Patent ID: 7432142
Filing Date: 2008-10-07
Classification: H01L

Abstract:
1. A method of fabricating a transistor, comprising: forming a nitride-based channel layer on a substrate; forming a barrier layer on the nitride-based channel layer; forming a contact recess in the barrier layer to expose a contact region of the nitride-based channel layer; forming a contact layer on the exposed contact region of the nitride-based channel layer using a low temperature deposition process; forming an ohmic contact on the contact layer; forming a gate contact disposed on the barrier layer adjacent the ohmic contact; forming a first dielectric layer on the barrier layer; forming a gate recess in the first dielectric layer; wherein forming a gate contact comprises forming a gate contact in the gate recess; and wherein forming a contact recess comprises forming an ohmic contact recess in the first dielectric layer and the barrier layer that expose a portion of the nitride-based channel layer.