Patent ID: 6759694
Filing Date: 2004-07-06
Classification: H01L

Abstract:
A semiconductor phototransistor comprising:a substrate; an appropriately doped collector formed on the substrate, which is formed with a collector electrode thereon; an appropriately doped base formed on the collector, which has a different doping type from the collector and is formed with a base electrode thereon; an appropriately doped emitter formed on the base, which has the same doping type as the collector and is formed with an emitter electrode; and an appropriately doped sidewall, which has the same doping type as the base, has a transverse position roughly on the edge of the collector, a longitudinal position roughly under the base and on the same plane as the collector, and is formed with a sidewall contact so that holes accumulated at the base-emitter junction can be removed through the sidewall when the sidewall contact is connected with a lowest voltage.