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    • 2. 发明公开
    • NON-VOLATILE SEMICONDUCTOR MEMORY DEVICE
    • NICHTFLÜCHTIGEHALBLEITERSPEICHERVORRICHTUNG
    • EP2760026A1
    • 2014-07-30
    • EP12833384.6
    • 2012-09-18
    • Floadia Corporation
    • SHINAGAWA, YutakaKASAI, HideoTANIGUCHI, Yasuhiro
    • G11C16/04G11C16/02
    • H01L27/11517G11C16/0416G11C16/0483G11C16/24G11C16/3468
    • A non-volatile semiconductor memory device is proposed whereby voltage can be more flexibly set in accumulating electric charges into a selected memory cell transistor in comparison with a conventional device. In a non-volatile semiconductor memory device (1), when a selected memory cell transistor (115) is caused to accumulate electric charges, high voltage as writing prevention voltage is applied from a PMOS transistor (9b) while low voltage as writing voltage is applied from an NMOS transistor (15a). Thus, a role of applying voltage to either the selected memory cell transistor (115) or a non-selected memory cell transistor (116) is shared by the PMOS transistor (9b) and the NMOS transistor (15a). Therefore, the gate voltage and the source voltage of the PMOS transistor (9b) and those of the NMOS transistor (15a) can be separately adjusted, and gate-to-substrate voltage thereof can be finally set to be, for instance, 4[V] or etc.
    • 提出了一种非易失性半导体存储器件,与常规器件相比,可以更灵活地将电压累积到选定的存储单元晶体管中。 在非易失性半导体存储器件(1)中,当选择的存储单元晶体管(115)累积电荷时,作为写入电压的高电压从PMOS晶体管(9b)施加,而作为写入电压的低电压是 从NMOS晶体管(15a)施加。 因此,向所选存储单元晶体管(115)或非选择存储单元晶体管(116)施加电压的作用由PMOS晶体管(9b)和NMOS晶体管(15a)共享。 因此,可以分别调整PMOS晶体管(9b)的栅极电压和源极电压,并且可以分别调整NMOS晶体管(9b)的栅极电压和源极电压,并且可以最终将其栅极至衬底电压设置为例如4μm, V]等
    • 8. 发明授权
    • ERASE VERIFICATION FOR NON-VOLATILE MEMORY BY TESTING THE CONDUCTION OF THE MEMORY ELEMENTS IN A FIRST AND A SECOND DIRECTION
    • 删除非挥发性存储器验证通过检查一个第一存储元件和变速器的第二方向
    • EP1751773B1
    • 2009-01-14
    • EP05752106.4
    • 2005-05-20
    • SanDisk Corporation
    • TRAN, DatPONNURU, KiranCHEN, JianLUTZE, Jeffrey, W.WANG, Jun
    • G11C16/34
    • G11C16/3468
    • Systems and methods in accordance with various embodiments can provide for comprehensive erase verification and defect detection in non-volatile semiconductor memory. In one embodiment, the results of erasing a group of storage elements is verified using a plurality of test conditions to better detect defective and/or insufficiently erased storage elements of the group. For example, the results of erasing a NAND string can be verified by testing charging of the string in a plurality of directions with the storage elements biased to turn on if in an erased state. If a string of storage elements passes a first test process or operation but fails a second test process or operation, the string can be determined to have failed the erase process and possibly be defective. By testing charging or conduction of the string in a first (380) and a second (382) direction, defects in any transistors of the Systems and methods in accordance with various embodiments can provide for comprehensive erase verification and defect detection in non-volatile semiconductor memory. In one embodiment, the results of erasing a group of storage elements in verified using a plurality of test conditions to better detect defective and/or insufficiently erased storage elements of the group. For example, the results of erasing a NAND string can be verified by testing charging of the string in a plurality of directions with the storage elements biased to turn on if in an erased state. If a string of storage elements passes a first test process or operation but fails a second test process or operation, the string can be determined to have failed the erase process and possibly be defective. By testing charging or conduction of the string in a plurality of directions, defects in any transistors of the string that are masked under one set of conditions may be exposed under a second set of bias conditions. For example, a string may pass an erase verification operation but then be read as including one or more programmed storage elements. Such a string can be defective and mapped out of the memory device.