Patent ID: 9229314
Filing Date: 2016-01-05
CPC Classification: G01N,G03F

Claim Text:
1. A method of manufacturing a mask comprising the steps of: (a) preparing a mask blank obtained by forming a multi-layered film on a main plane of a substrate; (b) irradiating first extreme ultra-violet (“EUV”) light to the mask blank to detect a phase defect of the mask blank; (c) memorizing a positional coordinate of the phase defect of the mask blank detected in the step of (b) and providing a priority order, which indicates a degree of influence on pattern transfer, to the phase defect of the mask blank; (d) forming an absorber pattern on the multi-layered film to form a mask; and (e) detecting a phase defect of the mask by an inspection device using second EUV light as inspection light, the step of (b) further including the steps of: the step of (d) further including the step of: