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microphoe low sensitivity

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SMTA-64386317

#85772

microphoe low sensitivity | 12 October, 2020

Hi, I am facing high fall out of microphone low sensitivity issues. This microphone is soldering thru SMT soldering with low peak temperature profile which peak at 232 DegC to 240 DegC and have skipped X-Ray inspection but still seeing fall out especially at customer side. Anybody have experience this type of defect?

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#85780

microphoe low sensitivity | 12 October, 2020

Check the microphone data sheet to find out what the max temperature is...if it's not listed, call the manufacturer.

Are you water-washing the board after assembly? Could be water intrusion/entrapment in the microphone. Again, check the data shee/call the manufacturer to find out if the part is water-wash safe. It's likely not sealed, even if there's a piece of tape over the obvious openings.

Cheers, ..rob

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#85782

microphoe low sensitivity | 13 October, 2020

In the spirit of never assuming anything. Is there a cover that you are not removing?

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SMTA-64386317

#85787

microphoe low sensitivity | 14 October, 2020

Data sheet allows of 250 DegC peak temperature and we are using below 240 DegC but still seeing high fal out. Manufacturer diagnose as BE charges loss due to heat. Hence, looking for anything extra could be done to minimize this defect. There is no washing process for this part.

This message was posted via the Electronics Forum @ SMTASMTA

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#85788

microphoe low sensitivity | 14 October, 2020

can you add the datasheet?

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