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- From: hinz@picard.med.ge.com (David Hinz Mfg 4-6987 ~BHOSVWZ#097)
- Subject: Re: Why Don't CDs use Both Sides?
- Message-ID: <1993Jan5.095214.6893@mr.med.ge.com>
- Sender: news@mr.med.ge.com
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- Organization: GE Medical Systems, Magnetic Resonance
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- References: <C0CKuK.Cx8@fc.hp.com>
- Distribution: usa
- Date: Tue, 5 Jan 93 09:52:14 GMT
- Lines: 26
-
- : Mike Ross (mike@drseus.jsc.nasa.gov) wrote:
- :
- : > I couldn't find the answer to this in the FAQ. I see no reason why
- : > the data capacity couldn't be doubled just by using the other side.
- : > Obviously, I am severely wrong, or someone would do just that.
- : > Is this true? And if they can't use both sides, why not?
-
- Also, I would think that the manufacturing process would be difficult.
- As I understand it (weasel phrase), CD's are made by imprinting the texture
- on the polycarbonate side, then depositing the aluminum in a VERY thin layer.
-
- If you wanted a 2-sided CD, you'd have to make two of these, and sandwich them
- together somehow, which would get somewhat hairy.
-
- What about using something with a (higher?) index of refraction? That way,
- if the manufacturing difficulties could be overcome, the disk need not be
- any thicker than present one-sided disks, and would be compatible with
- current drives, but could be used with (future?) double sided drives.
-
- Dave
-
- --
-
- Dave Hinz - Opinions expressed are mine, not my employer's. Obviously.
- Ask me if I have an opinion on this! \ Don't blame me; I voted for Perot!
- SAAB - Because you get what you pay for. \ Pherrets are Phun!!!
-