Patent ID: 9666459
Date: 2017-05-30
CPC Classifications: C23C,H01L

Claim:
1. A wafer processing apparatus, comprising: a reaction tube extending in a vertical direction; a door plate under the reaction tube to seal the reaction tube, the door plate configured to load a boat into the reaction tube and support a plurality of wafers; a cap plate on the door plate, the cap plate including a cylindrical body, a guiding recess and a first protruding portion, the first protruding portion and the cylindrical portion forming one body, the cap plate is not rotatable, the cylindrical body configured to surround a lower side surface of the boat, the guiding recess in an outer surface of the cylindrical body along a circumferential direction of the cylindrical body, the first protruding portion configured to be inserted between a side surface of a lower portion of the boat and a side surface of a flange; at least one first nozzle in a lower portion of the reaction tube, the at least one first nozzle configured to supply a first gas in the reaction tube, the at least one first nozzle having at least one distal end portion, the at least one distal end portion penetrates through the flange to extend into the guiding recess of the cap plate; and an exhaust portion configured to remove the first gas from the reaction tube through the guiding recess.