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- Path: sparky!uunet!pipex!unipalm!uknet!gdt!bsmail!smee
- From: smee@bristol.ac.uk (Paul Smee)
- Newsgroups: rec.audio
- Subject: Re: Mobile Fidelity....
- Message-ID: <1992Dec16.094829.16337@bristol.ac.uk>
- Date: 16 Dec 92 09:48:29 GMT
- References: <1992Dec12.210233.16182@nntpd2.cxo.dec.com>
- Reply-To: P.Smee@bristol.ac.uk (Paul Smee)
- Organization: University of Bristol
- Lines: 18
-
- In article <1992Dec12.210233.16182@nntpd2.cxo.dec.com> winalski@adserv.enet.dec.com (Paul S. Winalski) writes:
- >The claim is that, since gold is a more malleable material than aluminum,
- >the gold foil will adhere more closely and more smoothly to the pits in the
- >CD, thus providing a better surface to be read by the laser, and reducing the
- >number of read errors. As far as I know, nobody has ever conducted experiments
- >to test this hypothesis. I noticed that MFSL has stopped making this claim
- >in their packaging of Ultradiscs.
-
- Sounds like marketing hype to me. I could believe that explanation if
- CDs were made by gluing thin metal foil to the plastic substrate, but
- that's not how I understand it to work. My impression is that the
- metal coating is deposited (an atom at a time) by sputtering or vapor
- deposit in vacuum, and in that context malleability shouldn't enter
- into it.
-
- --
- Paul Smee, Computing Service, University of Bristol, Bristol BS8 1UD, UK
- P.Smee@bristol.ac.uk - ..!uunet!uknet!bsmail!p.smee - Tel +44 272 303132
-