Composite magnetic recording disk.

摘要

A composite structure (11) for magnetic recording includes a core member (11b, 11c, 11d) of polymeric material to which is bonded at least one silicon disk (13) 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. The core member may, as shown, have two silicon disks bonded in annular recesses on opposite sides of the core.