Source: http://www.google.co.uk/patents/US8830446
Timestamp: 2017-11-24 15:03:56
Document Index: 21590730

Matched Legal Cases: ['Application No. 2006', 'Application No. 2006', 'Application No. 2006', 'Application No. 2009', 'Application No. 2012', 'Application No. 2009', 'Application No. 2010']

Patent US8830446 - Exposure apparatus - Google Patents
An extreme ultraviolet exposure apparatus includes a radiation system configured to supply a beam of extreme ultraviolet radiation; a support configured to support a patterning device, the patterning device configured to pattern the beam of extreme ultraviolet radiation according to a desired pattern;...http://www.google.co.uk/patents/US8830446?utm_source=gb-gplus-sharePatent US8830446 - Exposure apparatus
Publication number US8830446 B2
Application number US 13/928,203
Also published as US7450217, US8542341, US20060152696, US20090027642, US20130286374
Publication number 13928203, 928203, US 8830446 B2, US 8830446B2, US-B2-8830446, US8830446 B2, US8830446B2
Inventors Arjen Boogaard, Timotheus Franciscus Sengers, Wilhelmus Sebastianus Marcus Maria Ketelaars, Carolus Ida Maria Antonius Spee
Patent Citations (107), Non-Patent Citations (28), Classifications (11), Legal Events (1)
US 8830446 B2
An extreme ultraviolet exposure apparatus includes a radiation system configured to supply a beam of extreme ultraviolet radiation; a support configured to support a patterning device, the patterning device configured to pattern the beam of extreme ultraviolet radiation according to a desired pattern; a substrate table having an area configured to support a substrate; a projection system configured to project the patterned beam of extreme ultraviolet radiation onto a target portion of the substrate, the projection system comprising a reflective optical system; wherein at least a part of the apparatus that during use of the apparatus is exposed to the beam of extreme ultraviolet radiation is coated with a coating, the coating comprising a metal oxide, or a photocatalyst, or a semiconductor, or any combination thereof.
a radiation system configured to supply a beam of extreme ultraviolet radiation;
a support configured to support a patterning device, the patterning device configured to pattern the beam of extreme ultraviolet radiation according to a desired pattern;
a substrate table having an area configured to support a substrate;
a projection system configured to project the patterned beam of extreme ultraviolet radiation onto a target portion of the substrate, the projection system comprising a reflective optical system;
wherein at least a part of the apparatus that during use of the apparatus is exposed to the beam of extreme ultraviolet radiation is coated with an outer coating, the outer coating comprising a metal oxide, or a photocatalyst, or a semiconductor selected from the group consisting of: TiO2, SrTiO3, Fe2O3, WO3, and CdS, or any combination thereof, and wherein the part of the apparatus is part of the projection system or includes a sensor on the substrate table.
2. The extreme ultraviolet exposure apparatus according to claim 1, wherein the sensor comprises two transmission image sensors arranged at diagonally opposite positions of the substrate table, the two transmission image sensors being coated by the coating.
3. The extreme ultraviolet exposure apparatus according to claim 2, wherein the transmission image sensors determine vertical and horizontal positions of an aerial image of the projection system.
4. The extreme ultraviolet exposure apparatus according to claim 2, further comprising an alignment system, wherein the transmission image sensors comprise reference markers configured to be detected through the projection system by the alignment system to align the substrate table and the patterning device.
5. The extreme ultraviolet exposure apparatus according to claim 1, wherein the sensor comprises reflection image sensor, the reflective image sensor being coated by the outer coating.
6. The extreme ultraviolet exposure apparatus according to claim 1, wherein the beam of extreme radiation has a wavelength of 5 to 20 nm.
7. The extreme ultraviolet exposure apparatus according to claim 1, wherein the outer coating comprises titanium dioxide.
8. The extreme ultraviolet exposure apparatus according to claim 7, wherein the outer coating comprises, relative to the total weight of the coating, at least 50 wt % titanium dioxide.
9. The extreme ultraviolet exposure apparatus according to claim 1, wherein the outer coating consists of at least one material selected from the group consisting of: TiO2, SrTiO3, Fe2O3, ZnO, ZrO2, WO3, and CdS.
10. The extreme ultraviolet exposure apparatus according to claim 9, wherein the outer coating comprises, relative to the total weight of the coating, at least 95 wt % of the at least one material selected from the group consisting of: TiO2, SrTiO3, Fe2O3, ZnO, ZrO2, WO3, and CdS.
11. The extreme ultraviolet exposure apparatus according to claim 1, wherein the outer coating has a thickness in the range of about 1 to 500 nm.
12. The extreme ultraviolet exposure apparatus according to claim 11, wherein the outer coating has a thickness in the range of about 15 to 100 nm.
13. The extreme ultraviolet exposure apparatus according to claim 1, wherein the outer coating comprises a semiconductor; and a metal oxide or a photocatalyst.
14. A projection system configured to project a beam of extreme ultraviolet radiation onto a target portion of a substrate, the projection system comprising a reflective optical system, wherein at least part of the projection system is provided with an outer coating comprising a metal oxide, or a photocatalyst, or a semiconductor selected from the group consisting of: TiO2, SrTiO3, Fe2O3, WO3 and CdS, or any combination thereof.
15. The projection system according to claim 14, wherein the outer coating comprises titanium dioxide.
16. The projection system according to claim 15, wherein the outer coating comprises, relative to the total weight of the coating, at least 50 wt % titanium dioxide.
17. The projection system according to claim 14, wherein the outer coating consists of at least one material selected from the group consisting of: TiO2, SrTiO3, Fe2O3, ZnO, ZrO2, WO3, and CdS.
18. The projection system according to claim 17, wherein the outer coating comprises, relative to the total weight of the coating, at least 95 wt % of the at least one material selected from the group consisting of: TiO2, SrTiO3, Fe2O3, ZnO, ZrO2, WO3, and CdS.
19. The projection system according to claim 14, wherein the outer coating has a thickness in the range of about 1 to 500 nm.
20. The projection system according to claim 19, wherein the outer coating has a thickness in the range of about 15 to 100 nm.
21. The projection system according to claim 14, wherein the outer coating comprises a semiconductor; and a metal oxide or a photocatalyst.
22. A device manufacturing method in an extreme ultraviolet lithographic apparatus comprising at least a part that is coated with an outer coating, the outer coating comprising a metal oxide, or a photocatalyst, or a semiconductor selected from the group consisting of: TiO2, SrTiO3, Fe2O3, WO3, and CdS, or any combination thereof, the method comprising:
supporting a substrate on a substrate table comprising a sensor;
projecting a patterned beam of extreme ultraviolet radiation onto a target portion of the substrate with a projection system; and
exposing the part to a beam of extreme ultraviolet radiation,
wherein the part is part of the projection system or includes the sensor.
This application is a continuation application of U.S. patent application Ser. No. 12/232,967, filed Sep. 26, 2008, now U.S. Pat. No. 8,542,341, which is a continuation application of U.S. patent application Ser. No. 11/033,485, filed Jan. 12, 2005, now U.S. Pat. No. 7,450,217. Both applications are incorporated herein by reference in their entireties.
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Cooperative Classification G03F7/70916, G03F7/70958, G03B27/42, G03F7/70058, G03F7/7085, G03F7/70716
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BOOGAARD, ARJEN;SENGERS, TIMOTHEUS FRANCISCUS;KETELAARS,WILHELMUS SEBASTIANUS MARCUS MARIA;AND OTHERS;SIGNING DATES FROM 20050427 TO 20050526;REEL/FRAME:030696/0047