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To: dougSF30 who wrote (237541)7/28/2007 2:31:01 PM
From: Sarmad Y. HermizRead Replies (1) | Respond to of 275872
 
>> 12M / 30M = 40% yields on a ~125mm^2 die.

Barcelona yields (283mm^2) must be bad indeed.
<<

This model is a sanity check on the defect density model. And they both come to the same result. Around 30% yield for barc.



To: dougSF30 who wrote (237541)7/28/2007 3:29:22 PM
From: Dan3Read Replies (2) | Respond to of 275872
 
Re: Fab36 processed ~4.2B mm^2 of wafer area, running at 60000 wafers/Q

That seems unlikely. They were going to ramp to 45000 "within an unspecified time" as demand dictated. Unless you're claiming demand has been way above expectations....

I'd be surprised if it much more than 30000 per quarter.

AMD's head honcho, Hector Ruiz, had played down the ramp rate and first phase capacity expansion for Fab 36 in May 2004, during the fabs "topping off" ceremony. The fab would, according to Hector, have an initial 15,000wspm capability and would be ramped to that level within an unspecified time. Any further ramp would be dictated by demand.
fabtech.org

By the way, their loan covenants require a minimum 75% yield at their Dresden FABs:
(b) a certificate issued by the Technical Adviser confirming
that the Borrower has achieved a minimum of 325 wafer starts
per week on average over a period of four (4) consecutive
weeks (the "Average WSPW"), and a seventy-five (75) per
cent. average process yield over the same period of four (4)
consecutive weeks (the "Average Yield");

sec.edgar-online.com

Sorry to rain on the wbmw, sarmand, doug "bad yields" parade.

:-)



To: dougSF30 who wrote (237541)7/30/2007 1:56:47 PM
From: Joe NYCRead Replies (1) | Respond to of 275872
 
Doug,

Fab36 processed ~4.2B mm^2 of wafer area, running at 60000 wafers/Q.

There is a difference between "being able to ramp to" certain wafer processing rate and "processed".

Joe