Patent ID: 7573634

Claim:
A micromechanical mirror with a high-reflection coating for deep-ultraviolet (DUV) and vacuum-ultraviolet (VUV) spectral ranges, comprising: a substrate; an aluminium layer deposited on the substrate; at least one transparent blooming coating covering the aluminum layer, the blooming coating comprising a fluoride layer, an oxide layer and/or mixed layers thereof; and at least one compensation layer for stress compensation selected from the group consisting of mixed oxides, Si x Al y O z N (1−x−y−z) with 1>x>0.05, 1>y>0, 1>z>0 and 1>x+y>0.7, Ti x Al y O z N (1−x−y−z) with 1>x>0.05, 1>y>0, 1>z>0 and 1>x+y>0.7, Ta x Si y O z N (1−x−y−z) with 1>x>0.05, 1>y>0, 1>z>0 and 1>x+y>0.7, Mo x Si y O z N (1−x−y−z) with 1>x>0.05, 1>y>0, 1>z>0 and 1>x+y>0.7 and Co x Si y O z N (1−x−y−z) with 1>x>0, 1>y>0, 0.3>z>0 and 1>x+y>0.7, wherein the mirror has a high reflectance R of at least 70% at a wavelength in the DUV and VUV spectral ranges with simultaneously high planarity D of maximum λ/4.