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Politics : Formerly About Advanced Micro Devices
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To: Scumbria who wrote (38678)10/8/1998 12:48:00 AM
From: Elmer  Read Replies (1) of 1578124
 
Re: "If yields are less than 1%, and they will ship hundreds of thousands, that implies a total production of multiple tens of millions of parts."

Scumbria, this is another misuse of the term yields. The term binsplit should be used here instead. An example would be that say AMD has 75% of their die on a wafer testing as good parts functionally at wafer sort. This would be a yield of 75%. Of those parts, once they are packaged and tested at final test, 2% are now defective due to assemble problems, 1% operate at 400mhz and 97% run at 350mhz(I'm just making these numbers up). That would be a 98% final test yield, a 97/98 % binsplit to 350mhz and a 1/98% binsplit to 400mhz. Yield refers to the ratio of functional parts to total parts not differentiated by speed.

EP
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