PERFLUOROCYCLOBUTANE CONTAINING AROMATIC ETHER POLYMERS AS PLANARIZATION MATERIALS FOR ALTERNATIVE MAGNETIC MEDIA SUBSTRATES

Perfluorocyclobutane aromatic ether polymers (PFCB) are being research ed as planarization materials for alternative magnetic media substrate s allowing smoother surfaces for lower head flying recording. The resu lts of current work reported herein have shown that PFCB can be used t o affect surfaces on canasite with R(A)'s less than 2 nm. In addition, magnetic media can be produced of a quality comparative to that obtai ned on standard NiP-coated Al as well as that produced on regular cana site with equivalent coercivities at about 1500-1600 Oe and squareness es of 0.8 or better. In addition to the above magnetic properties the recording performance was excellent with signal-to-noise ratios of pla narized media 3.5 dB higher than that on regular canasite.