HIGH COERCIVITY AND LOW-NOISE MEDIA USING GLASS SUBSTRATE

To improve the recording performance of magnetic media on a glass subs trate, we have investigated the effect of coating a glass substrate wi th additional thin reactive films before sputtering conventional Cr an d Co alloy films. NiP3, TiSi2, Cr, or C were used for reactive layers. With a proper reactive layer, the optimized glass substrate media had a coercivity equivalent to textured Al substrate media and noise lowe r than Al textured media. Macromagnetic performance and I ead-write pe rformance were evaluated. The correlation of magnetic performance with film microstructure was determined using XRD. TEM and AFM characteriz ation techniques.