摘要:
A substrate holder for use in a lithographic apparatus. The substrate holder comprises a main body (400) and a plurality of burls provided on the main body and having end surfaces to support a substrate. The burls each comprise a lower portion (406a) protruding from the main body and an upper portion (406b) above the lower portion. The lower portions are a different material than the upper portions, the upper portions comprise diamond-like carbon, and the upper portions are separated from each other.
摘要:
An object holder (100) for a lithographic apparatus has a main body (400) having a surface (400a). A plurality of burls (406) to support an object are formed on the surface or in apertures of a thin-film stack (410, 440, 450). At least one of the burls is formed by laser-sintering. At least one of the burls formed by laser-sintering may be a repair of a damaged burl previously formed by laser-sintering or another method.