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To: Tony Viola who wrote (18177)4/2/1999 7:57:00 PM
From: Zeev Hed  Respond to of 93625
 
Tony, you should also mention that the yield on typical DRAM devices is pretty close to 80%, and thus a device that has a yield of only 40% will cost at least twice as much to make.

On the other hand, since most of the RDRAM are being made with sub .21 design rules (where the bulk of current 64 and greater traditional DRAM are made), you should get more dies per wafer. There is of a course a third hand, which dictates operation at faster rates involving higher heat dissipation per switching (and more switching per unit time) with the RGAS variety. I am sure that our experts will point to few other hands by the time this discussion is finished.

Typically, a "technology" becomes "mature" within a year of the first test wafers, so initial low yields and high costs are not necessarily a death knell.

Zeev