Patent ID: 8585823

Claim:
A chemical vapor deposition (CVD) apparatus, comprising a reaction chamber where a deposition space of a wafer is provided; a chamber-supporting portion for supporting the reaction chamber; a shower head for injecting a reaction gas into the reaction chamber; a rotating heater disposed within the reaction chamber for heating a wafer seated thereon; a heater-supporting portion for supporting the rotating heater; a motor for generating a rotational force to rotate the rotating heater; a rotational shaft for transferring the rotational force generated from the motor; a rotational stand mounted on a top end of the rotational shaft for receiving the rotational force from the rotational shaft to rotate the heater, the heater-supporting portion being mounted on the rotational stand and being supported by the rotational stand, the rotational stand is mounted on the rotational shaft and is supported by the rotational shaft, wherein the rotational force from the motor is transferred to the rotational shaft, and the heater-supporting portion and the rotational stand are rotated by the rotational shaft; a rotation seal shaft mounted at a bottom surface of the rotational stand and having a cylindrical shape, wherein the rotational shaft is inserted into the rotation seal shaft to connect to the rotational stand; a seating portion retained in a feed plate of a feeding portion such that the seating portion moves upwardly with the feed plate and moves downwardly with the feed plate; a lower support at a bottom surface of the seating portion, wherein the motor, the rotational shaft and the rotation seal shaft are installed in the lower support such that the rotational force from the motor is not provided to the lower support; and an air-tight sealing member between the rotation seal shaft and the lower support so as to maintain air-tightness.