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    • 14. 发明公开
    • Method for programming a nonvolatile memory
    • Verfahren zum programmieren einesnichflüchtigenSpeicher
    • EP0763829A2
    • 1997-03-19
    • EP96113461.6
    • 1996-08-22
    • LG Semicon Co., Ltd.
    • Choi, Woong-Lim
    • G11C16/06
    • G11C16/3486G11C11/5621G11C11/5628G11C11/5635G11C16/10G11C16/3468G11C2211/5624
    • A method for programming a nonvolatile memory cell having a control gate (1), a floating gate (2), a drain (5), a sour e (3), and a channel region (4) disposed between the drain (5) and source (3), the method includes the steps of applying a first voltage to the control gate (1) to form an inversion layer in the channel region (4), the first voltage being varied to program at least two threshold levels of the memory cell, applying a second voltage to the drain (5) and a third voltage to the source (3), the second voltage being greater than the third voltage, monitoring a current flowing between the drain (5) and the source (3) during the programming of the at least two threshold levels, and terminating any one of the first voltage, the second voltage, and the third voltage when the monitored current reaches a preset reference current to thereby stop the programming of the at least two threshold levels.
    • 用于编程具有设置在漏极和源极之间的控制栅极,浮置栅极,漏极,源极和沟道区域的非易失性存储器单元的方法包括:向所述控制栅极施加第一电压以在所述控制栅极, 通道区域。 改变第一电压以对存储器单元的至少两个阈值电平进行编程。 向漏极施加第二电压,向源极施加第三电压,第二电压大于第三电压。 在对至少两个阈值电平进行编程期间,监视在漏极和源极之间流动的电流。 当监视的电流达到预设的参考电流以停止对至少两个阈值电平的编程时,终止第一电压,第二电压和第三电压中的任何一个。 参考电流在至少两个阈值电平的编程期间具有固定值。