Invention Grant
US08098526B2 Reverse reading in non-volatile memory with compensation for coupling
有权
在非易失性存储器中反向读取,具有耦合补偿
- Patent Title: Reverse reading in non-volatile memory with compensation for coupling
- Patent Title (中): 在非易失性存储器中反向读取,具有耦合补偿
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Application No.: US12710984Application Date: 2010-02-23
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Publication No.: US08098526B2Publication Date: 2012-01-17
- Inventor: Nima Mokhlesi
- Applicant: Nima Mokhlesi
- Applicant Address: US TX Plano
- Assignee: SanDisk Technologies Inc.
- Current Assignee: SanDisk Technologies Inc.
- Current Assignee Address: US TX Plano
- Agency: Vierra Magen Marcus & DeNiro LLP
- Main IPC: G11C11/34
- IPC: G11C11/34 ; G11C16/04

Abstract:
Shifts in the apparent charge stored by a charge storage region such as a floating gate in a non-volatile memory cell can occur because of electrical field coupling based on charge stored in adjacent (or other) charge storage regions. Although not exclusively, the effects are most pronounced in situations where adjacent memory cells are programmed after a selected memory cell. To account for the shift in apparent charge, one or more compensations are applied when reading storage elements of a selected word line based on the charge stored by storage elements of other word lines. Efficient compensation techniques are provided by reverse reading blocks (or portions thereof) of memory cells. By reading in the opposite direction of programming, the information needed to apply (or select the results of) an appropriate compensation when reading a selected cell is determined during the actual read operation for the adjacent word line rather than dedicating a read operation to determine the information.
Public/Granted literature
- US20100149876A1 Reverse Reading In Non-Volatile Memory With Compensation For Coupling Public/Granted day:2010-06-17
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