Patent ID: 7790229
Filing Date: 2010-09-07
Classification: C23C,Y10T

Abstract:
1. A method for adjusting a spacing between a leveling plate and a chamber body, the method comprising: making a coarse adjustment of the spacing by rotating a first threaded surface of an adjustment screw with respect to a stud threaded surface of a mounting stud to move the adjustment screw in a first direction with respect to the mounting stud; and making a fine adjustment of the spacing by rotating the first threaded surface of the adjustment screw with respect to the stud threaded surface of the mounting stud to move the adjustment screw in the first direction with respect to the mounting stud, and rotating a second threaded surface of the adjustment screw with respect to a bushing threaded surface of a bushing to move the adjustment screw with respect to the bushing in a second direction opposite the first direction, wherein the bushing rotates with the adjustment screw during the coarse adjustment and the bushing is fixed to the leveling plate during the fine adjustment, and a rate of the coarse adjustment is determined by a first connection between the first threaded surface and the stud threaded surface, and a rate of the fine adjustment is determined by the first connection between the first threaded surface and the stud threaded surface and a second connection between the second threaded surface and the bushing threaded surface.