METHOD FOR MANUFACTURING PATTERNED REFLECTION LAYER, DIFFRACTIVE STRUCTURED-BODY AND MEDIUM HAVING DIFFRACTIVE STRUCTURED-BODY

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a patterned reflection layer by which the low production efficiency of a conventional method for manufacturing by scanning and laser processing is improved in the processing rate by using a photomask so that a patterned reflection layer with excellent mass productivity is formed on a reflection layer of a diffractive structured-body, and to provide a diffractive structured-body obtained by the above method, and to provide a medium having the diffractive structured-body. SOLUTION: The method for manufacturing a patterned reflection layer is carried out by making the laser light emitted from a laser light source pass through a photomask in which a desired image is formed so as to partly block the laser light and by forming the image on the reflection layer of a diffractive structured-body to partially destroy the layer to form a patterned reflection layer. The diffractive structured-body is obtained by the above method and the medium has the above diffractive structured-body.