Patent ID: 7307282

Claim:
A thin film transistor comprising: at least a channel forming region in a crystalline semiconductor film comprising silicon, wherein an orientation ratio of a lattice plane { 101 } of the crystalline semiconductor film is not smaller than 20% and the lattice plane { 101 } has an angle of not larger than 10 degrees with respect to a surface of the crystalline semiconductor film, wherein an orientation ratio of a lattice plane { 001 } of the crystalline semicoductor film is not larger than 3%, and the lattice plane { 001 } has an angle of not larger than 10 degrees with respect to a surface of the crystalline semiconductor film, wherein an orientation ratio of a lattice plane { 111 } of the crystalline semiconductor film is not larger than 5%, and the lattice plane { 111 } has an angle not larger than 10 degrees with respect to a surface of the crystalline semiconductor film, and wherein the lattice plane { 101 }, { 001 } and { 111 } are detected by an electron backscatter diffraction pattern method.