Title :
Improvement of the drain breakdown voltage of GaAs power MESFET´s by a simple recess structure
Author :
Furutsuka, Takashi ; Tsuji, Tsutomu ; Hasegawa, Fumio
Author_Institution :
Nippon Electric Company, Ltd., Kawasaki, Japan
fDate :
6/1/1978 12:00:00 AM
Abstract :
Dependence of the drain-to-source breakdown voltage on the drain structure of GaAs power FET´s was investigated. It was found that the drain breakdown voltage is improved by a simple recess structure without surface n+contact layer. This is due to relaxation of the field at the drain region by increase of the thickness of the active epitaxial layer. The GaAs MESFET with this simple recess structure could be operated up to 24 V. There was no explicit difference in the microwave properties of both recess structure devices with and without the n+contact layer. As a practical device, an output power of more than 3 W with 4-dB gain is obtained at 6.5 GHz from this simple recess and cross-over structure GaAs FET.
Keywords :
Buffer layers; Charge carrier density; Contact resistance; Epitaxial layers; Gallium arsenide; MESFETs; Microwave FETs; Microwave devices; Power generation; Voltage;
Journal_Title :
Electron Devices, IEEE Transactions on
DOI :
10.1109/T-ED.1978.19137