Patent ID: 6818521
Filing Date: 2004-11-16
Classification: H01L

Abstract:
A method for manufacturing a hetero-junction bipolar transistor on a semiconductor substrate, comprising the steps of:a) growing epitaxially a multi-layered semiconductor film having a collector film, a base film, an emitter film and an emitter contact film on the semiconductor substrate, the base film containing carbon atoms as a dopant material and at least the emitter film and the emitter contact film being grown at a growth temperature T; b) annealing the multi-layered semiconductor film by a predetermined period at an annealing temperature TA; and c) forming the emitter contact film to an emitter contact layer, the emitter film to an emitter layer, the base film to a base layer, and the collector film to a collector layer, wherein the growth temperature T and the annealing temperature TA satisfies a relation of TA&lE;600Â° C.