Patent ID: 8372664

Claim:
A method for manufacturing a display device, comprising the steps of: forming a pixel portion comprising a thin film transistor comprising an oxide semiconductor layer comprising a channel formation region over a first substrate; forming a sealant comprising an ultraviolet curable resin over the first substrate to surround at least the pixel portion; forming a liquid crystal layer comprising an ultraviolet curable resin to overlap the pixel portion by dropping a liquid crystal in a region surrounded by the sealant over the first substrate; attaching a second substrate to the first substrate with the sealant between the second substrate and the first substrate; irradiating the liquid crystal layer with ultraviolet light; curing the sealant with ultraviolet light irradiation after irradiating the liquid crystal layer with ultraviolet light; and performing heat treatment for repairing damage on the oxide semiconductor layer caused by the ultraviolet light irradiation from irradiating the liquid crystal layer with ultraviolet light and curing the sealant.