CRUCIAL POINTS IN PERPENDICULAR RECORDING

It is shown that for vertical recording it is necessary not only to add the knowledge of the crystallographic structure of the media, the mastering of the conditions for the nucleation and the growth of the thin films used etc, to the experience gained from the longitudinal recording method, but also to reconsider the design of the R/W sensors, the reproducing characteristics, the signal processing and the traditional margins with respect to the application.