I been running a IPC J Std 001D class this week so have not had a lot of
time for emails. I do appreciate all your response and all good advice
and avenues to explore. When you are trying to think ahead for going
into production I try to think what will be the best solution for
manufacturing. The cutting the area away during the manufacturing of
the cover maybe the better way to eliminate adding materials and putting
on materials (Kapton or epoxy). Any other ideas are welcome. Try to
picture a module like assembly with two or more CCAs inside a case that
consists of a top, bottom, front and back covers The front and back
slip over the top and bottom that does put pressure downward. That
downward pressure is causing the covers to come close to the connector
pins. Thanks, Jon
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Brooks, Bill
Sent: Wednesday, November 03, 2010 4:12 PM
To: [log in to unmask]
Subject: Re: [TN] SEEKING A VERY THIN INSULATING MATERIALS
Trimmed thru hole component leads are typically sharp. Poke right thru
most materials under vibration.
Nothing will be better than more distance. Trim the leads shorter,
increase the distance between the cover and the leads... maybe stiffen
the cover... (prevent flexing).
As a last resort... Spray/coat the inside of the cover with hard epoxy
based coating... wet processes are variable and not as repeatable from
part to part... require special handling, masking, etc... not cheap,
uses costly touch labor... less than reliable.
Could you use a non-conductive cover?
Low voltage apps can use 'fish paper'... I never really knew the
material well because we didn't decide to use it in any applications I
ran into... But I know it was used in the automotive and radio
industries for many years. Kapton was preferred in most applications,
still is... it is durable and can be applied easily, die-cut with
adhesive backing... Will not prevent the leads from poking thru it
though for long...
Maybe you can etch the cover with indentations or holes to clear the
leads?
Just a few thoughts based upon what I 'think' you are trying to do...
Best regards,
Bill Brooks | Datron World Communications, Inc.
PCB Designer/Engineer | Office: 760-602-7004| Fax: 760-597-3777 |
[log in to unmask]
3055 Enterprise Court, Vista, CA 92081 | www.dtwc.com
Performance You Require. Value You ExpectTM
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