Electronic device structure including a buffer layer on a base layer

Abstract

Electronic device structures that compensate for non-uniform etching on a semiconductor wafer and methods of fabricating the same are disclosed. In one embodiment, the electronic device includes a number of layers including a semiconductor base layer of a first doping type formed of a desired semiconductor material, a semiconductor buffer layer on the base layer that is also formed of the desired semiconductor material, and one or more contact layers of a second doping type on the buffer layer. The one or more contact layers are etched to form a second contact region of the electronic device. The buffer layer reduces damage to the semiconductor base layer during fabrication of the electronic device. Preferably, a thickness of the semiconductor buffer layer is selected to compensate for over-etching due to non-uniform etching on a semiconductor wafer on which the electronic device is fabricated.

Dependencies are inferred from the claim text.