Patent ID: 6441441
Filing Date: 2002-08-27
Classification: H01L

Abstract:
A semiconductor device, comprising:at least one bipolar transistor; and at least one metal-oxide semiconductor (MOS) transistor on a semiconductor substrate, said at least one MOS transistor including a gate oxide film and a gate electrode, said gate electrode being comprised of a first electrode layer and a second electrode layer formed on said first electrode layer, said first electrode layer being in contact with said gate oxide film and containing nitrogen selectively introduced into the gate electrode, a majority of the nitrogen being aggregated at an interface with said gate oxide film and portions of the nitrogen other than the majority being disposed at both sides of the interface with the gate oxide film; and said at least one bipolar transistor including a nitrogen-free emitter electrode having a same film thickness as a thickness of said second gate electrode layer of said at least one MOS transistor.