Patent ID: 7667235

Claim:
A semiconductor device comprising: a crystalline semiconductor thin film including a source region, drain region, and a channel region between the source and drain regions, wherein a carbon content and a nitrogen content in the crystalline semiconductor thin film are 5×10 18 atoms/cm 3 or less, and an oxygen content in the crystalline semiconductor thin film is 1.5×10 19 atoms/cm 3 or less, wherein an absolute value of a rotation angle made by equivalent axes between adjacent crystal grains or by axes in rotation relation of 70.5° with respect to the equivalent axes is within 4° in the crystalline semiconductor thin film, wherein the crystalline semiconductor thin film includes a single crystal or a substantially single crystal, wherein at least one of the source and drain regions includes a silicide layer, and wherein a bearing ratio at 2 −1 (P-V value) is within a range of 29 to 72% in the crystalline semiconductor thin film.