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

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Vapor phase soldering SIR test

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#58163

Vapor phase soldering SIR test | 23 February, 2009

Are boards produced using Vapor phase ovens dirtier than N2 Reflow oven. Are there any studies/papers someone can point to? if not what are the methods to verify this? is IPC specified SIR test using 24B SIR test coupons? please advise. thanks in advance for the inputs

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#58164

Vapor phase soldering SIR test | 23 February, 2009

Chet, We've found the exact opposite. Boards we process in VP are cleaner than convection. Sorry but I cannot provide any meaningful data to back that up though. We conduct SIR testing internally using our high impedance pcba's.

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#58165

Vapor phase soldering SIR test | 23 February, 2009

Hi Larry, thanks for quick response. Do you have such observation for No clean paste process also? regards chet

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#58186

Vapor phase soldering SIR test | 24 February, 2009

Yes, we are only running no-clean pastes.

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