Patent ID: 8466077

Claim:
A sputtering target for forming a ZrO 2 —In 2 O 3 based protective film for an optical storage medium, having excellent resistance to cracking, and having a component composition made of Zr a In b A c O 100-a-b-c where “A” represents one, two, or more selected from the group consisting of Si, Cr, Al, Ce, Ti, and Sn, “a” represents an amount greater than 5 atomic percent and less than 23 atomic percent, “b” represents an amount greater than 12 atomic percent and less than 35 atomic percent, and “c” represents an amount greater than 0 and less than 30 atomic percent, wherein 90% or more of Zr that is included in the sputtering target for forming the protective film for the optical storage medium is in an oxidative product phase in which Zr and In are combined, and is dispersed in a base material of the target.