Subject: | |
From: | |
Reply To: | |
Date: | Mon, 26 Mar 2012 10:28:15 -0400 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
naw, i'm new -- this is only year 14 for me....
From:
Jack Olson <[log in to unmask]>
To:
<[log in to unmask]>
Date:
26/03/2012 10:13 AM
Subject:
Re: [TN] ASSY: Short leads in a PWA
Sent by:
TechNet <[log in to unmask]>
16 YEARS at TechNet?
I still feel like "the new guy"!!!
onward thru the fog,
Jack
On Wed, 27 Mar 1996 07:16:59 -0800, Jack Olson <[log in to unmask]> wrote:
>[log in to unmask] wrote:
>> Due to a "non-existent" clearance between a PWA and a shielded
case,
>> we would like to have certain components with lead lengths that
are
>> not long enough to protrude through to the secondary side of the
>> board. Thus, there would be no fillet for a solder joint.
>
>We had a similar situation, but in our case we specified that the leads
be
>clipped (after soldering), and the fillet ground down to .030 mils. These
>boards were for airplanes and had to undergo shock, vibration,
environmental
>testing etc. NO PROBLEMS. Of course, you said your clearance was
>"non-existent", can you spare 30 mils? And by "shielded case" do you mean
>conductive? You might have to apply some adhesive KAPTON over the pads
after
>you grind them, but at least by grinding you have the most lead length,
and
>strongest solderjoint possible, still much stronger than a SMT
connection,
>right?
> Jack
>p.s. I would like to hear what others recommend, though... anybody else?
>
>
______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
|
|
|