Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

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If we could bake the Board with OSP finish?

Bryan

#29856

If we could bake the Board with OSP finish? | 5 August, 2004

There 's one thing I'm not sure...For the OSP board finish whether we could bake and then store this kind of PCB?or whether once we opened the vacumm package of OSP board and then we can't bake it ? Thanks Bryan

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#29878

If we could bake the Board with OSP finish? | 5 August, 2004

Baking your boards will redue the amount of OSP on the board. If you use the boards quickly, you probably will not have a problem with baking [and don't bake too long].

Why do you want bake this board?

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#29889

If we could bake the Board with OSP finish? | 5 August, 2004

Are you considering baking due to moisture exposure? Not all OSPs are created equal. I would check with your PWB fabricator about dry times and effects on their OSP finish. After you get it, I'd still try just one PWB for bake-dry out and check solderability after. Refer to IPC-9503, Moisture Sensitivity Classification for Non-IC Components for more info

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blnorman

#29922

If we could bake the Board with OSP finish? | 6 August, 2004

OSP has limited elevated temperature exposure capability. Couple that with the fact that solvents (IPA in particular) will remove the OSP. The more material you loose the higher the chances for pad oxidation. We ran an experiment with board washing and determined that one cleaning cycle (alcohol based ultrasonic) removed over 50% of the OSP.

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