Patent ID: 6949452

Claim:
A method for fabricating an image display device comprising an active matrix substrate having a pixel region formed with a large number of pixels arranged as a matrix and a drive circuit region formed with an active circuit for supplying a drive signal to said pixels from outside said pixel region, the method comprising the steps of: forming a polycrystalline silicon film over said pixel region and said drive circuit region of said active matrix substrate; selectively irradiating a portion of the polycrystalline silicon film located in said drive circuit region with a laser beam having a pulse width and/or a pulse interval modulated by scanning the laser beam or the substrate to form discrete reformed regions each composed of a quasi-strip-like-crystal silicon film resulting from reformation, said quasi-strip-like-crystal silicon film having a crystal boundary continuous in the direction of scanning; and forming the active circuit such that a carrier moving direction coincides with a direction of said crystal boundary in each of said discrete reformed regions, wherein said laser beam is a continuous-wave laser beam or a pseudo continuous-wave laser beam before a pulse width and/or a pulse interval of said laser beam is modulated, wherein the irradiation with said laser beam having the pulse width and/or pulse interval modulated is performed intermittently at specified intervals to form, into a generally rectangular configuration, each of individual reformed regions composing each of said discrete reformed regions, and wherein the irradiation with said laser beam having the pulse width and/or pulse interval modulated is performed intermittently along one of the peripheral sides of the active matrix substrate to arrange the individual reformed regions composing each of said discrete reformed regions at specified intervals in a direction in which said drive circuit region extends, wherein said drive circuit region has a first region and a second region which extend in a direction along one of the peripheral sides of the active matrix substrate respectively in one image display device, wherein the scanning with said laser beam having the pulse width and/or pulse interval modulated is performed reciprocally such that a scanning direction of said first region is opposite to a scanning direction of said second region along said one of the peripheral sides of the active matrix substrate to arrange the individual reformed regions composing each of said discrete reformed regions at specified intervals in a direction in which said circuit region extends.