Application of magnetic printing method to hard-disk media with double recording layers

Abstract

The magnetic printing method, which can duplicate soft magnetic patterns containing digital information such as servosignals formed on a master disk onto recording media, enables signals to be written to hard-disk media having high coercivities above 6000 Oe. We propose the application of the magnetic printing method to a hard-disk medium having double recording layers, one layer of which has high coercivity and is to be printed with digital information. This double recording layer medium is a hard-disk medium that has a magnetic read-only-memory (MROM) layer. In this study, we demonstrated a method for printing to this medium, which has MROM, and discussed the magnetic properties and recording performances of this medium.

Nanofabricated and self-assembled magnetic structures as data storage media

“…The printing technique has also been extended to perpendicular recording media having H c as high as 10 kOe using a soft Co film magnetic mask [192]. Experiments on double layer slave disks have also been reported, where one layer has high coercivity and contains the printed information and the second, softer, layer acts as the recordable medium [193].…”

Copper nanomaterials and assemblies for soft electronics

“…The inks, consisting of well-dispersed nanomaterials in homogeneous solvents, are ejected by a piezoelectric device as tiny microscale droplets (Fig. 7a), which are directly deposited on the designated places on the substrate [114][115][116][117][118][119][120][121][122][123][124]. In a typical example, a suitable ink was obtained by dispersing the CuNPs in a mixture of 2amino-2-methyl-1-propanol and distilled water at pH 9 with a wetting agent at a concentration of 0.1 wt%.…”