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

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


SMD acceptable criteria

Views: 1368

ajay

#38260

SMD acceptable criteria | 7 December, 2005

Hello All, Do any acceptable criteria is followed on DPM for SMD soldering joint / defect. We do face tough time with QA, as they demand 100%. Our SMD board is having about 2000 soldering point & even 99.90% ok (1998 points ok out of 2000) QA do not accept. Thanks Ajay

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#38267

SMD acceptable criteria | 7 December, 2005

Are you saying you can't send out boards that have been touched up or reworked, or are you saying you can't send out boards with defects on them?

100% is a great goal to shoot for but most people don't expect to achieve it. It all depends on what your process capability is and what you can tolerate cost-wise in trying to improve it.

Either way, two defects per board will really slow things down.

What's causing the defects? Printing, placement, reflow, material, ???

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ajay

#38332

SMD acceptable criteria | 9 December, 2005

thanks for info Most of the defect soldering joint do not take place. Observe that PCB not cleaned properly & also component wetting not good. testing staff expect that all card what ever they receiev shuld be 100% ok. they straight forward complain that dry solder issue. thanks ajay

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#38349

SMD acceptable criteria | 9 December, 2005

Hi Ajay, Does your company currently use any quality standards or is it made up as one goes by the QA department? You might find that using IPC 610A Acceptability of Electronic Assemblies very usefull. This manual is our base line for acceptable or rejectable errors. Best Regards, Jay Brower

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