Patent ID: 6395609
Filing Date: 2002-05-28
Classification: H01L

Abstract:
A method for fabricating a MOSBJT (Metal Oxide Semiconductor Bipolar Junction Transistor) within an active device area of a semiconductor, the method including the steps of:forming a dielectric structure on a portion of said active device area of said semiconductor and forming a gate structure disposed over said dielectric structure; forming a spacer on sidewalls of said gate structure; implanting a first type of dopant into exposed portions of said active device area of said semiconductor for forming a collector region and an emitter region; wherein said semiconductor is doped with a second type of dopant that is opposite of said first type of dopant, and wherein said semiconductor disposed between said collector region and said emitter region forms a base region; and fabricating said dielectric structure to be relatively thin such that a tunneling current through said dielectric structure results when a turn-on voltage is applied on said gate structure such that said tunneling current is a base current of said MOSBJT; and wherein said spacer blocks said implantation of said first type of dopant for forming said collector region and said emitter region such that said dielectric structure and said gate structure are not disposed over said collector region and said emitter region to prevent tunneling current between said gate structure and said collector and emitter regions.