Patent ID: 8203146

Claim:
An integrated circuit comprising a P-type TFT and an N-type TFT, wherein the N-type TFT comprises an amorphous oxide of a compound having (a) a composition when in crystalline state represented by In 2−x M3 x O 3 (Zn 1−y M2 y O) m , wherein M2 is Mg or Ca; M3 is B, Al, Ga or Y; 0≦x≦2; 0≦y≦1; and m is zero or a natural number less than 6, or a mixture of said compounds; (b) an electron carrier concentration of greater than 10 12 /cm 3 ; and (c) oxygen defect density decreased by treatment in an atmosphere including oxygen at a predetermined pressure during or after formation of a film of the amorphous oxide.