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    • 7. 发明公开
    • Method for erasing a flash EEPROM memory cell
    • Verfahren zumLöscheneiner闪存EEPROM Speicherzelle
    • EP1189238A1
    • 2002-03-20
    • EP01204255.2
    • 1996-08-07
    • INTERUNIVERSITAIR MICROELEKTRONICA CENTRUM VZW
    • Van Houdt, JanHaspeslagh, LucDeferm, LudoGroeseneken, GuidoMaes, Herman
    • G11C16/14G11C16/16
    • G11C16/16G11C16/14
    • A method of erasing at least one nonvolatile memory cell is disclosed. The cell comprises : a semiconductor substrate including a source and a drain region and a channel therebetween; a floating gate extending over a portion of the drain region with a dielectric layer, therebetween and extending over a portion of said channel, further referred to as the floating gate channel; a control gate extending over another portion of the channel region, further referred to as the control-gate channel, and a program gate capacitively coupled through a further dielectric layer to said floating gate. The method comprises the steps of : applying a first negative voltage to said program gate; and applying a second voltage to at least one of said drain region and said substrate of said cell. The first negative voltage is in the order of -7V and is further substantially simultaneously applied to said control gate thereby coupling a negative voltage to said floating gate of said cell.
    • 公开了擦除至少一个非易失性存储单元的方法。 电池包括:包括源极和漏极区域以及它们之间的沟道的半导体衬底; 一个浮置栅极,在漏极区域的一部分上延伸有介电层,并在该沟道的一部分上延伸,又称为浮动栅极沟道; 延伸到通道区域的另一部分上的控制栅极,进一步称为控制栅极通道,以及通过另一介质层电容耦合到所述浮动栅极的程序栅极。 该方法包括以下步骤:向所述程序门施加第一负电压; 以及向所述电池的所述漏极区域和所述衬底中的至少一个施加第二电压。 第一负电压是-7V的量级,并且进一步基本上同时施加到所述控制栅极,从而将负电压耦合到所述电池的所述浮动栅极。