TMS570LC4357: Varnish treatment

Koichiro Tashiro

Hi,

My customer wants to do varnish treatment for moisture exclusion and isolation.
Is there any problems or limitations to cover TMS570LC4357 after the device is soldered on PCB?

Thanks and regards,
Koichiro Tashiro

over 5 years ago

0 QJ Wang over 5 years ago

TI__Guru**** 200246 points

Hello Koichiro,

I haven't heard any limitation for applying conformal coating or other kind of coating onto the silicon.

0 QJ Wang over 5 years ago in reply to QJ Wang

TI__Guru**** 200246 points

Hello Koichiro,

I have forwarded your question to our PE team for more inputs.

0 Allan Webber over 5 years ago

TI__Intellectual 1810 points

We are aware that some of our customers put chemical overcoating on our devices after PCB assembly for such reasons but as as a semiconductor vendor, we do not evaluate those materials. As such we do not have a recommendation either way on using or not using such a material in your system.

One good source for overviewing the pros and cons of different materials can be found under this webinar. https://www.dfrsolutions.com/resources/guarantee_reliability_coating_potting-webinar-lp It also has a pdf that you can download.

0 Allan Webber over 5 years ago in reply to Allan Webber

TI__Intellectual 1810 points

I think I posted the wrong link. This is the one I intended to post. https://www.dfrsolutions.com/hubfs/Resources/services/Coatings-and-Pottings-Issues-Challenges-and-Consortium.pdf

0 QJ Wang over 5 years ago in reply to Allan Webber

TI__Guru**** 200246 points

Hello Koichiro,

Please check Allan's comments.

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TMS570LC4357: Varnish treatment