International Business Machines Corporation

Joel R Weiss

Jack P Knoop

James C Uy

A magnetic recording disk includes a silicon substrate which is extremely flat and essentially asperity-free. A nonmagnetic underlayer is deposited on the silicon to enhance the magnetic performance of the magnetic layer which is deposited on the underlayer. A protective nonmagnetic overlayer is deposited on the magnetic layer.

Magnetic recording disk using silicon substrate

A composite structure for magnetic recording includes a core member of polymeric material to which is bonded at least one silicon disk having a magnetic recording material on its outer surface. The silicon disk surface provides optimal flatness and smoothness characteristics for a magnetic recording substrate, while the polymeric core member provides strength to the structure.

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Morgan Hill, CA, United States of America

Joel R Weiss