Patent ID: 6600211
Filing Date: 2003-07-29
Classification: H01L

Abstract:
A bipolar transistor, comprising:a semiconductive material substrate; a collector region, emitter region and base region extending within the semiconductive material substrate; separate access regions associated with the base region, emitter region and collector region, respectively; the base access region being a p-type region, and the emitter and collector access regions being n-type regions; the collector region including an n-type doped connecting region extending beneath the emitter and base regions; the base region including a p-type doped location extending beneath the emitter region and above the n-type doped connecting region; an n-type doped intermediate location within the emitter region and between the p-type doped location and the emitter access region; the n-type doped intermediate location being less heavily doped with n-type dopant than the emitter access region; and wherein the base access region, emitter access region and collector access region comprise conductively doped projections extending upwardly from the semiconductive material substrate.