METHOD FOR REGENERATING GLASS SUBSTRATE FOR COLOR FILTER

摘要

PROBLEM TO BE SOLVED: To provide a method for regenerating a glass substrate for color filter by removing stacked thin films efficiently and economically and also favorably in an environmental viewpoint from defective color filter substrates produced in a process for manufacturing color filters.

SOLUTION: This method is the reproducing method of a glass substrate for color filter on the surface of which a light shielding layer which consists of metal or metal compound thin film is formed is characterized by reusing used solution of the etching liquid which is used in order to form the light shielding layer by performing the patterning of the metal or the metal compound thin film layer in the manufacturing process as stripping liquid for removing the light shielding layer which is formed on the surface of the glass substrate. Further, it is preferred to provide a process for carrying out alkaline treatment of the glass substrate after the removing process of the light shielding layer in which the used solution of the etching liquid is used.

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