Patent ID: 6307619
Filing Date: 2001-10-23
Classification: G03F,H02K

Abstract:
A scanning framing blade apparatus, comprising.a stationary assembly having a plurality of magnets;first and second carriage assemblies, each of said first and second carriage assemblies having a plurality of coils, wherein said first and second carriage assemblies are supported on said stationary assembly by a plurality of air bearings, said air bearings permitting said first and second carriage assemblies to move in only one degree of freedom;first and second framing blades attached to said first and second carriage assemblies, respectively; anda controller coupled to said plurality of coils, wherein said controller is adapted to energize at least one of said plurality of coils, thereby causing at least one of said carriage assemblies and corresponding framing blade to move in said one degree of freedom to control illumination onto a reticle during a substrate scanning process.