Patent ID: 8129820
Filing Date: 2012-03-06
Classification: G01K,H01L

Abstract:
1. A semiconductor device having a bipolar transistor, the bipolar transistor comprising: a collector region having a first conductivity type disposed on a surface of a semiconductor substrate having the first conductivity type; a base region having a second conductivity type disposed in the collector region; an emitter region having the first conductivity type disposed in the base region; a high concentration first conductivity type region for a collector electrode disposed in the collector region; and a high concentration second conductivity type region for a base electrode disposed in the base region; wherein the high concentration first conductivity type region for a collector electrode and the high concentration second conductivity type region for a base electrode contact directly with each other so that the collector region and the base region have a same potential; and wherein the high concentration first conductivity type region for a collector electrode and the high concentration second conductivity type region for a base electrode are disposed adjacent to and in direct contact with one another via a common metal electrode disposed in a single contact hole formed in an interlayer insulating film of the semiconductor device so that the high concentration first conductivity type region for a collector electrode and the high concentration second conductivity type region for a base electrode have the same potential.