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Technology Stocks : Ampex Corporation (AEXCA) -- Ignore unavailable to you. Want to Upgrade?

To: SC who wrote (5439)	2/11/1999 2:49:00 PM
From: killybegs	Read Replies (1) \| Respond to of 17679

Re the seagate news, I find it interesting..we need some of the experts to weigh in on this... Anyway, here are some cut and pastes which put together are intriguing... From Seagate' press release..."The data bits were recorded onto Seagate produced magnetic thin-film, low-noise, ultra-smooth cobalt alloy media. The head was at a fly height of 15 nanometers -- 100th the diameter of a fine silk thread....." From the one of the recent Ampex patents on KM....."In an illustrative embodiment, the keeper layer is formed of a relatively thin layer of a soft magnetic material having a relatively high coercivity and low permeability, which saturates at a relatively low bias flux level, but cannot be saturated by flux from the magnetic storage layer alone. In general, the soft magnetic material may be any permeable alloy, and suitable materials include permalloy, sendust and super sendust. The magnetic storage medium is independent of the type of head transducer employed in the magnetic storage system. For example, the present invention may operate with ferrite, thin-film or magnetoresistive heads, including giant MR heads............" From research..... "http://www.ee.umn.edu/users/jchen/publ.html Experimental Study of Recording Performance of Sendust and CoZrNb Keepered Thin Film Media Jinghuan Chen, Jack H. Judy etc., MINT, University of Minnesota Thomas Coughlin, Ampex Corp. IEEE Transactions on Magnetics, Vol 33, No. 5, P3040 ,,,,"" Co is Cobalt ....

To: SC who wrote (5439)	2/11/1999 11:11:00 PM
From: Gus	Read Replies (1) \| Respond to of 17679

SC, I just understand enough of the technology to understand the sell through. The density race favors us because the faster they increase the density, the faster they will approach the superparamagnetic level. At some point, the keepered media program becomes one of several options for dealing with the issue of 'thermal decay.' Cash flow possibilities. I haven't checked the disk drive supply line recently, though, so take that for what it's worth. ...At roughly 20 Gb/sq. in., Seagate predicts drives hit what is called the "superparamagnetic limit"-the bits will be so closely packed that the medium will start losing data. (The superparamagnetic limit is real, though whether we'll hit it at 20 Gb/sq. in., as Seagate predicts, is more controversial. In any event, sooner or later we're going to hit that limit).... techweb.com Thanks for posting that article. Gus