Patent ID: 6624468
Filing Date: 2003-09-23
Classification: H01L,Y10S

Abstract:
A semiconductor device including insulated gate field effect transistors, the semiconductor device comprising:a first insulated gate field effect transistor which constitutes a non-volatile memory element for a non-volatile memory and includes a first gate insulating film containing nitride atoms uniformly doped into the first gate insulating film from the top surface to the bottom surface thereof; and a second insulated gate field effect transistor which constitutes a logic element for a logic circuit and includes a second gate insulating film containing nitride atoms with a peak nitride atom density at least at the surface of the second gate insulating film, the peak nitride atom density being lower than a density of nitride atoms in the first insulating gate film, and the second insulated gate field effect transistor being provided on the same substrate together with the first insulated gate field effect transistor.