Patent ID: 8148236

Claim:
A method for manufacturing a display device comprising the steps of: doping an ion into a region in a first substrate, wherein the first substrate is a single crystal semiconductor substrate; forming a bonding layer over the first substrate; adhering the bonding layer to a second substrate, wherein the second substrate has an insulating surface; forming a semiconductor layer over the second substrate with the bonding layer interposed therebetween, by cleaving the first substrate using the region as a cleavage plane; forming a first semiconductor island and a second semiconductor island, by etching the semiconductor layer; forming a gate insulating layer over the first semiconductor island and over the second semiconductor island; forming a first gate electrode over the first semiconductor island with the gate insulating layer interposed therebetween, thereby forming a first transistor; and forming a second gate electrode over the second semiconductor island with the gate insulating layer interposed therebetween, forming a circuit in a peripheral circuit portion using the first transistor, wherein the first semiconductor island is formed in the peripheral circuit portion, and wherein the second semiconductor island is formed in a display portion, and wherein a driving circuit is not included in the circuit.