Patent ID: 7902002

Claim:
A method of manufacturing a semiconductor device comprising: forming a semiconductor film on an insulating surface; scanning said semiconductor film with a laser beam to crystallize said semiconductor film; forming at least first and second semiconductor islands by patterning the crystallized semiconductor film; and forming a first thin film transistor using the first semiconductor island as an active layer including a first channel forming region thereof and a second thin film transistor using the second semiconductor island as an active layer including a second channel forming region thereof, forming a source wiring to connect the first and the second semiconductor islands which have the same crystalline state, wherein a sum of WC and WS, in which the WC is a sum of widths of the first and second channel forming regions and the WS is an interval between the first and second channel forming regions, is smaller than a width LP of the laser beam, and wherein the semiconductor film is not subjected to be patterned before the scanning step.