Electronics Forum | Mon Oct 12 17:28:39 EDT 2020 | rgduval
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 she
Electronics Forum | Sun Oct 01 23:46:24 EDT 2023 | seonr
Hey folks, I have a few designs that I'm using a MEMS I2S microphone on, and the PCBs have to be cleaned as I use water based SAC305 - but the supplier states to NOT ultrasonically clean their microphones. Has anyone here been through the process of
Electronics Forum | Mon Oct 02 21:16:05 EDT 2023 | seonr
Thanks for the suggestion. Unfortunately, there are 2 issues with adding them after: - The first is that doesn't scale to 1000's of board - The second is that half (or more) of the boards are double sided, complete PCB coverage on both sides and nee
Electronics Forum | Fri Oct 06 20:02:07 EDT 2023 | chicagoindustrial
I agree with everyone here that says microphones are meant for no clean processes. Nothing will protect the device from an inline or batch wash. The mic should have been mounted on a different board if it must be washed. The one suggestion I have is
Electronics Forum | Tue Nov 04 15:42:22 EST 2014 | rdubya
break-out the old toaster oven! apply solder paste to board place part and re-flow in toaster oven. those things re good for more than just pot pies and toaster strudel.
Electronics Forum | Tue Nov 04 16:25:10 EST 2014 | davef
Look here: http://www.smtnet.com/company/index.cfm?fuseaction=browse_companies&category=10&country=39
Electronics Forum | Thu Nov 06 21:36:27 EST 2014 | davef
Try them, what do you loose? Pull the "poor college student" routine. Contractors always like to show off.
Electronics Forum | Mon Oct 02 12:43:30 EDT 2023 | daniel_stanphill
I agree with dontfeedphils. Any time we run into a moisture sensitive component that cannot go through our wash cycle, we solder the component(s) by hand after everything that can be washed has been reflowed and cleaned.
Electronics Forum | Tue Oct 03 11:29:56 EDT 2023 | stephendo
Why ultrasonic cleaning? If the ultrasonics are causing problems then nothing will protect the mic. What about peelable mask?
Electronics Forum | Tue Oct 03 18:15:24 EDT 2023 | daniel_stanphill
I had the same thought. We use a peelable mask to protect components during conformal coating. It could potentially give it complete protection with relatively easy removal.
