Patent ID: 7494887

Claim:
A method for fabricating semiconductor devices, the method comprising acts of: depositing a set of extrinsic layers on a substrate; removing a portion of the extrinsic layers and substrate to create a well having an intrinsic portion and an extrinsic portion, where the intrinsic portion is configured for receiving a layered intrinsic semiconductor device; and forming a layered intrinsic semiconductor device in the intrinsic portion of the well, wherein the layered intrinsic semiconductor device includes a type of layer selected from a group comprising an intrinsic collector layer, an intrinsic base layer, and an intrinsic sub-collector layer, and where the extrinsic layers include a type of layer selected from a group comprising an extrinsic collector layer, an extrinsic base layer, and an extrinsic sub-collector layer, such that a type of layer of the intrinsic semiconductor device is connected to a same type of layer of the extrinsic layers.