Patent ID: 9136155
Filing Date: 2015-09-15
Classification: B25B,H01L,Y10T

Abstract:
1. A method for treating a wafer-shaped article, comprising: rotating a wafer shaped article on a spin chuck; said spin chuck comprising a plurality of pins positioned at a periphery of the wafer shaped article, said plurality of pins each comprising a head portion which, in a service position of said pins, extends radially inwardly of and above the wafer shaped article; supplying gas onto a surface of the wafer shaped article facing the spin chuck at a flow rate sufficient to displace the wafer shaped article upwardly into contact with the head portions of the pins, whereby the wafer shaped article is clamped against the head portions of the pins; wherein the pins contact the wafer shaped article only on upwardly oriented wafer surfaces and wherein the wafer shaped article is supported from below solely by said gas.