Invention Grant
- Patent Title: Memory apparatus and method of operation using adaptive erase time compensation for segmented erase
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Application No.: US17231071Application Date: 2021-04-15
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Publication No.: US11557358B2Publication Date: 2023-01-17
- Inventor: Dengtao Zhao , Deepanshu Dutta , Ravi Kumar
- 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 C. Hurles
- Main IPC: G11C16/16
- IPC: G11C16/16 ; G11C16/34 ; G11C16/04

Abstract:
A memory apparatus and method of operation is provided. The apparatus includes memory cells connected to word lines and bit lines and arranged in strings and configured to retain a threshold voltage. Each of the memory cells is configured to be erased in an erase operation occurring during an erase time period. A control circuit is configured to adjust at least a portion of the erase time period in response to determining the erase operation is a segmented erase operation and is resumed after being suspended. The control circuit applies an erase signal having a plurality of voltage segments temporally separated from one another during the erase time period to each of the strings while simultaneously applying a word line erase voltage to selected ones of the word lines to encourage erasing of the memory cells coupled to the selected ones of the word lines in the segmented erase operation.
Public/Granted literature
- US20220336029A1 MEMORY APPARATUS AND METHOD OF OPERATION USING ADAPTIVE ERASE TIME COMPENSATION FOR SEGMENTED ERASE Public/Granted day:2022-10-20
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