Lithographic apparatus and device manufacturing method
First Claim
Patent Images
1. A lithographic apparatus, comprising:
- an illumination system configured to condition a radiation beam;
an array of individually controllable elements configured to pattern the radiation beam;
a plurality of minors disposed between the illumination system and the array of individually controllable elements, wherein respective ones of the plurality of mirrors are configured to project the radiation beam onto corresponding elements in the array of individually controllable elements; and
a projection system configured to project the patterned radiation beam onto a target portion of a substrate,wherein the radiation beam is arranged to illuminate the array of individually controllable elements non-perpendicularly and non-telecentrically, and wherein the array of individually controllable elements changes an optical axis and the telecentricity of the radiation beam.
1 Assignment
0 Petitions
Accused Products
Abstract
A system and method are used to direct a radiation beam to illuminate non-perpendicularly a patterning array of individually controllable elements used for patterning the radiation beam. The individually controllable elements can change a telecentricity of the radiation beam. Projection of the radiation beam onto the individually controllable elements can be by a concave mirror or use a folding mirror placed in an object field of the individually controllable elements. Alternatively, the individually controllable elements can change the optical axis of the radiation beam.
-
Citations
10 Claims
-
1. A lithographic apparatus, comprising:
-
an illumination system configured to condition a radiation beam; an array of individually controllable elements configured to pattern the radiation beam; a plurality of minors disposed between the illumination system and the array of individually controllable elements, wherein respective ones of the plurality of mirrors are configured to project the radiation beam onto corresponding elements in the array of individually controllable elements; and a projection system configured to project the patterned radiation beam onto a target portion of a substrate, wherein the radiation beam is arranged to illuminate the array of individually controllable elements non-perpendicularly and non-telecentrically, and wherein the array of individually controllable elements changes an optical axis and the telecentricity of the radiation beam. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A device manufacturing method, comprising:
-
using a respective one of a plurality of mirrors to project a radiation beam onto a corresponding element of an array of individually controllable elements; patterning the radiation beam using the array of individually controllable elements; changing an optical axis and a telecentricity of the radiation beam using the corresponding element of the array; and projecting the patterned beam of radiation onto a substrate using a projection system. - View Dependent Claims (8, 9, 10)
-
Specification