EN
Orientation effects during heteroepitaxy appear at the stage of the layer formation and also during the isothermal contact of the multicomponent solution with the binary substrate. In the paper, the analysis of the InP and GaP substrate orientation on the state of liquid phase was carried out. The analysis based on the in situ comparative determination of the contact supersaturation of the Ga-In-P-As and Ga-In-P solutions. It was found that the contact supersaturation of the alloy was connected with the coupling mechanism of the interface with the binary substrate.