Appeal No. 2007-1530
Application 10/095,112
lower than that of the aluminum alloy but 100 times higher than that of resin.
However, none of the August 23, 2004, Response, Brief, and Reply Brief describe
the aluminum alloy or give any of the following details about the composite(s)
whose test results are represented by the figures: (1) the type of metal used; (2) the
type of hollow ceramics grains used; and (3) the amounts of metal or ceramics
grains on a per volume basis.
THE PYZIK DISCLOSURE
The title of the Pyzik patent is “Computer Disk Substrate, the Process for
Making Same, and the Material Made Therefrom.”
Pyzik explains that conventional hard disks have typically been made of
aluminum substrates that are polished, plated with a nickel-phosphorus coating,
often texturized by one of several means, and then sputtered to place a magnetic
media layer thereon (col. 1, ll. 21-25). Pyzik proposes to make computers smaller-
--or to make them the same size but with more memory---by making the substrates
of the hard disks thinner (col. 1, ll. 28-30). Pyzik also explains making the disk
substrates lighter will reduce battery consumption of hard drives used in portable
computers:
Furthermore, for portable computers, it would be an advantage to have
a more lightweight substrate because the spinning action to which the
disk is subjected requires a great deal of energy. A lighter substrate
would require fewer or smaller batteries. Alternatively, the same
batteries could be utilized, but those batteries would not be discharged
as quickly as they are now.
(Col. 1, ll. 41-47.)
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