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To: Sarmad Y. Hermiz who wrote (219913)12/10/2006 6:07:32 PM
From: pgerassiRead Replies (2) | Respond to of 275872
 
Dear Sarmad:

implied in the expectation that conversion from 200mm 90 nm to 300mm 65 nm process brings 40% per piece cost savings, is the assumption that %-age yield is the same as 90 nm yield for un-shrunk part

This is an incorrect statement. What is being discussed is between 90nm and 65nm both on 300mm wafers. Fab 30 doesn't do 65nm and will continue to make 90nm parts on 200mm until its conversion to Fab 38 at 65/45nm(/32nm?) on 300mm. Also since 90nm was made on 65nm equipment at Fab 36, 65nm production is quicker because measurements made on 90nm are directly applicable to 65nm. So any wafers processed at Fab 36 yield information about how good a yield 65nm would get whether they were 65nm or 90nm.

The same will be true at Fab 38 as any 65nm process wafers will yield information about how good would it be with a 45nm process being done on the exact same equipment. It won't occur however for Fab 40 (NY) at 32nm being different equipment.

Pete