Fabrication of double recess structure by single lithography step using silicon-nitride-assisted process in pseudomorphic HEMTs
A new fabrication process of double recess structure using single masking. Any recess widths and heights can be realized with a single lithography step. Double recess structure achieved by varying silicon nitride and GaAs etch times. Electric field simulation substantiates tailoring of the electric field. Led to increased breakdown voltages essential for power applications in pHEMTs.
double recess gaas breakdown voltage phemt