Patent ID: 7577079
Filing Date: 2009-08-18
Classification: G11B

Abstract:
1. A master disk for magnetic transfer, including a master substrate which is comprised of metal material having a crystal structure of face-centered cubic lattice and has a concavo-convex pattern corresponding to transfer information formed thereon, and a magnetic layer film-formed on the concavo-convex pattern of the master substrate, comprising: a X-ray diffraction pattern of the master substrate having a 200 plane reflection at 2θ=51.0° to 53.0°, and a 220 plane reflection at 2θ=75.5° to 76.5°, when incident angle of X-ray is designated by θ; and a reflection intensity ratio of the 220 plane with respect to the 200 plane which is I[220]/I[200]=2 to 30, when the reflection intensity of the 200 plane X-ray diffraction is designated by I[200] and the reflection intensity of the 220 plane X-ray diffraction is designated by I[220].