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    • 40. 发明授权
    • Memory system, semiconductor memory device and method of driving same
    • 存储器系统,半导体存储器件及其驱动方法
    • US07558141B2
    • 2009-07-07
    • US11955900
    • 2007-12-13
    • Ryota KatsumataMasaru KidohHiroyasu TanakaMasaru KitoHideaki AochiYoshiaki FukuzumiYasuyuki Matsuoka
    • Ryota KatsumataMasaru KidohHiroyasu TanakaMasaru KitoHideaki AochiYoshiaki FukuzumiYasuyuki Matsuoka
    • G11C7/14
    • H01L27/115G11C7/18G11C8/08H01L27/11526H01L27/11529
    • A semiconductor memory device has a semiconductor substrate, first select transistors formed on the surface of said semiconductor substrate, first dummy transistors formed above said first select transistors, a plurality of memory cell transistors formed above said first dummy transistors so as to extend in a direction perpendicular to the surface of said semiconductor substrate, each of said memory cell transistor including an insulating layer having a charge-accumulating function, second dummy transistors formed above said memory cell transistors, and second select transistors formed above said second dummy transistors; wherein a first potential is provided to the gate electrodes of said first select transistors and the gate electrodes of said first dummy transistors and a second potential is provided to the gate electrodes of said second select transistors and the gate electrodes of said second dummy transistors at the time of write operation to write data to said memory cell transistors.
    • 半导体存储器件具有半导体衬底,形成在所述半导体衬底的表面上的第一选择晶体管,形成在所述第一选择晶体管上方的第一虚拟晶体管,形成在所述第一虚拟晶体管上方的多个存储单元晶体管, 垂直于所述半导体衬底的表面,每个所述存储单元晶体管包括具有电荷累积功能的绝缘层,形成在所述存储单元晶体管上方的第二虚拟晶体管以及形成在所述第二虚设晶体管上方的第二选择晶体管; 其中第一电位被提供给所述第一选择晶体管的栅电极和所述第一虚拟晶体管的栅电极,并且第二电位被提供给所述第二选择晶体管的栅电极和所述第二虚晶体管的栅电极 写入操作的时间将数据写入到所述存储单元晶体管。