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Politics : Formerly About Advanced Micro Devices

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To: Yousef who wrote (25067)	10/22/1997 12:53:00 PM
From: Petz	Read Replies (1) of 1576717

Yousef, re:bringing up 0.25 process at AMD. You said As posted on the other AMD thread, Fab25 has 86,700 sqft of cleanroom space. In that space, one should be able to get at least 30 (8") steppers and "other supporting" Fab equipment. The majority of these steppers will be I-line machines capable of either.35um or .25um production. Probably about 5 of these will be DUV steppers/scanners that are needed for the "critical layers" in a .25um process. Thus for both .35um and .25um, there will be redundant equipment to help keep cycletime (outdate-indate of wafers) down and capacity up. I expect that AMD will be able to build all the CPU's you mentioned in this Fab. But then you said, They have to bring up the .25um process on equipment running .35um production. If there are "30 steppers and supporting equipment" why do any of them have to be used for both the 0.35 and 0.25 um process? In fact, since AMD is continuously buying new equipment for this fab, I suspect that most of the 0.25 um equipment was never used for 0.35 production. Please explain. Petz

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