Patent ID: 7807338

Claim:
A method of manufacturing a magnetic disk, comprising the steps of: disposing a plurality of magnetic recording tracks concentrically, each of the magnetic recording track including a plurality of sectors, the sector including a data information recording area and a control information recording area; and forming a separation groove between data areas each included in the data information recording area included in each of the plurality of magnetic recording tracks, and in which data is written; wherein, the step of forming a separation groove includes the steps of forming a resist layer having an opening corresponding to a pattern of the separation groove by photolithography, wherein the pattern of the separation groove is formed corresponding to each of a plurality of magnetic disks disposed on a substrate, and etching to form the separation groove with a predetermined depth on a surface of one of the substrate and a material formed on the substrate through the opening of the resist layer, in the step of forming the separation groove, the step of forming the resist layer and the step of etching are performed for both of a front surface and a back surface of the substrate.