Patent ID: 8714169

Claim:
A spin head comprising: a body; chuck pins protruding upward from the body; and a chuck pin moving unit configured to move the chuck pins between supporting positions where a lateral portion of a substrate placed on the spin head is supported and waiting positions that are farther from a center of the body than the supporting positions are so as to allow the substrate to be placed on the body, wherein the chuck pin moving unit includes: pivot pins; and rotation rods, each of which is coupled with each of the chuck pins, each of the rotation rods comprising: a first part that is a region coupled with a corresponding chuck pin with respect to a corresponding pivot pin of the pivot pins; and a second part that is an opposite region to the first part with respect to the corresponding pivot pin, wherein the second part includes: a first region; and a second region that is farther from the first part than the first region is and is lower than the first region, wherein a top line portion of the second region is parallel to a top line portion of the first region, wherein the second part further includes a third region extending from the first region to the second region, wherein the first part comprises a top line portion extending from the top line portion of the first region and parallel to the top line portion of the second region, and the top line portion of the first part is higher than the top line portion of the second region of the second part, and wherein each of the pivot pins is fixing each of the rotation rods to the body; and a driving member rotating the rotation rods about the pivot pins as a rotation shaft.