Patent ID: 6376316
Filing Date: 2002-04-23
Classification: H01L

Abstract:
A method for manufacturing a semiconductor integrated circuit device including a first field effect transistor having a gate insulating film formed over a first element forming region of a main surface of a semiconductor substrate, and a second field effect transistor having a gate insulating film formed over a second element forming region of the main surface of said semiconductor substrate and made thinner than said gate insulating film of said first field effect transistor; comprising the steps of:(a) depositing a film over the main surface of the semiconductor substrate, including the first element forming region and the second element forming region of the semiconductor substrate, so as to form a deposited film; (b) removing a part of the deposited film, from over said second element forming region; and (c) forming a thermally oxidized film over said second element forming region, for forming the gate insulating films respectively of the first field effect transistor and the second field effect transistor individually over said first element forming region and said second element forming region respectively.