Patent ID: 7162881
Filing Date: 2007-01-16
Classification: G03F,H01L

Abstract:
1. A method for supporting an object using an apparatus such that particle contamination of a first surface and a second surface of the object is minimized, the object having a first temperature, the apparatus including a first cold plate, a contact surface, at least a first opening defined within the first cold plate, and a vacuum source, the method comprising: maintaining the first cold plate of the apparatus at a second temperature, the second temperature being less than the first temperature; positioning the apparatus in proximity to the first surface of the object such that the first surface of the object faces the apparatus; allowing a first thermophoretic force to convey any particles present between the first surface of the object and the apparatus away from the first surface of the object; and applying a vacuum of a first level through the first opening using the vacuum source to secure the first surface of the object against the contact surface.