Advanced Micro Devices - Moderated (AMD) Message Board

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Technology Stocks : Advanced Micro Devices - Moderated (AMD)

AMD 221.45

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3:59 PM EST

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To: survivin who wrote (68009)	1/17/2002 12:22:02 PM
From: semiconeng	Read Replies (1) of 275872

Yields in the high 90s? Sanders said AMD's investments have also allowed the firm to run its fabs "with yields in the high 90s" percentage range. --What he actually said was "Line Yield". Line Yield, and Die Yield are not the same thing. --Line Yield = How many wafers get to the end of the line, vs. how many you start. Scrapped wafers for damage, or handling, or breakage are the usual root cause. --Die Yield = How many good die per wafer you get. --Line Yield at >90% for world class fabs is nothing special. You better not be breking more than a few percent of your wafers in-line, but it says nothing about die yields, or how good the Process is. all it means is that AMD drops about 10% of it's wafers, nothing more, nothing less. Semi

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