Oxide films have been deposited on InP by sputtering InP in an oxygen dc-excited plasma. The rate of sputtering was enhanced by applying a magnetic field. Preliminary microprobe and Auger analysis of the films has indicated equal proportions of indium and phosphorus with a good incorporation of oxygen and a moderately uniform composition. Measurements on MOS devices have shown a film resistivity of approximately equals 3 multiplied by 10**1**2 OMEGA cm. The oxide film has been used in fabricating n-channel inversion-type MOSFETs.