Patent Number: 
Section: claims

1. A movable carriage for moving an article support member in a lithographic apparatus, said article support member constructed and arranged to move and support an article to be placed in a beam path of said lithographic apparatus, said carriage comprising a compartmented composite structure. 2. A movable carriage according to claim 1, wherein said carriage is constructed and arranged to provide an interface between a long stroke and a short stroke actuator in the lithographic apparatus, and wherein said carriage further comprises a first sensor for driving said long stroke actuator and a second sensor, positioned at a distance from said first sensor, for driving said short stroke actuator so as to arrange said article to be placed on a predetermined location. 3. A movable carriage according to claim 1, further comprising a non-composite mounting interface and/or cooling interface for mounting and/or cooling a short stroke actuator. 4. A movable carriage according to claim 3, wherein said carriage is uncooled. 5. A movable carriage according to claim 3, wherein said non-composite mounting interface comprises a metal and/or ceramic material glued to said composite material. 6. A movable carriage according to claim 3, wherein said cooling interface comprises a metal cooling surface. 7. A movable carriage according to claim 6, wherein said metal cooling surface is coupled to a duct for ducting coolant. 8. A movable carriage according to claim 7, wherein said duct comprises a composite material. 9. A movable carriage according to claim 1, wherein said composite is chosen from a group of low coefficient of thermal expansion (CTE) materials. 10. A movable carriage according to claim 9, wherein said composite comprises carbon fiber. 11. A movable carriage according to claim 1, wherein said composite structure comprises at least one composite box structure. 12. A movable carriage according to claim 11, wherein said box structure comprises a base plate and upstanding contours. 13. A movable carriage according to claim 12, wherein the upstanding contours are integral with the base plate. 14. A movable carriage according to claim 12, wherein the upstanding contours comprise an L-form extremal mounting profile for gluing to a cover plate. 15. A movable carriage according to claim 11, wherein said composite box structure comprises a rectangular outer box and a triangular inner box provided in said outer box. 16. A movable carriage according to claim 11, wherein said composite box structure comprises a composite rib structure. 17. A movable carriage according to claim 16, wherein said rib structure is glued to the box structure. 18. A movable carriage according to claim 17, wherein said rib structure comprises an L-form extremal mounting profile for gluing to a cover plate. 19. A movable carriage according to claim 1, wherein said composite structure comprises a plurality of boxed compartments glued together.