Invention Grant
US07652929B2 Non-volatile memory and method for biasing adjacent word line for verify during programming
有权
用于偏置相邻字线以进行编程的非易失性存储器和方法进行验证
- Patent Title: Non-volatile memory and method for biasing adjacent word line for verify during programming
- Patent Title (中): 用于偏置相邻字线以进行编程的非易失性存储器和方法进行验证
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Application No.: US11856639Application Date: 2007-09-17
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Publication No.: US07652929B2Publication Date: 2010-01-26
- Inventor: Yan Li
- Applicant: Yan Li
- Applicant Address: US CA Milpitas
- Assignee: SanDisk Corporation
- Current Assignee: SanDisk Corporation
- Current Assignee Address: US CA Milpitas
- Agency: Davis Wright Tremaine LLP
- Main IPC: G11C16/04
- IPC: G11C16/04

Abstract:
Various programming techniques for nonvolatile memory involve programming a memory cell relative to a target threshold level. The process includes initially programming relative to a first verify level short of the target threshold level by a predetermined offset. Later, the programming is completed relative to the target verify level. For verifying with the first verify level, a virtual first verify level is effectively used where the target threshold level is used on a selected word line and a bias voltage is used on an adjacent unselected word line. Thus, the verify level in a first programming pass or programming phase is preferably virtually offset by biasing one or more adjacent word line instead of actually offsetting the standard verify level in order to avoid verifying at low levels.
Public/Granted literature
- US20090073771A1 Non-Volatile Memory and Method for Biasing Adjacent Word Line for Verify During Programming Public/Granted day:2009-03-19
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