From: Michael S. Lorrey (mike@lorrey.com)
Date: Sat Apr 17 1999 - 22:38:24 MDT
James Rogers wrote:
>
> Normal production CDs have an aluminum recording surface. The aluminum
> slowly oxidizes, either by exposure to atmospheric oxygen (it leaks in
> along the exposed edges), or from very slow oxidation reactions with the
> surrounding media.
Actually, I may have a good low cost solution. The reason the aluminum
degrades is because it is so thin. Ruger has perfected a method of
investment casting an aluminum/aluminum oxide matrix material which is
harder than titanium and is as resistant to oxidation as gemstone
(aluminum oxide is ruby or sapphire?). They are using this material for
their soon to be released line of golf club driver heads.
Cast disks or cards or this material and burn it with either a laser or
electron beam for a long lasting media.
Mike Lorrey
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