Master carrier for magnetic transfer, inspecting method thereof, and magnetic recording medium producing method
AssigneeFuji Photo Film Co., Ltd.
InventorsMasakazu Nishikawa, Naoto Fujiwara
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Abstract
In a master carrier for magnetic transfer which comprises a support that has a transfer-recording pattern arrayed in the track direction thereof in accordance with the information to be transferred to a magnetic recording medium, and a magnetic layer formed on the transfer-recording pattern of the support, the in-plane distance L (mm) between the hill and the valley of the warped master carrier, the vertical-direction distance H (μm) between the two, and the thickness d (mm) of the master carrier are so defined that they satisfy a relation of 0.05≦H·d3/L≦0.6.
Claims7
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·d3/L≦0.6.
Dependencies are inferred from the claim text.