Patent ID: 8426264

Claim:
A method of fabricating a thin-film transistor, the method comprising: forming a semiconductor thin film including a non-single-crystal region on an insulating substrate, the semiconductor thin film having a T shaped pattern formed by a lateral portion and a width portion extended from the lateral portion; radiating a pulse laser beam with an inverted peak pattern shape on the non-single-crystal region, thereby forming at least one crystallized region, the at least one crystallized region including at least one single-crystal grain which is crystallized in a lateral direction; and forming an MOS-bipolar hybrid thin film transistor including a lateral bipolar thin-film transistor and a MOS thin-film transistor in the at least one crystallized region, wherein the MOS thin-film transistor and the lateral bipolar thin-film transistor are formed in the lateral portion, the MOS thin-film transistor includes a source region, a channel region and a drain region, which are formed in the semiconductor thin film, the lateral bipolar thin-film transistor includes an emitter, a base and a collector, which are formed in the semiconductor thin film, and the lateral bipolar thin-film transistor includes a base contact portion which is formed in the width portion and electrically connected to the base.