Patent ID: 7094484

Claim:
A master carrier for magnetic transfer comprising: a support that has a transfer-recording pattern arrayed in a track direction of said master carrier in accordance with information to be transferred to a magnetic recording medium; and a magnetic layer on said transfer-recording pattern of said support, wherein said master carrier comprises a disk surface having a hill and a valley, which result from a warp of said master carrier; said master carrier has an in-plane distance L (mm) between said hill and said valley with respect to said disk surface, a vertical-direction distance H (μm) between said hill and said valley with respect to said disk surface, and a thickness d (mm); and said in-plane distance L (mm), said vertical-direction distance H (μm), and said thickness d (mm) satisfy the following formula: 0.05≦ H·d 3 /L≦ 0.6.