Exposure apparatus, device manufacturing method, maintenance method, and exposure method
First Claim
Patent Images
1. An exposure apparatus which exposes a substrate by irradiating exposure light onto the substrate via a projection optical system and a liquid, comprising:
- a measuring device which measures an elapsed time of a non-immersed state;
a liquid supply system having a flowpath that supplies the liquid onto the substrate; and
a control device that causes the flowpath to be cleaned when the elapsed time exceeds a predetermined allowable time.
0 Assignments
0 Petitions
Accused Products
Abstract
An exposure apparatus can prevent disadvantages of supplying liquid of reduced cleanliness and formation of watermarks. The exposure apparatus exposes a substrate by irradiating exposure light onto the substrate via a projection optical system and a liquid, and includes a liquid supply mechanism for supplying the liquid, and a measuring device which measures a time during which the supply of the liquid from the liquid supply mechanism is stopped.
27 Citations
28 Claims
-
1. An exposure apparatus which exposes a substrate by irradiating exposure light onto the substrate via a projection optical system and a liquid, comprising:
-
a measuring device which measures an elapsed time of a non-immersed state; a liquid supply system having a flowpath that supplies the liquid onto the substrate; and a control device that causes the flowpath to be cleaned when the elapsed time exceeds a predetermined allowable time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A maintenance method of an exposure apparatus having a projection optical system which projects an image of a pattern via a liquid onto a substrate, the method comprising:
-
measuring an elapsed time of a non-immersed state; and cleaning a flowpath of a liquid supply system that supplies the liquid to the substrate when the elapsed time exceeds a predetermined allowable time. - View Dependent Claims (14, 15, 16)
-
-
17. An exposure apparatus which exposes a substrate by irradiating exposure light onto the substrate via a protection optical system and a liquid, comprising:
-
a measurement device which measures an elapsed time of a non-immersed state of the projection optical system; and a control device that causes the generation of a warning signal when the elapsed time exceeds a predetermined allowable time. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
-
Specification