Magnetic disk substrate with a core of synthetic material

Details Magnetic disk substrate with a core of synthetic material Magnetic disk substrate with a core of synthetic material

G - Physics

11

B

352/31.3

G11B 5/84 (2006.01) G11B 5/73 (2006.01)

Patent

CA 1187174

MAGNETIC DISK SUBSTRATE WITH A CORE OF SYNTHETIC MATERIAL Abstract A magnetic disk substrate consists of a core of synthetic material which on both sides is covered with metal foils. The preferably used steel foils have a thickness between 10µm and 300µm, and with their material properties determine the surface micro-hardness as well as the peak to valley height. Onto these surfaces the actual magnetic layer is applied. This magnetic disk substrate is made either through molding under the influence of heat, or through foaming of the space between the two metal foils in a suitable mold.

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