Invention Grant
- Patent Title: Adaptive pre-programming
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Application No.: US17746616Application Date: 2022-05-17
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Publication No.: US11955182B2Publication Date: 2024-04-09
- Inventor: Long Pham , Sai Gautham Thoppa
- 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: SHEPPARD, MULLIN, RICHTER & HAMPTON LLP
- Agent Hector A. Agdeppa
- Main IPC: G11C7/00
- IPC: G11C7/00 ; G11C16/10 ; G11C16/26 ; G11C16/32 ; G11C16/34

Abstract:
Adaptive and dynamic control of the duration of a pre-program pulse based on a number of planes selected for the pre-program operation is disclosed. A value for a pre-program time increment parameter may be selected based on the number of planes for which the pre-program operation will be performed or determined based on a predefined association with the number of planes. A pre-program voltage pulse may then be applied for a duration that is equal to a default duration for a single-plane pre-program operation incremented by the time increment parameter value. This approach solves the technical problem of Vt downshift for multi-plane pre-program operations, and thus, ensures that the success rate of secure erase operations does not diminish as the number of planes increases. This, in turn, allows for pre-program operations to be consistently performed on a multi-plane basis, which produces the technical effect of improved system performance.
Public/Granted literature
- US20230377656A1 ADAPTIVE PRE-PROGRAMMING Public/Granted day:2023-11-23
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