Patent Number: 
Section: claims

1. Apparatus comprising:a first member adapted to be coupled to a frame;a second member;an EUV target material dispenser mechanically coupled to the second member and adapted to dispense an EUV target material; anda coupling system mechanically coupling the first member to the second member, wherein the coupling system comprises a first coupling subsystem configured to constrain translational movement of the second member with respect to the first member while permitting tilting movement of the second member with respect to the first member, and a second coupling subsystem adapted to control an amount of tilting of the second member with respect to the first member and so to affect a position of a release point of EUV target material from the EUV target material dispenser, the first coupling subsystem comprising a plurality of first coupling subsystem elements mechanically coupling said first member to said second member, each of said first coupling subsystem elements comprising at least one flexure. 2. Apparatus as claimed in claim 1 wherein said first member is substantially plate shaped. 3. Apparatus as claimed in claim 1 wherein said first member is substantially plate-shaped, and wherein said second member is substantially plate shaped. 4. Apparatus as claimed in claim 1 wherein the second coupling subsystem comprises a plurality of second coupling subsystem elements mechanically coupling said first member to said second member. 5. Apparatus as claimed in claim 4 wherein each of said second coupling subsystem elements comprises at least one first flexure. 6. Apparatus as claimed in claim 5 wherein said at least one first flexure is a cartwheel flexure. 7. Apparatus as claimed in claim 5 wherein each of said second coupling subsystem elements comprises at least one second flexure coupled to said at least one first flexure. 8. Apparatus as claimed in claim 7 wherein said at least one second flexure is a parallelogram flexure. 9. Apparatus comprising:a first member adapted to be coupled to a frame;a second member;an EUV target material dispenser mechanically coupled to the second member; anda coupling system mechanically coupling the first member to the second member, wherein the coupling system comprises a first coupling subsystem configured to constrain translational movement of the second member with respect to the first member while permitting tilting movement of the second member with respect to the first member, and a second coupling subsystem adapted to control an amount of tilting of the second member with respect to the first member and so to affect a position of a release point of EUV target material from the EUV target material dispenser,wherein each of said second coupling subsystem elements comprises at least one first flexure and at least one linear motor coupled to said first member and to said first flexure. 10. Apparatus as claimed in claim 9 wherein each of said second coupling subsystem elements comprises at least one second flexure coupled to said at least one first flexure. 11. Apparatus as claimed in claim 10 wherein each of second coupling subsystem elements comprises at least piezoelectric element coupled to said second member and to said at least one second flexure. 12. Apparatus comprising:a plate-shaped first member adapted to a coupled to a frame;a plate-shaped second member;a dispenser mechanically coupled to the second member and adapted to dispense an EUV target material; anda coupling system mechanically coupling the first member to the second member, wherein the coupling system comprisesa first coupling subsystem configured to constrain translational movement of the second member with respect to the first member while permitting tilting movement of the second member with respect to the first member, said first coupling subsystem including a plurality of first coupling subsystem elements, each of said first coupling subsystem elements comprising at least one flexure, anda second coupling subsystem adapted to control an amount of tilting of the second member with respect to the first member,said first coupling subsystem including a plurality of first coupling subsystem elements, each of said first coupling subsystem elements comprising at a linear combination of a stepper motor coupled to said first member, a first flexure coupled to said stepper motor, a second flexure coupled to said first flexure, and a piezoelectric actuator coupled to said second flexure and to said second member. 13. Apparatus comprising:a first member adapted to be coupled to a frame;a second member;an EUV target material dispenser mechanically coupled to the second member, a relative position of the first member and the second member affecting a position of a release point of EUV target material from the EUV target material dispenser; anda coupling system mechanically coupling the first member to the second member, wherein the coupling system comprises at least one flexure. 14. Apparatus comprising:a first member adapted to be coupled to a frame;a second member;an EUV target material dispenser mechanically coupled to the second member and adapted to dispense an EUV target material from a release point, the first member and the second member having a common axis passing through the release point and substantially perpendicular to the first member and the second member when the second member is in a first position with respect to the first member; anda coupling system mechanically coupling the first member to the second member, wherein the coupling system comprises a first coupling subsystem configured to constrain lateral movement of the second member with respect to the first member while permitting rotation of the second member such that the release point is not on the axis, the coupling system comprising a plurality of coupling system elements mechanically coupling said first member to said second member, each of said coupling system elements comprising at least one flexure; anda second coupling subsystem adapted to control rotation of the second member. 15. Apparatus as claimed in claim 1 wherein the EUV target material dispenser is a droplet generator adapted to dispense EUV target material in droplet form. 16. Apparatus as claimed in claim 12 wherein the dispenser is a droplet generator. 17. Apparatus as claimed in claim 13 wherein the EUV target material dispenser is a droplet generator adapted to dispense EUV target material in droplet form. 18. Apparatus as claimed in claim 14 wherein the EUV target material dispenser is a droplet generator adapted to dispense EUV target material in droplet form.