Magnetic recording medium manufacturing method and magnetic recording/reproduction device

Abstract

Provided is a method for manufacturing a magnetic recording medium having a magnetic recording pattern magnetically separated. The method includes the following three steps performed in this order: [1] a step for forming a magnetic layer on a non-magnetic substrate; [2] a step for removing a magnetic layer surface portion of a region for magnetically separating the magnetic layer; [3] a step for exposing to reactive plasma or reactive ions, the surface of the magnetic layer region exposed by removing the magnetic layer surface layer portion so as to reduce the coercive force and the residual magnetization of the magnetic layer region, so that the magnetic layer region having the reformed magnetic characteristic forms a magnetic recording pattern magnetically separated. By using this method, it is possible to manufacture a magnetic recording medium having no write blur upon magnetic recording, at a high productivity.

Description

technical field The present invention relates to a method of manufacturing a magnetic recording medium used in a magnetic recording and reproducing device such as a hard disk device, and to a magnetic recording and reproducing device. Background technique In recent years, the scope of application of magnetic recording devices such as magnetic disk devices, flexible disk devices, and magnetic tape devices has significantly increased, and while their importance has increased, the recording density of magnetic recording media used in these devices has been continuously sought. Significantly increased. Especially since the introduction of MR head and PRML technology, the increase in areal recording density has become more intense. In recent years, GMR head, TMR head, etc. have been introduced, and they continue to increase at a rate of about 100% every year. For these magnetic recording media, higher recording densities will be required in the future, and for this purpose, high...

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Problems solved by technology

However, in this method, the magnetic layer suffers damage due to ion implantation or laser irradiation, and unevenness is sometimes formed on the surface of the magnetic layer

In addition, in this method, although the energy of implanted ions or laser is high, the energy density of the entire surface of the medium is low, and the processing time until the magnetic change of the entire surface of the medium is long.

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