Nonvolatile semiconductor memory cell matrix, a mehtod for operating the same, monolithic integrated circuits and systems

摘要

A nonvolatile semiconductor memory includes a plurality of word lines WL; a plurality of bit lines BL; memory cell transistors having a charge storage layer arranged in the column whose charge storage state is controlled by one of the word lines; memory cell transistor rows MSGm, MSGn functioning as select gate lines by injecting a charge into the charge storage layer of a memory cell transistor to form an enhancement mode transistor. Any one of a first select gate transistor or a second transistor, or both may be formed by a memory cell transistor functioning as a select gate transistor.