Patent ID: 7132320
Filing Date: 2006-11-07
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device having a bipolar transistor and a resistance element formed in a first region and a second region of a semiconductor substrate, respectively, comprising the steps of: (a) forming an emitter layer of the bipolar transistor in the first region; (b) forming a base layer of the bipolar transistor, under the emitter layer, in the first region; (c) forming a collector layer of the bipolar transistor, under the base layer, in the first region; (d) forming a base electrode, electrically connected with the base layer, on the base layer; (e) forming a collector electrode, electrically connected with the collector layer, on the collector layer; and (f) forming an emitter electrode, electrically connected with the collector layer, on the collector layer, and a resistance film for the resistance element in the second region; (g) forming a collector wiring over the collector electrode, said collector wiring to be electrically connected with the collector electrode; (h) forming a base wiring over the base electrode, said base wiring to be electrically connected with the base electrode; (i) forming an emitter wiring over the emitter electrode, said emitter wiring to be electrically connected with the emitter electrode; and (j) forming a first wiring and a second wiring over the resistance film, said first and second wirings to be electrically connected with the resistance film, wherein, in the step (f), the emitter electrode and resistance film are formed using a same layer.