Formerly About Advanced Micro Devices Message Board

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Politics : Formerly About Advanced Micro Devices

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To: THE WATSONYOUTH who wrote (82671)	12/11/1999 3:44:00 PM
From: Ali Chen	Read Replies (2) of 1573967

WATSONYOUTH, <Intel ..will not sacrifice yields for riskier processing> Do you think they have a choice? Your speculations do not bode well with several facts. First, the 0.18 parts appeared initially as "mobile parts", and only up to 400 MHz. This is fairly unusual, to have mobile parts before validation on desktop market. Second, there were rumors in the mid-year that Cumines cannot get to 600 MHz in the working temperature range. The 600-MHz target was plugged by overclocked 0.22 Pentiums-II (final stage of Intel "0.25" process after dual 5% linear shrink). Therefore one can conclude that a) those parts were on regular "un-notched" Al process, and it just can't cut the mustard, and b} the original target was not much higher than 600, say, 650. Therefore I tend to believe that the current Floppermines are already on the tweaked "notched" process, and availability of 733 parts is an indication of yields. Once you are behind the peak market frequency, you have to resort to process tweaks and local mask optimizations, which do not improve yield as you might know from the K6 history. I think we will see more Copperminegates in the future, at every speed barrier. - Ali

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