Immersion exposure apparatus and device manufacturing method with residual liquid detector
First Claim
1. A lithographic projection apparatus comprising:
- a substrate table by which a substrate is held;
a projection system arranged to project a patterned beam of radiation onto the substrate held by the substrate table;
a liquid supply system that supplies a liquid to a space between the projection system and the substrate held by the substrate table;
a residual liquid detector that detects liquid remaining on the substrate table, or the substrate and the substrate table, after an exposure is completed and while the substrate is held by the substrate table, wherein the residual liquid detector is provided between an exposure station where the patterned beam is projected onto the substrate by the projection system and an unload position where the exposed substrate is unloaded from the substrate table.
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Accused Products
Abstract
A lithographic projection apparatus includes a substrate table configured to hold a substrate, a projection system arranged to project a patterned beam of radiation onto the substrate, a liquid supply system configured to supply liquid to a space between the projection system and the substrate, and a residual liquid detector configured to detect liquid remaining on the substrate and/or the substrate table after an exposure is completed. A device manufacturing method includes projecting, using a projection system of a lithographic apparatus, a patterned beam of radiation through a liquid onto a substrate, the substrate being held by a substrate table, and, after the projecting is complete, detecting residual liquid on the substrate and/or the substrate table.
166 Citations
14 Claims
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1. A lithographic projection apparatus comprising:
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a substrate table by which a substrate is held; a projection system arranged to project a patterned beam of radiation onto the substrate held by the substrate table; a liquid supply system that supplies a liquid to a space between the projection system and the substrate held by the substrate table; a residual liquid detector that detects liquid remaining on the substrate table, or the substrate and the substrate table, after an exposure is completed and while the substrate is held by the substrate table, wherein the residual liquid detector is provided between an exposure station where the patterned beam is projected onto the substrate by the projection system and an unload position where the exposed substrate is unloaded from the substrate table. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device manufacturing method comprising:
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projecting, using a projection system of a lithographic apparatus, a patterned beam of radiation through a liquid onto a substrate, the substrate being held by a substrate table during the projecting; detecting residual liquid on the substrate table, or the substrate and the substrate table, after the projecting is complete and while the substrate is held by the substrate table on a way to an unload position where the exposed substrate is unloaded from the substrate table. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification