Patent ID: 7466010
Filing Date: 2008-12-16
Classification: H01L

Abstract:
1. A bipolar transistor comprising: a base region comprising an intrinsic base region and surrounding raised extrinsic base regions; a block polysilicon emitter region located atop and in contact with said intrinsic base region, the block polysilicon emitter region including a polysilicon emitter and a spacer having a planar outermost edge normal to a surface of the intrinsic base region; a silicide layer located on the raised extrinsic base region, said silicide layer having an inner edge that is aligned to the planar outermost edge of the spacer of the block polysilicon emitter region, wherein the inner edge of the silicide layer abuts the planar outermost edge of the spacer; and an emitter contact border located atop the raised extrinsic base region, wherein an inner edge of the emitter contact border is vertically aligned to both of the inner edge of the silicide layer and an inner edge of the raised extrinsic base region that is abutting the spacer having the planar outmost edge of the block polysilicon emitter region.