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Date: | Fri, 1 Dec 2017 17:21:02 +0000 |
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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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