Patent ID: 8759877
Filing Date: 2014-06-24
Classification: H01L

Abstract:
1. A high electron mobility transistor with stress release metal electrodes comprising: a substrate with a buffer layer; at least one channel layer with a front surface covers a portion of said buffer layer; a drain semiconductor contact layer covers a portion of said channel layer; a drain electrode covers at least a portion of said drain semiconductor contact layer; a source semiconductor contact layer covers a second portion of said channel layer; a source electrode covers at least a portion of said source semiconductor contact layer; a gate electrode covers a central portion of said channel layer having a gate length, a gate width, and a bottom surface contacting said front surface of said channel layer, wherein said gate electrode has a plurality of gate stress release sections along said gate width of said gate electrode, each of said gate stress release sections has a section length and provides a bubble-like gate electrode cavity embedded in said gate electrode, causing at least a portion of said bottom surface of said gate electrode at location of each said stress release section from contacting said front surface of said channel layer, each said gate electrode cavity has a gate electrode cavity height.