Patent ID: 7344925

Claim:
A method of manufacturing a semiconductor device, comprising: forming a base film that has a rectangular or stripe pattern concave and convex; forming a semiconductor film on the base film; irradiating the semiconductor film with laser light in the longitudinal direction of the concave and convex to enhance the crystallinity of the semiconductor film; etching the entire top face of the semiconductor film which is enhanced in crystallinity so as to partially expose projective portions of the concave and convex; patterning the etched semiconductor film to form a plurality of island-like semiconductor films only in depressive portions of the concave and convex; removing the plurality of the projective portion; and forming a plurality of cells consisting of a plurality of TFTs from the plural island-like semiconductor films, wherein the channel length direction of the plural TFTs matches the longitudinal direction of the concave and convex and the laser light scanning direction, wherein the plural cells form a plurality of columns along the channel length direction, and wherein a plurality of wires for electrically connecting the plural cells with one another are formed between the plural columns.