Patent ID: 6132113
Filing Date: 2000-10-17
Classification: G03F,H01L

Abstract:
A developer cup, comprising:a bed;a central spindle, vertically and rotatably coupled to a center of the bed through an end of the central spindle;a chuck, vertically coupled to an end of the central spindle opposite to the bed end;an upper coupling, coupled to the central spindle between the chuck and the bed, wherein the chuck, the upper coupling and the bed are coaxial to each other and the chuck, the upper coupling and the bed coaxially and linearly move synchronously through the central spindle;a lower coupling, moveably coupled to the central spindle between the upper coupling and the bed, wherein the upper coupling is separably coupled to the lower coupling; andan annular cup, having an upper wheel and a lower wheel, wherein the upper wheel is aligned with the lower wheel and the upper wheel is coupled to the lower wheel through a plurality of the brackets and the lower wheel is smaller than the upper wheel.