Patent ID: 6242313
Filing Date: 2001-06-05
Classification: H01L

Abstract:
A method of fabricating a buried layer punched collector bipolar, (BPCB), device, on a semiconductor substrate, comprising the steps of:forming a buried layer region, in a first portion of said semiconductor substrate;depositing an epitaxial silicon layer, with a portion of said buried layer region, extending into the bottom portion of said epitaxial silicon layer;forming a well region, in said epitaxial silicon layer, with said well region overlying said buried layer region;forming field oxide regions in said semiconductor substrate;forming a polysilicon field plate, or multiple polysilicon field plates, on said field oxide regions;forming a base region in an area of said well region, located between the inside edges of said field oxide regions;forming an emitter region, in a top portion of said base region; and;forming collector regions, in an area of said well region, adjacent to the outside edges of said field oxide regions.