Invention Grant
- Patent Title: Efficient erase algorithm for SONOS-type NAND flash
- Patent Title (中): SONOS型NAND闪存的高效擦除算法
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Application No.: US12052276Application Date: 2008-03-20
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Publication No.: US07643349B2Publication Date: 2010-01-05
- Inventor: Hang-Ting Lue
- Applicant: Hang-Ting Lue
- Applicant Address: TW Hsinchu
- Assignee: Macronix International Co., Ltd.
- Current Assignee: Macronix International Co., Ltd.
- Current Assignee Address: TW Hsinchu
- Agency: Haynes Beffel & Wolfeld LLP
- Main IPC: G11C16/04
- IPC: G11C16/04

Abstract:
A method for operating a dielectric charge trapping memory cell as described herein includes applying an initial voltage from the gate to the substrate of the memory cell for a predetermined period of time to reduce the threshold voltage of the memory cell. The method includes applying a sequence of voltages from the gate to the substrate of the memory cell to further reduce the threshold voltage of the memory cell, wherein a subsequent voltage in the sequence of voltages has a lower magnitude from the gate to the substrate than that of a preceding voltage in the sequence of voltages.
Public/Granted literature
- US20090103370A1 EFFICIENT ERASE ALGORITHM FOR SONOS-TYPE NAND FLASH Public/Granted day:2009-04-23
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