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Politics : Formerly About Advanced Micro Devices
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To: Paul Engel who wrote (31403)4/8/1998 3:33:00 AM
From: Petz  Read Replies (1) of 1571911
 
Paul, I actually have a factual question for you: What percentage of wafers are discarded before all production steps are completed? Some simple examples like someone dropped it, or the raw die was no good, or tolerance on a mask layer is off so bad that there are zero good CPU's, etc.

Do these kinds of things happen to 1%, 5% or 20% of the wafers? And are these wafers discarded early in the production process or do they go thru the whole process?

Petz
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