Abstract:
A substrate holder (100) for a lithographic apparatus has a main body having a thin-film stack (110) provided on a surface thereof. The thin-film stack forms an electronic or electric component such as an electrode, a sensor, a heater, a transistor or a logic device, and has a top isolation layer. A plurality of burls (106) to support a substrate (W) are formed on the thin-film stack or in apertures of the thin-film stack.
Abstract:
A method of manufacturing an object holder (100) for use in a lithographic apparatus, the object holder comprising one or more electrically functional components, the method comprising: using a composite structure comprising a carrier sheet (20) different from a main body (100a) of the object holder and a layered structure comprising one or a plurality of layers (22) and formed on the carrier sheet; connecting the composite structure to a surface of the main body such that the layered structure is between the carrier sheet and the surface of the main body; and removing the carrier sheet from the composite structure, leaving the layered structure connected to the main body.
Abstract:
A support such as a clamp (310) is configured to releasably hold a patterning device such as a reticle (300) to secure it and prevent heat-induced deformation of it. For example, an electrostatic clamp includes a first substrate (312) having opposing first (313) and second (315) surfaces, a plurality of burls (316) located on the first surface and configured to contact the reticle, a second substrate (314) having opposing first (317) and second (319) surfaces. The first surface of the second substrate is coupled to the second surface of the first substrate. A plurality of cooling elements (318) are located between the first surface of the second substrate and the second surface of the first substrate. The cooling elements are configured to cause electrons to travel from the second surface of the first substrate to the first surface of the second substrate. Each cooling element is substantially aligned with a respective burl.
Abstract:
Disclosed is a substrate support for an apparatus of the type which projects a beam of EUV radiation onto a target portion of a substrate (400). The substrate support comprises a substrate table constructed to hold the substrate, a support block (420) for supporting the substrate table, and a cover plate (450') disposed around the substrate table. The top surface of the cover plate and the top surface of a substrate mounted on the substrate table are all substantially at the same level. At least one sensor unit (430) is located on the substrate support and its top surface is also at the same level as that of the cover plate and substrate. Also disclosed is an EUV lithographic apparatus comprising such a substrate support.
Abstract:
Substrate holder (100) for use in a lithographic apparatus, the substrate holder comprising a main body having a first surface and a second surface opposite the first surface.A plurality of first burls are provided on the first surface, the first burls having end surfaces to support a substrate. A plurality of second burls are provided on the second surface to support the substrate holder on a structure. The plurality of first burls each comprise a lower body portion protruding from the first surface and an upper body portion above the lower body portion, the lower body portions comprise a different material from the upper body portions, and the upper body portions comprise diamond-like carbon.
Abstract:
A lithographic apparatus arranged to transfer a pattern from a patterning device onto a substrate, the lithographic apparatus including a substrate table constructed to hold a substrate and a gripper arranged to position the substrate on the substrate table. The gripper includes a vacuum clamp arranged to clamp the substrate at a top side thereof. The vacuum clamp may be arranged to clamp at least part of a circumferential outer zone of the substrate top surface. There is also provided a substrate handling method including positioning the substrate using a gripper on a substrate table of a lithographic apparatus, the method including clamping the substrate at a top side thereof using a vacuum clamp of the gripper.