Subject: | |
From: | |
Reply To: | |
Date: | Fri, 07 Mar 1997 09:05:55 -0800 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
Sheila Smith wrote:
>
> Technetters:
>
> I am soliciting opinions on conformal coating of PBW-mounted connectors.
> Our manufacturing folks refuse to conformal coat within 1/8" of any board
> mount connectors. They contend the conformal coating will wick up the pins
> and get on the contact areas, regardless of the type of conformal coating
> used or the method of application. The connectors are not sealed. These
> boards have to pass salt fog & humidity testing and I don't like the idea of
> having bare areas, especially at the interface where the connector meets the
> board. Does anyone have any experience with this? Thanks in advance for
> your help!
>
> S. Smith, Tracor Aerospace Electronics Systems
>
> ***************************************************************************
> * TechNet mail list is provided as a service by IPC using SmartList v3.05 *
> ***************************************************************************
> * To subscribe/unsubscribe send a message <to: [log in to unmask]> *
> * with <subject: subscribe/unsubscribe> and no text in the body. *
> ***************************************************************************
> * If you are having a problem with the IPC TechNet forum please contact *
> * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] *
> ***************************************************************************
Sheila, there are ways to protect the connectors while the boards are
being coated with a conformalcoating. You can tape them individually or
design a cover fixture if they are adjacent to each other.
It all depends upon how the boards are being coated? by spray, dipping
or a vapor deposition method like used for "Parylene" conformal coating.
***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To subscribe/unsubscribe send a message <to: [log in to unmask]> *
* with <subject: subscribe/unsubscribe> and no text in the body. *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] *
***************************************************************************
|
|
|