Lithographic apparatus, removable member and device manufacturing method
A sealing member is provided to prevent immersion liquid ingress to a gap between components. The sealing member has a plastic or polymer sealing portion that is adhered to the components forming the gap being sealed. The sealing member is constructed so as to reduce the force-coupling, in particular the time-related force-coupling, between the components being sealed.
1. A sealing member kit for sealing a gap formed between at least two surfaces of an immersion lithographic apparatus from immersion liquid ingress, the sealing member kit comprising:
a plastic material or polymeric sealing portion sized to cover the gap; and
an adhesive portion to attach the sealing portion to at least one of the surfaces of the immersion lithographic apparatus, the adhesive portion being on only one side of the sealing portion,
wherein the stiffness of the sealing portion is no more than 100% of the stiffness of the adhesive portion.
2. The sealing member kit according to claim 1 , wherein the Young's modulus of the material of the sealing portion is no more than or equal to a factor of 5×10 5 times the Young's modulus of the material of the adhesive portion.
3. The sealing member kit according to claim 1 , wherein the viscous damping coefficient of the material of the adhesive portion is less than or equal to 2×10 6 Ns/m.
4. The sealing member kit according to claim 1 , wherein the Young's modulus of the material of the adhesive portion is greater than or equal to 2 MPa.
5. The sealing member kit according to claim 1 , wherein the Young's modulus of the material of the plastic material or polymeric sealing portion is less than or equal to 5 GPa.
6. The sealing member kit according to claim 1 , wherein the material of the plastic material or polymeric sealing portion comprises polyimide, PET, PTFE, polyetheretherketone, polyaryletheretherketone, or polysiloxane.
7. The sealing member kit according to claim 1 , wherein the material of the adhesive portionlayer comprises a silicone adhesive or an acrylic adhesive.
8. The sealing member kit according to claim 1 , wherein the plastic material or polymeric sealing portion is opaque to DUV radiation.
9. The sealing member kit according to claim 1 , wherein the upper surface of the plastic material or polymeric sealing portion is lyophobic.
10. The sealing member kit according to claim 1 , wherein the plastic material or polymeric sealing portion has a first surface and a second surface, and comprises:
a layer of plastic material or polymer to which the adhesive portion adheres; and
an opaque layer adjacent the layer of plastic material or polymer and between the layer of plastic material or polymer and the first surface of the sealing portion, the opaque layer being opaque to DUV radiation.
11. The sealing member kit according to claim 1 , wherein the plastic material or polymeric sealing portion has a first surface and a second surface, and comprises:
an opaque layer to which the adhesive portion adheres, the opaque layer being opaque to DUV radiation; and
a lyophobic layer of plastic material or polymer adjacent the opaque layer, the lyophobic layer of plastic material or polymer forming the first surface of the sealing portion.
12. The sealing member kit according to claim 1 , wherein the plastic material or polymeric sealing portion has a first surface and a second surface, and comprises a lyophobic layer of plastic material or polymer to which the adhesive portion adheres, the lyophobic layer of plastic material or polymer being opaque to DUV radiation.
13. The sealing member kit according to claim 1 , wherein the sealing portion is impermeable to liquid.
14. The sealing member kit according to claim 1 sealing the gap between a substrate table of an immersion lithographic apparatus and a sensor positioned on the substrate table.
15. The sealing member kit according to claim 1 sealing the gap formed between a substrate table of an immersion lithographic apparatus and a substrate support of the immersion lithographic apparatus, the substrate support configured to support a substrate.
16. A sealing member comprising:
a plastic material or polymeric sealing portion; and
an adhesive portion to attach the sealing portion to a surface of an immersion lithographic apparatus, the adhesive portion being on only one side of the sealing portion,
wherein the stiffness of the sealing portion is no more than 100% of the stiffness of the adhesive portion.
17. An immersion lithographic apparatus comprising the sealing member according to claim 16 .
18. A method of sealing a gap between a first surface and a second surface of an immersion lithographic apparatus comprising adhering a sealing member to the first surface and to the second surface, thereby bridging the gap between the first and second surfaces of the immersion lithographic apparatus, the sealing member having a plastic material or polymeric sealing portion and an adhesive portion to attach the sealing portion to a surface of an immersion lithographic apparatus, the adhesive portion being on only one side of the sealing portion, wherein the stiffness of the sealing portion is no more than 100% of the stiffness of the adhesive portion.
19. A sealing member sealing a gap formed between two surfaces of an immersion lithographic apparatus from immersion liquid ingress, the sealing member comprising:
a plastic material or polymeric sealing portion covering the gap; and
an adhesive attaching the sealing portion to at least one of the surfaces of the immersion lithographic apparatus, the at least one surface being next to an end of the gap and the adhesive being on only one side of the sealing portion,
wherein the damping constant of the adhesive is less than or equal to 2×10 6 Ns/m.
20. A sealing member kit for sealing a gap formed between at least two surfaces of an immersion lithographic apparatus from immersion liquid ingress, the sealing member comprising:
a plastic material or polymeric sealing portion covering the gap; and
an adhesive attaching the sealing portion to at least one of the surfaces of the immersion lithographic apparatus, the at least one surface being next to an end of the gap and the adhesive being on only one side of the sealing portion,
wherein the Young's modulus of the adhesive is greater than or equal to 2 MPa.