READING A 0.2μm MARK USING THE MSR METHOD

Abstract

This paper describes the MSR method for high density recording. A series of tests was conducted using magnetic field modulation combined with a laser pulse. A slider embedded with a tiny permanent magnet was developed as an initializing magnetic head. A 680 nm wavelength laser and a 0.55 NA magneto-optical head were used for recording and reading. A MSR disk is made suitable for use combining of NRZi modulation and magnetic field modulation. Using the above, we confirmed the practicality of the MSR disk at a minimum mark length of 0.2μm (0.2μm/bit).