Patent ID: 8300340

Claim:
A disk-like magnetic recording medium comprising: a servo area along an arc corresponding to a locus when a reproduction head moves on the magnetic recording medium in a cross track direction, the servo area comprising magnetic dots aligned at a pitch (L0), wherein the magnetic dots comprise at least m magnetic dot regions in the cross track direction, where m is natural number equal to 2 or more, the magnetic dots formed on a surface of a magnetic recording layer by a method comprising: forming a first stamper comprising a pectin pattern corresponding to at least m magnetic dot regions in a cross track direction, where m is natural number equal to 2 or more; transferring the projecting pattern of the first stamper onto a resist layer on a substrate by: imprinting, forming a guide by curing the resist, causing phase separation by applying a self-organizing material into the guide, forming a self-organizing dot pattern corresponding to dots aligned at a pitch (L 0 ), and forming a second stamper based on the self-organizing dot pattern; preparing a magnetic recording medium comprising a substrate and a magnetic recording layer on the substrate; forming a pattern transfer resist material coating layer on the magnetic recording layer; adhering a pattern surface of the second stamper by using the coating layer; curing the coating layer; removing the second stamper; forming a resist material layer on the magnetic recording layer, the resist material layer being cured after the transferring; and dry-etching using the cured resist material layer as a mask, thereby forming the magnetic dots on a surface of the magnetic recording layer, and wherein a width (Wm) in a down track direction of an m-th magnetic dot region from an innermost circumference of the magnetic recording medium, among the at least m magnetic dot regions, and a number of dot rows (Nm) in the down track direction of the m-th region satisfy the expression (1), and the magnetic dots satisfying the expression (1) are in a preamble portion, L 0{ Nm√ 3/2−0.23}≦ Wm≦L 0{ Nm√ 3/2+0.24} (1) wherein L0 ranges from 17 to 45 nm, and Nm is not more than 6.