Invention Grant
- Patent Title: Modified verify scheme for programming a memory apparatus
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Application No.: US16728716Application Date: 2019-12-27
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Publication No.: US11244734B2Publication Date: 2022-02-08
- Inventor: Ashish Baraskar , Henry Chin , Ching-Huang Lu
- Applicant: SanDisk Technologies LLC
- Applicant Address: US TX Addison
- Assignee: SanDisk Technologies LLC
- Current Assignee: SanDisk Technologies LLC
- Current Assignee Address: US TX Addison
- Agency: Dickinson Wright PLLC
- Agent Steven Hurles
- Main IPC: G11C16/10
- IPC: G11C16/10 ; G11C16/34 ; G11C16/04 ; G11C16/08 ; H01L27/11565 ; H01L27/11556 ; H01L27/11582 ; H01L27/11519 ; G11C16/26

Abstract:
A memory apparatus and method of operation is provided. The apparatus includes memory cells coupled to a control circuit. The control circuit is configured to perform a first programming stage including iteratively programming each of the memory cells to first program states and verifying that the memory cells have a threshold voltage above one of a plurality of first verify voltages corresponding to the first program states. The first programming stage ends before all of the memory cells are verified thereby leaving a fraction of the memory cells below the one of the plurality of first verify voltages. The control circuit also performs a second programming stage including iteratively programming each of the memory cells to second program states and verifying that at least a predetermined number of the memory cells have the threshold voltage above one of a plurality of second verify voltages corresponding to the second program states.
Public/Granted literature
- US20210202022A1 MODIFIED VERIFY SCHEME FOR PROGRAMMING A MEMORY APPARATUS Public/Granted day:2021-07-01
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