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To: Paul Engel who wrote (131582)4/4/2001 12:11:00 AM
From: semiconeng  Respond to of 186894
 
Jim - Re: "What would the relative cost be between an 8" and 12" wafer?"
A rough guess - 1.75x - 2.25x

Paul


I think the biggest cost is going to be in the equipment. I recall when the industry went from 6" to 8", I noticed that many of the Fab tools in use could do "either" 6" or 8", so the cost of that transition was in a large part, mainly adjusting the process, recipe, power levels, gas flows etc. I haven't noticed that same multi-use trend in the transition to 12"

Maybe the 4" increase vs. the previous 2" increase made it technologically difficult for the tool makers to incorporate a "Dual" wafer size tool, but I'm not seeing them with the same frequency that I did during the 6"-8" transition.

Maybe that's one of the reasons why intel is sticking with the 7.5 Capital Investment??

Semi

P.S. - I think I might have fixed the Private Mail issue.