Patent ID: 7326961

Claim:
A semiconductor device comprising a plurality of thin film transistors formed on a base insulating film, wherein: thin film transistors selected from the plurality of thin film transistors are electrically connected through a wiring formed on a layer different from a layer where the plurality of thin film transistors are formed to thereby form a logic element; the base insulating film includes a plurality of projective portions and depressive portions having a rectangular or stripe shape; island-like semiconductor films included in each of the plurality of thin film transistors are formed on the plurality of depressive portions, between the plurality of projective portions and crystallized by a laser light; each of the island-like semiconductor films includes a channel region, a source region and a drain region; a thickness of the source region and a thickness of the drain region are larger than a thickness of the channel region; and the source region and the drain region partially overlap with the projective portions.