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August 2002

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Thu, 29 Aug 2002 13:53:10 -0400
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I agree that OSP has a lot of virtues and it has improved greatly in the last 10 years.  Particularly in terms of storage, thermal cycles, less dependence upon reflow in an inert atmosphere.
However, in any application, the post-assembly environment has to be taken into consideration.  In Barbīs application, OSP was considered but the product has to survive in potentially humid environments and thus the long term impact on reliability has to be taken into consideration.
There is still no panacea surface finish for the industry - at least not yet.  Everything is application specific.

Phil Zarrow
ITM Consulting
Durham, NH  USA
www.ITMconsulting.org

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