Patent ID: 8551348
Filing Date: 2013-10-08
Classification: G11B

Abstract:
1. A method of manufacturing a magnetic recording medium, comprising: forming a first mask material made of a carbon film and a second mask material made of a resist film on a ferromagnetic layer; printing a stamper on the second mask material made of the resist film in order to transfer patterns of protrusions and recesses from the stamper; etching the first mask material made of the carbon film using the second mask material made of the resist film as a mask to which the patterns of protrusions and recesses are transferred in order to transfer patterns of protrusions and recesses; stripping the second mask material made of the resist film followed by etching a portion of the ferromagnetic layer in the recesses of the patterns of protrusions and recesses, or etching a portion of the ferromagnetic layer in the recesses of the patterns of protrusions and recesses followed by stripping the second mask material made of the resist film; and modifying the ferromagnetic layer in the recesses by reacting with either oxygen or oxygen mixed gas in order to form a non-magnetic layer comprising a component of the ferromagnetic layer together with magnetic patterns comprising the ferromagnetic layer separated by the non-magnetic layer and simultaneously stripping the first mask material made of the carbon film.