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Reading method for a cell string
Author
admgenie
Date
2024-03-25
Views
398
A reading method for a cell string using multiple pass voltages includes a pre-charging step and a reading step to read a selected word line cell WL[k]. The pre-charging step comprises applying a positive pass voltage (Vpass1) to the selected word line (WL[k]), the upper word lines (Upper WL) of the selected word line (WL[k]), at least one the lower word lines adjacent to the selected word line (WL[k]); and applying a negative pass voltage (Vpass2) to the remaining lower word lines (Lower WL) except for WL[k−1]. The reading step comprises applying sequentially a first voltage which is lower than a read voltage (Vverify) and the read voltage (Vverify) to the selected word line WL[k], applying a second voltage to a common source line CSL and the unselected word lines and sensing a current or a voltage of the selected word line WL[k], thereby reading information stored in the selected word line WL[k].
등록번호/일자 09734916 (2017.08.15)
등록번호/일자 09734916 (2017.08.15)