Composite magnetic recording disk
AssigneeInternational Business Machines Corporation
InventorsJack P. Knoop, Joel R. Weiss, James C. Uy
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Abstract
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.
Claims7
A substrate for a magnetic recording disk structure, comprising,
- a rigid silicon disk having a thickness no greater than 0.025 inches,
- an annular shaped core member formed of a polymeric material, said polymeric material having high rigidity and tensile strength and low elongation, bonding means for bonding one surface of said silicon disk to said core member,
- the other surface of said silicon disk being adapted to receive a magnetic recording material to form a magnetic recording member.
Apparatus in accordance with claim 7, in which said walls of said recesses extend above the surfaces of said disks.
Apparatus in accordance with claim 8, including a plurality of such structures clamped together, the extending walls of said recesses forming load bearing surfaces for adjacent structures and providing space between adjacent surfaces for access thereto by magnetic transducing means.
Dependencies are inferred from the claim text.