Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic apparatus where alignment is easy and reliable, and to provide a device-manufacturing method. SOLUTION: A lithographic projection apparatus has an alignment sensor comprising an electron beam supply source 10 for supplying an electron beam 12 for impinging on an alignment mark 14 on a substrate W, and a back- scattered electron detector 16 for detecting electrons being back-scattered from the alignment marker 14. The alignment sensor is independent of the projection system and projection radiation, and is an off-axis alignment sensor. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic apparatus in which it is unlikely that the lifetime of optical elements is reduced due to etching and sputtering caused by ionization of the background gas. SOLUTION: An optically activated device configured so as to guide radiation beam or patterned radiation beam M and a support structure 12, configured so as to support optically activated devices M1 to M6 are provided; and further, a gas supplier 14 for supplying a background gas 16 to a system is also provided. The radiation beam or the patterned radiation beam and the background gas react, and a plasma containing a plurality of ions is formed. The support structure comprises an element 20, provided with a material with a small sputter rate, a material with a large sputter threshold energy, or a material with a large ion implantation yield, in order to suppress the sputtering and the generation of sputtering product. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
A lithographic projection apparatus includes an alignment sensor having an electron beam source constructed and arranged to provide an electron beam for impinging on an alignment marker on a substrate, and a back-scattered electron detector constructed and arranged to detect electrons back-scattered from the alignment marker. The alignment sensor is independent of the projection system and projection radiation, and is an off-axis alignment sensor.