Metal-clad ceramic-metal matrix composites for magnetic disk substrates for hard disk drives
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United States of America Patent
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Apr 20, 1999
Issued Date -
N/A
app pub date -
Jan 30, 1997
filing date -
Jul 1, 1996
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Expired
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Abstract
A rigid disk substrate for a magnetic recording disk is formed of a metal-clad ceramic-metal matrix composite sandwich structure. The ceramic-metal matrix composite has a composition ranging from approximately 1 to 40 weight % of ceramic and 60 to 99 weight % of metal matrix. The metal matrix material and the metal cladding material are aluminum or an aluminum alloy. The substrate has a thickness less than 1 mm.
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