Patent ID: 9558936
Date: 2017-01-31
CPC Classifications: C23C,H01L

Claim:
1. A semiconductor manufacturing apparatus comprising: an accommodation module configured to accommodate a substrate, a first flow channel including first openings configured to emit a first gas into the accommodation module; a second flow channel including second openings configured to emit the first gas into the accommodation module, a number or a size of the second openings being different from a number or a size of the first openings; a third flow channel including third openings configured to emit the first gas into the accommodation module, a number or a size of the third openings being different from the number or the size of the first openings and the number or the size of the second openings; and a controller configured to control supplying of the first gas to the first, second and third flow channels such that the first gas is emitted from the first openings at a first flow velocity, the first gas is emitted from the second openings at a second flow velocity different from the first flow velocity, and the first gas is emitted from the third openings at a third flow velocity different from the first and second flow velocities.