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March 1997

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FAB: BGA and uBGA phototool reqrmnts
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Please help me identify the phototool requirements for imaging BGA designs 
for production.
What are the current issues in artwork production?
Are glass masters desired?
What sort of production volumes are typical?
How critical is dimensional stability of the phototool?
Who are the experts in the fabrication of BGA and uBGA?

Anything else will help.

Thanks,
George Murray

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