Lithographic apparatus and device manufacturing method
First Claim
Patent Images
1. A lithographic projection apparatus comprising:
- a substrate table configured to hold a substrate;
a projection system arranged to project a patterned beam of radiation onto a radiation sensitive target portion of the substrate; and
a liquid supply system configured to provide a liquid to a space between the substrate table and the projection system, the liquid having a pH of less than 7, the liquid supply system comprising a structure located between the substrate table and an optical element of the projection system nearest the substrate table and in contact, in use, with the liquid, the structure comprising;
an inlet to supply the liquid to between the structure and the projection system, andan outlet to remove the liquid from between the structure and the substrate table.
1 Assignment
0 Petitions
Accused Products
Abstract
A lithographic apparatus and device manufacturing method is provided in which exposure is carried out by projecting through a liquid having a pH of less than 7, the liquid being in contact with a substrate to be exposed. The liquid advantageously comprises an anti-reflective topcoat.
-
Citations
20 Claims
-
1. A lithographic projection apparatus comprising:
-
a substrate table configured to hold a substrate; a projection system arranged to project a patterned beam of radiation onto a radiation sensitive target portion of the substrate; and a liquid supply system configured to provide a liquid to a space between the substrate table and the projection system, the liquid having a pH of less than 7, the liquid supply system comprising a structure located between the substrate table and an optical element of the projection system nearest the substrate table and in contact, in use, with the liquid, the structure comprising; an inlet to supply the liquid to between the structure and the projection system, and an outlet to remove the liquid from between the structure and the substrate table. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A device manufacturing method comprising:
-
supplying a liquid onto a radiation-sensitive resist on a substrate, the liquid having a pH of less than 7 and comprising water and a carbon containing compound; and projecting a patterned beam of radiation, through the liquid, onto a target portion of the radiation-sensitive resist on the substrate. - View Dependent Claims (11, 12, 13, 14)
-
-
15. A lithographic projection apparatus comprising:
-
a substrate table configured to hold a substrate; a projection system arranged to project a patterned beam of radiation onto a radiation sensitive target portion of the substrate; and a liquid supply system configured to provide a liquid to a space between the projection system and the substrate, the liquid having a pH of less than 7 and the liquid comprising water and a carbon containing compound; and a source having, in use, the carbon containing compound. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification