Patent ID: 6677214
Filing Date: 2004-01-13
Classification: B81C,C23C,G01L,G01P,G02F,H01H,H01J,H01L,H02N,Y02E,Y02P

Abstract:
A method of fabricating a bipolar semiconductor device comprising:a plurality of formation steps of forming respective formation layers of a collector, a base and an emitter in which impurities are introduced respectively on an upper surface of a semiconductor substrate respectively; and a plurality of activation steps of activating said formation layers after respective said formation steps, one of said activation steps including a step of applying to at least one of said formation layers beams from directions being perpendicular to densest crystal planes of a single direction or a plurality of different directions under a low temperature allowing no impurity diffusion and supplying impacts to a number of particles in said at least one of said formation layers while simultaneously single-crystallizing said at least one of said formation layers.