METHOD FOR PRODUCING SPUTTERING TARGET, AND METHOD FOR MANUFACTURING OPTICAL MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a sputtering target capable of enhancing recording reliability of an optical medium.

SOLUTION: The optical medium sputtering target has an interference film 24 composed essentially of SiO2and ZnO and is formed by the method for producing the sputtering target including: a crushing step for crushing quartz particles in a ball mill provided with a quartz glass vessel and a quartz glass ball; a mixing step for adding ZnO particles into the ball mill after the crushing step and mixing the crushed quartz particles and the ZnO particles in the ball mill to obtain a mixture; and a step for sintering the mixture.

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