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Technology Stocks : Advanced Micro Devices - Moderated (AMD) -- Ignore unavailable to you. Want to Upgrade?

To: milo_morai who wrote (37564)	4/27/2001 11:37:47 AM
From: fyodor_	Read Replies (1) \| Respond to of 275872

Milo, math101… Pi=22/7 approx Please don't write that ;-). Esp. since you don't use it. Pi100mm100mm= 31415.9265mm^2 for a 200mm Wafer Pi150mm150mm=70685.8347mm^2 for a 300mm Wafer That is 225% more surface area by going to 300mm No. That's 125% more surface area - or, equivalently, 2.25 times the surface area. 130nm is 28% smaller than 180nm. Well, the relevant ratio is: 13² / 18² = .52 Not that you use this either anywhere in your post… We of course are fitting squares on a circle and need to probable adjust those numbers by 10 to 15% due to edges. The relative amount of wafer lost due to this would be much smaller on larger wafers. what is the W.P.W output of Fab 30 today? 2500? Jerry said 60% (of 5k) wafer starts, 50% (of 5k) wafer out. -fyo