Abstract
In a DCC system, since various kinds of analog tape are used along with DCC digital tapes, problems of head wear or the yoke recess occur. One solution to these problems is to use of an ultrathin (500A) protective overcoat on the head surface. We studied CrN films prepared by DC-biased reactive magnetron sputtering at room temperature. The internal stress and Knoop hardness of a CrN film sputtered in Ar+N2 gas were increased by applying a DC-bias voltage between the anode and cathode. In addition to very hard of CrN films, moderate surface roughness (Rmax∼260A) was essential. We obtained 1200 hour wear-resistance for abrasive CrO2 tapes by using a 500A-thick CrN film prepared in optimum conditions.
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