NONVOLATILE SEMICONDUCTOR MEMORY DEVICE, AND METHOD FOR DELETING DATA FROM THE SAME

摘要

PURPOSE: A nonvolatile semiconductor memory device and a method for deleting data from the same are provided to reduce manufacturing costs without having a process of separating a P well part from a logic part and a memory cell since the data about a non-volatile memory device is removed from NAND type cells one by one. CONSTITUTION: An underlying insulation film(12) is formed on a substrate(10) having an insulating surface. A semiconductor film(14) is formed on the underlying insulation film. A first insulating layer(16) is formed on the semiconductor film. A floating gate(20) is formed on the first insulating layer. A second insulating layer(22) is formed on the floating gate. A control gate(24) is formed on the second insulating layer.