Patent ID: 7635263

Claim:
A chucking system to hold a first portion of a substrate and simultaneously bow a second portion of the substrate, comprising: a chuck body having first and second opposed sides, the first side including an array of fluid chambers arranged in rows and columns, the array of fluid chambers including a first fluid chamber in superimposition with the first portion of the substrate and a second fluid chamber in superimposition with the second portion of the substrate, each fluid chamber comprising first and second spaced-apart recesses defining first and second spaced-apart support regions, with the first support region cincturing the second support region and the first and second recesses, and the second support region cincturing the second recess, with the substrate capable of resting against the first and second support regions, such that the first recess and a portion of the substrate in superimposition therewith define a first chamber and the second recess and a portion of the substrate in superimposition therewith define a second chamber, with each of the first chambers and each of the second chambers being in fluid communication with a differing source of fluid to control a flow of fluid in the array of fluid chambers, the first chamber of the first fluid chamber in a vacuum state and wherein the second chamber of the first fluid chamber and the first chamber and the second chamber of the second fluid chamber in a pressure state.