MASQUE POUR SOLIDIFICATION LATERALE SEQUENTIELLE ET PROCEDE DE CRISTALLISATION UTILISANT CELUI CI

摘要

Laser beam is irradiated on an amorphous silicon layer formed on a substrate through a mask with transmissive region having central region and tapered side regions. The substrate and the mask are relatively moved such that the side portion of the transmissive region overlaps with the central portion of the irradiated region. The laser beam is again irradiated on the amorphous silicon layer through the mask. Independent claims are also included for the following: (1) polycrystalline silicon layer forming apparatus; and (2) mask.