Patent ID: 8377762
Filing Date: 2013-02-19
Classification: H01L,Y02E,Y02P

Abstract:
1. A method for manufacturing a semiconductor device, comprising the steps of: forming a separation layer over a first substrate; forming a first transistor for a driving circuit portion and a second transistor for a pixel portion over the separation layer, wherein the first transistor includes a first oxide semiconductor layer, and the second transistor includes a second oxide semiconductor layer; forming a first electrode layer electrically connected to the second transistor; forming a conductive layer over the first oxide semiconductor layer so that the conductive layer is overlapped with at least a part of a channel formation region of the first oxide semiconductor layer, transferring the first transistor, the second transistor, and the first electrode layer from the first substrate to a second substrate using the separation layer; removing the first substrate after transferring the first transistor, the second transistor, and the first electrode layer from the first substrate to the second substrate using the separation layer; transferring to a flexible substrate the first transistor, the second transistor, and the first electrode layer which have been transferred to the second substrate; removing the second substrate after transferring to the flexible substrate the first transistor, the second transistor, and the first electrode layer which have been transferred to the second substrate; forming an electroluminescent layer over the first electrode layer transferred to the flexible substrate; forming a second electrode layer over the electroluminescent layer, and forming a flexible metal substrate over the second electrode layer so that the driving circuit portion and the pixel portion are sealed with the flexible metal substrate, wherein the first oxide semiconductor layer and the second oxide semiconductor layer are formed at the same time.