Patent ID: 6909634

Claim:
A process of producing a magnetic recording medium having data recorded thereon, comprising the steps of: preparing a magnetic transfer master medium comprising a non-magnetic substrate having a surface with protrusion portions and depression portions corresponding to said data; preparing a slave medium comprising a non-magnetic support having a magnetic recording layer thereon; initially magnetizing said magnetic recording layer of said slave medium in a predetermined direction; bringing said surface of said master medium into intimate contact with said magnetic recording layer of said slave medium at a predetermined pressure to form a conjoined body; and applying a transfer magnetic field to said conjoined body in a direction opposite from said predetermined direction; wherein the substrate of the master carrier has a Young's modulus E (GPa) of 85 to 250, and an expression 2≦αEd 3 /{P(S 2 /S 1 )}≦400 (where the constant α=7.37×10 9 ) is satisfied, where d (m) is a thickness of the substrate of the master carrier from a bottom face of a recessed portion to a back face, S 1 (m 2 ) is a total area of cross sections of projected portions which are parallel to a plane of the substrate at a height of 50% of Dmax from the bottom face of the recessed portion when a height from the bottom face of the recessed portion to a top face of a projected portion is denoted by Dmax, S 2 (m 2 ) is a total area of bottom faces of recessed portions and cross sections of the projected portions at a position of the relevant bottom faces, and P (MPa) is the predetermined pressure.