Patent ID: 6441462
Filing Date: 2002-08-27
Classification: H01L

Abstract:
A bipolar transistor comprising:a substrate having a subcollector located atop a surface of the substrate; a Si-containing layer present atop said subcollector, said Si-containing layer having isolation regions therein, each isolation region containing an inner edge; a SiGe-containing layer present atop said Si-containing layer, said SiGe-containing layer comprising a single-crystal SiGe-containing region and abutting polycrystalline SiGe-containing regions; a facet region between said single-crystal SiGe-containing region and each polycrystalline SiGe-containing region; a patterned emitter located above said single-crystal SiGe-containing region and a portion of each polycrystalline SiGe-containing region; and a silicide region located above and contacting remaining portions of said polycrystalline SiGe-containing layer, wherein said silicide region is not located above said facet region and said silicide region does not extend beyond said inner edge of each isolation region.