SPUTTERING TARGET MATERIAL FOR HEAT SINK LAYER FORMATION OF HEAT-ASSISTED MAGNETIC RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a sputtering target material for forming a heat sink layer of a heat-assisted magnetic recording medium with a sputtering method, which demands a high thermal conductivity and a smooth surface.;SOLUTION: This invention is a sputtering target material for a heat sink layer formation of a heat-assisted magnetic recording medium. In the sputtering target material, a compositional formula in an atom ratio is represented by Cu_100-x-y-Zr_x-Cr_y, 0.10≤x≤5.00, 0.10≤y≤1.00, and the remainder is made of inevitable impurities.;COPYRIGHT: (C)2014,JPO&INPIT