Patent ID: 8293071
Filing Date: 2012-10-23
Classification: H01L

Abstract:
1. A spin head for receiving a substrate, comprising: a body; chuck pins disposed at the body and protruding upward from the body; and a chuck pin moving unit configured to move the chuck pins between supporting positions and rest positions for supporting an edge of a substrate placed at the spin head by moving the chuck pins to the supporting positions and allowing a substrate to be placed at the body by moving the chuck pins to the rest positions that are more distant from a center of the body than the supporting positions; wherein the chuck pin moving unit comprises: movable rods fixed to the chuck pins; a rotatable cam comprising protrusions on an outer surface thereof so as to move the chuck pins from the supporting positions to the rest positions; and chuck pin return units applying forces to the movable rods, respectively, so as to move the chuck pins individually from the rest positions to the supporting positions.