Patent ID: 6528828
Filing Date: 2003-03-04
Classification: H01L

Abstract:
A differential negative resistance element comprising:a multi-layered semiconductor structure formed on a substrate, and including a first semiconductor layer having a first conductivity type and serving as one of a collector region and an emitter region of a bipolar transistor, a second semiconductor layer having a second conductivity type opposite to said first conductivity type and serving as a base contact region, a base region having a first thickness and a channel region with second thickness less than said first thickness located between said base contact region and said base region and a third semiconductor layer having said first conductivity type and serving as the other of said collector region and said emitter region; and collector, base and emitter electrodes serving as ohmic electrodes respectively connected to said collector, said base contact region and said emitter region, said channel region being thinner than said base contact region and said base region, the thickness of said channel region being reduced to a degree such that the device's resistance varies as a collector voltage applied to said collector electrode varies.