by a predefined value, a respective program verify offset of a lowest state from Smin and Smax, and of each state between Smin and Smax in the N states, wherein the adjusting is a decrement when Smin is less than Smax and an increment otherwise.
Public/Granted literature
- US20190243699A1 PROGRAM VERIFY ADAPTATION FOR FLASH MEMORY Public/Granted day:2019-08-08
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