Patent ID: 9464353
Filing Date: 2016-10-11
CPC Classification: C23C

Claim Text:
1. A substrate processing apparatus including: a chamber comprising a body having an inner space and a top lid provided on an upper part of the body, the top lid having at least one gas input port; a substrate supporting unit rotatably installed inside the chamber to support a plurality of substrates; and a gas injection device comprising a central injection unit provided on an upper part of the substrate supporting unit to inject a gas into a central region of the substrate supporting unit, a source gas injection unit provided around the central injection unit to inject a source gas into the substrate supporting unit, a reaction gas injection unit provided around the central injection unit to inject a reaction gas into the substrate supporting unit and a purge gas injection unit disposed between the source gas injection unit and the reaction gas injection unit; wherein at least one of the source gas injection unit and the reaction gas injection unit comprises a main injection unit to inject a gas into the substrate supporting unit and a gas-injecting projection projecting in a intersectional direction to the main injection unit between the central injection unit and the main injection unit, the main injection unit and the projection are divided into a plurality of regions along a circumference, and the main injection unit or the projection in at least one region inject an amount of gas different than those of the other regions.