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Fiber Reinforced Magnetic Disk Glass Substrate Disclosure Number: IPCOM000051114D
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2005-Feb-10

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Hinkel, H Kuenzel, U Schmid, G [+details]


For the production of a glass plate, in particular, for use as a magnetic disk substrate, the risk of breakage is reduced by generating a compressive stress in the glass surface, using fibers having a greater thermal expansion coefficient than the glass matrix. In addition, it is advantageous for the fibers to have a greater Young*s modulus and a higher tensile strength than the glass matrix. A substrate thus produced is highly plane, has a small peak to valley microroughness, and is largely free from surface defects. There is no galvanocorrosion. It is sufficient to arrange the fibers close to the substrate surface.