A simple technique for simultaneous fabrication of p +/n diodes and ohmic contacts on n-type InP

Abstract
Low leakage current p+/n step junctions with mechanically stable ohmic contacts to p+ layer are fabricated on n‐InP wafers simultaneously by a simple procedure consisting of vacuum evaporation of Ni, Zn, and Au followed by a short heat treatment at 340 °C. Current‐voltage and capacitance‐voltage measurements, secondary ion mass spectroscopy, and deep level transient spectroscopy are employed to characterize the diodes fabricated and to understand their structure.