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    • 7. 发明授权
    • Low voltage flash EEPROM C-cell using fowler-nordheim tunneling
    • 低压闪存EEPROM C-cell使用fowler-nordheim隧道
    • US5557569A
    • 1996-09-17
    • US453474
    • 1995-05-25
    • Michael C. SmaylingGiulio G. MarottaIano D'ArrigoGiovanni SantinGeorges FalessiMousumi Bhat
    • Michael C. SmaylingGiulio G. MarottaIano D'ArrigoGiovanni SantinGeorges FalessiMousumi Bhat
    • G11C16/04G11C16/08H01L27/115
    • G11C16/0416G11C16/0433G11C16/08H01L27/115
    • A low voltage flash EEPROM X-Cell includes an array of memory cell transistors (24) that constitute asymmetric floating gate memory cells wherein programming is achieved on only one side of the memory cells (24). The programming side of each of the memory cells (24) is connected to one of a plurality of Column Lines (28) at nodes (30). Each node (30) shares the programming side of two of the memory cells (24) and the non-programming side of two of the memory cells (24). The control gates of each of the memory cells (24) are connected to Word Lines (26) associated with rows of the array. To Flash Write all of the memory cells (24), the Column Lines (38) are connected to a negative medium voltage and the row lines (26) are connected to a positive medium voltage. To selectively erase one of the memory cells (24), the Column Line (28) associated with the programming side of the select memory cell transistor is connected to a positive medium voltage and the associated line (26) is connected to a positive Read voltage. The remaining Word Lines are connected to a negative Read voltage and the remaining Column Lines (28) are connected to a zero volt level.
    • 低电压快闪EEPROM X-Cell包括构成非对称浮动栅极存储单元的存储单元晶体管阵列(24),其中仅在存储单元(24)的一侧实现编程。 每个存储器单元(24)的编程侧在节点(30)处连接到多个列线(28)中的一个。 每个节点(30)共享两个存储器单元(24)的两个存储器单元(24)的非编程侧的编程侧。 每个存储器单元(24)的控制栅极连接到与阵列的行相关联的字线(26)。 闪存写入所有存储单元(24),列线(38)连接到负中等电压,行线(26)连接到正中压。 为了选择性地擦除存储器单元(24)中的一个,与选择存储单元晶体管的编程侧相关联的列线(28)连接到正的中间电压,并且相关的线路(26)连接到正的读取电压 。 剩下的字线连接到负的读取电压,剩余的列线(28)连接到零伏电平。