Methods to manufacture contaminant-gettering materials in the surface of
EUV optics are described herein. An optical element is patterned and a
contaminant-gettering material is formed on a surface of the optical
element. In one embodiment, a photoresist is deposited on an optical
coating on the optical element. Trenches are formed in the optical
coating. The gettering agent is formed into the trenches over the
photoresist. Next, the photoresist is removed from the optical coating to
expose the gettering agent in the trenches. For another embodiment,
patches of a nanotube forest having a gettering agent are formed in
designated areas of an optical element. The gettering agent of the
patches may be a plurality of carbon nanotubes. The optical coating is
formed on a substrate between patches of the gettering agent.