Patent ID: 6396110
Filing Date: 2002-05-28
Classification: H01L

Abstract:
A semiconductor device, comprising:a bipolar transistor region with a bipolar transistor having an emitter and an emitter electrode directly on said emitter; a first wiring layer in said bipolar transistor region over said emitter electrode and separated from said emitter electrode by an insulation layer; a MOS transistor region with a MOS transistor having a source/drain; a second wiring layer in said MOS transistor region over said source/drain and separated from said source/drain by said insulation layer, a height of said insulation layer being greater in said MOS transistor region than in said bipolar transistor region; a first contact plug through said insulation layer and electrically connecting said second wiring layer to said source/drain; and at least 6 separate second contact plugs through said insulation layer and electrically connecting said first wiring layer to said emitter electrode, said second contact plugs each having a height less than that of said first contact plug, said second contact plugs being directly over said emitter so that said second contact plugs overlap said emitter.