Invention Application
- Patent Title: MULTI-STAGE ERASE OPERATION FOR A MEMORY DEVICE
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Application No.: US17868703Application Date: 2022-07-19
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Publication No.: US20220351782A1Publication Date: 2022-11-03
- Inventor: Foroozan S. Koushan , Shinji Sato
- Applicant: Micron Technology, Inc.
- Applicant Address: US ID Boise
- Assignee: Micron Technology, Inc.
- Current Assignee: Micron Technology, Inc.
- Current Assignee Address: US ID Boise
- Main IPC: G11C16/14
- IPC: G11C16/14 ; G11C16/04 ; G11C16/08 ; G11C16/32

Abstract:
Control logic in a memory device initiates an erase operation on a memory array and causes an erase voltage signal to be applied to a source terminal of a string of memory cells in a data block of the memory array during the erase operation. The control logic further causes a first voltage signal to be applied to a first select line of the data block and a second voltage signal to be applied to a second select line of the data block, wherein the first select line is coupled to a first device in the string of memory cells and the second select line is coupled to a second device in the string of memory cells, and wherein the first voltage signal and the second voltage signal both have a common first voltage offset with respect to the erase voltage signal during a first stage of the erase operation. The control logic further determines an end of the first stage of the erase operation and causes the first voltage signal to decrease to a second voltage offset with respect to the erase voltage signal and causes the second voltage signal to decrease to a third voltage offset with respect to the erase voltage signal during a second stage of the erase operation, wherein the second offset is greater than the third offset.
Public/Granted literature
- US11646083B2 Multi-stage erase operation for a memory device Public/Granted day:2023-05-09
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