METHOD OF MANUFACTURING ANTIREFLECTION FILM

• Main Authors: HASHIMOTO KOJI, YOSHIHARA HIROKAZU
• Format: Patent
• Language: English
• Published: 05.12.2013
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PERFORMING OPERATIONS; PHYSICS; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a method of manufacturing an antireflection film having high surface strength in a simple manner without requiring large scale facilities.SOLUTION: A method of manufacturing an antireflection film includes: a coating step for forming a coated layer comprising two or more laminated layers by applying simultaneous multi-layer coating on a transparent base material using two or more types of coating fluid containing binder and a high boiling point solvent; and a heating step for heating the coated layer formed by simultaneous multi-layer coating method. A coating fluid for an uppermost layer contains a low boiling point solvent while a coating fluid for an adjacent layer either contains no low boiling point solvent or less low boiling point solvent than the coating fluid for the uppermost layer. In the heating step, the coated layer is heated at temperature no less than a boiling point of the low boiling point solvent and less than a boiling point of the high boiling point solvent to cause the low boiling point solvent to bump, thereby forming microvoids in the coated layer.