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January 1999

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Wed, 6 Jan 1999 09:01:46 -0600
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Ryan,

Always a pleasure to see from you. Glad for your VOC success. We all need what you have.

I'm glad you increased your wave temperature. Did you increase your preheat to compensate? So many
people are concerned about ceramic chip device cracking (as they should be while being equally
concerned about thermally shocking PCB's), they crank down the wave temp hoping to avoid the problem
without enough concern for solder joint quality and reliability.

It certainly is a balancing act but, as you say, it only is getting better through chemistry. You do
realize DuPont used to have a slogan stating "BETTER THINGS FOR BETTER LIVING THROUGH CHEMISTRY."
This, of course, was pre-serious drug era verbage.

When are you going inert?

Serious regards,

Earl Moon

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