Patent ID: 6890776
Filing Date: 2005-05-10
Classification: G01N,H01L

Abstract:
1. A method of fabricating a semiconductor device including a field-effect transistor (FET) having a silicon oxide interlayer film formed on a compound semiconductor substrate, the method comprising: forming a silicon oxide film on a first compound semiconductor substrate; analyzing the silicon oxide film by FT-IR spectroscopy to obtain an FT-IR spectrum; estimating a quantity of silicon-silicon bonds operating as electron traps from a peak with a wave number of 880 cm determining a fabrication process condition for forming the silicon oxide interlayer film so as to reduce the quantity of silicon-silicon bonds therein; forming the silicon oxide interlayer film on a second compound semiconductor substrate according to the determined fabrication process condition; and forming the FET on the second compound semiconductor substrate, incorporating the silicon oxide interlayer film.