Journal
ETRI JOURNAL
Volume 45, Issue 1, Pages 171-179Publisher
WILEY
DOI: 10.4218/etrij.2021-0370
Keywords
gate; HEMT; InAlAs; InGaAs; recess
Ask authors/readers for more resources
We have developed a fabrication process for InAlAs/InGaAs metamorphic high electron mobility transistor devices, allowing for adjustable gate length to suit specific applications. Key processes include a two-step electron-beam lithography process with a three-layer resist and a gate recess etching process using citric acid. By optimizing the etching conditions, we were able to successfully manufacture various monolithic microwave integrated circuits.
We have developed an InAlAs/InGaAs metamorphic high electron mobility transistor device fabrication process where the gate length can be tuned within the range of 0.13 mu m-0.16 mu m to suit the intended application. The core processes are a two-step electron-beam lithography process using a three-layer resist and gate recess etching process using citric acid. An electron-beam lithography process was developed to fabricate a T-shaped gate electrode with a fine gate foot and a relatively large gate head. This was realized through the use of three-layered resist and two-step electron beam exposure and development. Citric acid-based gate recess etching is a wet etching, so it is very important to secure etching uniformity and process reproducibility. The device layout was designed by considering the electrochemical reaction involved in recess etching, and a reproducible gate recess etching process was developed by finding optimized etching conditions. Using the developed gate electrode process technology, we were able to successfully manufacture various monolithic microwave integrated circuits, including low noise amplifiers that can be used in the 28 GHz to 94 GHz frequency range.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available