Patent ID: 7247084
Filing Date: 2007-07-24
Classification: B24B

Abstract:
1. An improvement for a wafer carrier having an annular inflatable tube for exerting pressure on an edge of a perforated plate during wafer dechucking, and a flexible plastic tube for supplying pressure to the annular inflatable tube, the improvement comprising a fixed elbow fitting secured to said wafer carrier, said fixed elbow fitting including a body having a first hollow spigot for receiving one end of said flexible plastic tube and a bore extending through said body at a generally right angle to said hollow spigot between a top face of said body and a bottom face of said body, a seal sandwiched between said top face of said body and said wafer carrier, a hollow screw extending through said bore of said body for securing the fixed elbow fitting to the wafer carrier, with a seal between a head of said screw and the bottom face of said body; with said body held clamped in a fixed position by said screw with said spigot in a predetermined orientation, said orientation being such that said flexible plastic tube will not be obstructed in its path between said fixed elbow fitting and said inflatable tube and will not obstruct the bellows operation of said wafer carrier.