since it is RF module, he might not have choice to conformal coat,
unless he got OK from the designer...
jk
On Dec 1, 2017, at 12:21 PM, Ed Popielarski wrote:
> Have you considered conformal coat the module, then hand solder
> with OA & wash?
>
>
> Regards,
>
> Ed Popielarski
> Engineering Manager
>
>
> 970 NE 21st Ct.
> Oak Harbor, Wa. 98277
>
> Ph: 360-675-1322
> Fx: 206-624-0695
> Cl: 360-544-2289
>
>
> "Nearly all men can stand adversity, but if you want to test a
> man's character, give him power." Abraham Lincoln
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Graham Collins
> Sent: Friday, December 01, 2017 9:09 AM
> To: [log in to unmask]
> Subject: [TN] board wash / non-washable modules - the dilemma
>
> Hello Technet!
>
> Wondering what other people are doing with this dilemma.
>
> We have had several customers design in pre-built RF modules on
> their boards. I totally get why, it is a pre-built, FCC approved,
> easy solution - the fastest way to get a good Wi-Fi or bluetooth
> solution.
>
> Where things go off the rails for me are where this is used in a
> high humidity application (e.g. a marine setting). We strongly
> prefer to wash boards, we can build no-clean if needed but I'd
> prefer not to for an on the water use. But the part a customer has
> designed in specifically says not to wash it (it has an EMI shield,
> so they are properly concerned with water entrapment).
>
> So - would you:
>
> - build it no-clean?
> - leave the part off, build and wash as usual, install RF module
> later using no-clean?
> - wash it (and maybe bake it to dry it out)?
> - ????
>
> --
> regards,
>
> Graham Collins
> Senior Process Engineer
> Sunsel Systems
> (902) 444-7867
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