Self-Limited Growth in InP Epitaxy by Alternate Gas Supply

Abstract
Self-limited growth in InP epitaxy was investigated by alternately exposing the substrate to (CH3)3In(TMIn) and PH3. The growth proceeded in the atomic layer epitaxy (ALE) mode at a low temperature of 350°C. The growth rate saturated at about 0.5 monolayers (ML)/cycle, independent of the mole fractions and the exposure times of TMIn and PH3. The surface morphology and thickness uniformity were greatly improved by ALE, indicating the superiority of ALE in the fabrication of ultrathin layers and abrupt interfaces.