Patent ID: 6955741
Filing Date: 2005-10-18
Classification: C23C,H01L

Abstract:
1. A reaction chamber for processing semiconductor wafers comprising: a support surface for supporting a semiconductor wafer inside the reaction chamber wherein the support surface comprises a plurality vertical through-bores, wafer-lift pins passing through the through-bores wherein a wafer-lift pin comprises a lift member linked with an elevating mechanism for moving the wafer-lift pins vertically between at least an extended position and a retracted position, an elastic component dynamically connected to the lift member, wherein the elastic component biases the lift member towards the retracted position; wherein the head of the wafer-lift pin has a columnar shape and the body is columnar with a diameter smaller than that of the head, and a first step at the boundary between the head and the body, and wherein the lower end of the body of the wafer-lift pin has a flattened profile engaged in a correspondingly shaped hole in the lift member, the combination of which prevents rotation of the wafer-lift pin.