Patent ID: 6372594
Filing Date: 2002-04-16
Classification: H01L

Abstract:
A method for fabricating a submicron gate comprising the steps of:(a) laminating a dummy emitter defining a dummy emitter region over a heterojunction bipolar transistor structure including layers sequentially formed over a semiconductor substrate to define a base region, an emitter region, and an emitter cap region, respectively; (b) defining a line having a width of about 1 micron on the dummy emitter by use of a photoresist while using a contact aligner; (c) selectively anisotropic etching the dummy emitter at a region where the line is defined, to allow the dummy emitter to have an etched portion having a bottom surface with a width less than the width of the line defined by the photoresist; and (d) depositing a contact metal on the etched portion of the dummy emitter, thereby forming a gate.