METHOD OF MANUFACTURING OPTICALLY STRUCTURED LAYER

摘要

PURPOSE: To improve dimensional stability of a mask and to easily produce at a low cost by using a material having holes which does not transmits light as an exposure mask. CONSTITUTION: A material (A) which does not transmit light and has holes is used as an exposure mask to expose a positive photoresist (B). The material (A) is preferably a colored thick paper or a base material lined with copper and is preferably 0.01 to 5mm thick. Moreover, the diameter of the holes of the material (A) is preferably made larger than the diameter of the holes in the base material to be exposed. As for the resist (B), a thermosetting epoxy resin compsn. is preferably used.