TECHNET Archives

February 2009

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Graham Collins <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Mon, 2 Feb 2009 10:02:52 -0400
Content-Type:
text/plain
Parts/Attachments:
text/plain (103 lines)
Hi Steve
Not a dumb question.  The short answer?  Would it work?  Absolutely.
Would it be legal per IPC-A-610 class 3?  No way.  So we could put it on
the drawing, except it's a build to print project - we aren't the design
authority.  The mountain of difficulty involved in getting that
approved...  And product qualification?  Can't claim qualification by
similarity on that.

So the short answer is that putting an intentional solder bridge there
is not an available option at this time.  I'm stuck with the world's
shortest jumper wire.

regards,
 - Graham

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Monday, February 02, 2009 9:05 AM
To: [log in to unmask]
Subject: Re: [TN] Jumper wire forming for fine pitch QFP?

Morning Graham,

Can I ask a dumb question? Why not just solderbridge the leads together?

Steve 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Graham Collins
Sent: Monday, February 02, 2009 6:59 AM
To: [log in to unmask]
Subject: [TN] Jumper wire forming for fine pitch QFP?

Hello Technet
I've got a design where we have to run a jumper between two adjacent
legs of a fine pitch part.  So the jumper is a tiny piece of wire that
runs down the leg, across the foot, bends around in a U, and back up the
adjacent lead.  We hand form this, and the operators are not liking it.
I'm pondering getting the machine shop to try to make something we could
use to pre-form the wire for this, but it's a bit higher precision than
they usually work to.  The gap between component leads is about .012"

Does anything already exist in the tooling world to pre-form a wire in
this manner?  I don't want to re-invent the wheel if I can avoid it.


thanks,
 
Graham Collins
L-3 communications ES
Halifax Production Engineering



 



NOTICE OF CONFIDENTIALITY: This message and any attachments are solely
for the use of the individual or entity to which it is addressed and may
contain information that is privileged or confidential or controlled
technical data that is subject to the laws of Canada or the United
States.  If you are not the intended recipient, any disclosure, use or
distribution of the information contained herein is prohibited.  If you
have received this communication in error, please notify the sender by
reply e-mail and immediately delete this message and any attachments.

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0 To
unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or
(re-start) delivery of Technet send e-mail to [log in to unmask]: SET
Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the
posts: send e-mail to [log in to unmask]: SET Technet Digest Search the
archives of previous posts at: http://listserv.ipc.org/archives Please
visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for
additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0 To
unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or
(re-start) delivery of Technet send e-mail to [log in to unmask]: SET
Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the
posts: send e-mail to [log in to unmask]: SET Technet Digest Search the
archives of previous posts at: http://listserv.ipc.org/archives Please
visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for
additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------

ATOM RSS1 RSS2