Patent ID: 6767842
Filing Date: 2004-07-27
Classification: H01L

Abstract:
A method of making a semiconductor device comprising:providing a Silicon substrate; forming a Silicon dioxide layer on the Silicon substrate; forming at least one of a Polysilicon and Silicon nitride layer on the silicon dioxide layer; removing at least a portion of the Silicon dioxide layer which is disposed on the Silicon substrate in order to expose a portion of the Silicon substrate and create an undercut under the at least one of the Polysilicon and Silicon nitride layer; after creating the undercut, depositing Siâ€”Ge on the Silicon substrate, in the undercut under the at least one of the Polysilicon and Silicon nitride layer; depositing a metallic contacting material in contact with the Siâ€”Ge; depositing an insulating material on the metallic contacting material; and providing that said semiconductor device is configured such that the Siâ€”Ge forms the base of a transistor.