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Week 23 Analysis
Physical Inspection acceptance climbed further in Week 23 to 84% from Week 22's 74%. Eletrical testing yields, however, dropped to 54% on relatively low volumes.
I do not think that it is a coincidence that a majority of the devices that fail electrical testing require advanced testing capabilities, such as high voltage and current devices, and parametric rather than functional testing on less complex devices for which there are similar, but not identical devices available from Tier 2 manufacturers.
The other trend is for more complex digital-based devices to have failures consistent with long-term storage or even previous use, such as open and short pins, damaged protection diodes, and existing programming.
Mark A. Rinehart
Managing Director
White Horse Laboratories |