Patent ID: 6768183
Filing Date: 2004-07-27
Classification: H01L

Abstract:
A semiconductor device comprising:a semiconductor substrate; an NPN bipolar transistor formed on the substrate in an NPN forming region and having an n type emitter region, a p type base region surrounding the n type emitter region and an n type collector region surrounding the n type base region; and a PNP bipolar transistor formed on the substrate in a PNP forming region and having a p type emitter region, an n type base region surrounding the p type emitter region and a p type collector region surrounding the n type base region; wherein the NPN forming region and the PNP forming region both have a respective burying region of a like conductivity type or have no buryning region; and a current that flows from the p type emitter region to the n type base region in the PNP transistor flows in the n type base region in a direction perpendicular to the substrate.