Patent ID: 8772077
Filing Date: 2014-07-08
Classification: C23C

Abstract:
1. A method of forming a chalcogenide thin film, the method comprising: loading a substrate in which a pattern is formed, into a reactor; supplying a source gas to the substrate; supplying a first purge gas to the substrate so as to purge the source gas supplied to the substrate; supplying a reaction gas that is used to reduce the source gas, to the substrate; supplying a second purge gas to the substrate so as to purge the reaction gas supplied to the substrate; and repeatedly performing a cycle comprising the supplying of the source gas through the supplying of the second purge gas, wherein the source gas is formed of one or more selected from the group including germanium (Ge)-based gas, gallium (Ga)-based gas, indium (In)-based gas, selenium (Se)-based gas, antimony (Sb)-based gas, tellurium (Te)-based gas, tartar (Sn)-based gas, silver (Ag)-based gas, and sulfur (S)-based gas, and wherein at least one of a time changing operation by which a supply time of the first purge gas is changed whenever the cycle is repeated and a pressure adjustment operation by which the pressure in the reactor is adjusted during the supply of the first purge gas is performed so that a deposition rate of an inside of the pattern is greater than that of an upper portion of the pattern; and between the loading of the substrate and the supplying of the source gas, processing a surface of the substrate by generating plasma in the substrate by using a gas containing fluorine (F).