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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: milo_morai who wrote (92144)	2/8/2000 9:59:00 PM
From: Mani1	Read Replies (1) \| Respond to of 1574616

Milo Re <<Dan what was the date to convert Fab 25 to .18um completely? >> Initially all the wafer start were suppose to be converted by December 31st. According to the last CC, they were a bit behind. I am fairly sure that now it is pretty much fully converted. Re <<And do we get ~28% more chips per wafer on the shrink to .18um?>> No. You almost get 2X if the yields are comparable. (2525)/(1818)=1.92. Of course the are more issues to consider. I almost wanted to know how much space on the wafer is "waisted" by dicing it up. Mani

To: milo_morai who wrote (92144)	2/8/2000 10:53:00 PM
From: Dan3	Read Replies (1) \| Respond to of 1574616

Re: do we get ~28% more chips per wafer on the shrink to .18um? (re: the k6-x lines of course)... I have no real knowledge and can only make a guess from what has gone before, your estimate may be better. IMHO - .18 (K6-2+) will have on chip cache so it should be about the size of the K6-3. If the K6-3 shrinks as much as the Athlon, then there should be 20% to 30% more chips per die (I'd guess). Maybe one of the process experts on the thread can help - when the dice are this small, (dropping, roughly, from 80mm2 to 65mm2) does the gain from reduction of edge loss get overwhelmed by the the loss from inter die spacing? what was the date to convert Fab 25 to .18um completely? I know it was mentioned in one of the conference calls, but don't recall and can't find a link - they may want to keep some of that equipment running for a while. The last .25 Athlon start was months ago. The K6-2+ is supposed to be in volume this quarter - so it must already be in production (at .18). Regards, Dan