Patent ID: 9502237
Filing Date: 2016-11-22
CPC Classification: C23C,H01L

Claim Text:
1. A substrate processing apparatus comprising: a process chamber configured to process a substrate; a gas supply unit configured to independently supply a process gas for processing the substrate to each of a central portion of the substrate and a peripheral portion of the substrate in the process chamber, the gas supply unit comprising: a dispersion plate comprising first gas supply holes facing the peripheral portion of the substrate and second gas supply holes facing the central portion of the substrate; a first gas guide defining a first buffer space in communication with the first gas supply holes; and a second gas guide defining a second buffer space in communication with the second gas supply holes; wherein the second gas guide is disposed in the first gas guide; and an exhaust unit configured to exhaust an inside of the process chamber; and a control unit configured to control the gas supply unit to supply the process gas to the central portion of the substrate after the process gas is supplied to the peripheral portion of the substrate through the gas supply unit.