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August 1999

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Subject:
Re: jumper wire routings
From:
Ellen Berkman <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 24 Aug 1999 08:02:56 -0700
Content-Type:
text/plain
Parts/Attachments:
text/plain (54 lines) 
> >
> > Hi Technetters:
> >
> > Our Production Manager has issued a work
> > instruction for signature approvals.  The solder side pictorial shows an
> > insulated jumper wire being routed between leads of several ICs.  I asked
> > why he routed this way.  The answer was that it is the shortest path.  I
> > chose a different path that is a bit longer yet does not cross through
> > any pins. The operator would need to dab glue on an extra corner.  We
> > looked through IPC 610C for rules.  The acceptable pictures show jumpers
> > going through pins.  The jumpers in 610 do not follow x-y routings like I
> > was taught.
> >
> >                                                                 |
> >            o     o  o     o  o      o  o     o   |
> >            o     o  o     o  o      o  o     o   |
> >            o     o  o     o  o      o  o     o   |
> >            o     o  o     o  o      o  o     o   |
> >            o     o  o     o  o      o  o     o   |
> >            o     o  o     o  o      o  o     o   | jumper
> >            o ____o__o_____o__o______o__o_____o___|
> >            o     o  o     o  o      o  o     o
> >            o     o  o     o  o      o  o     o
> >            o     o  o     o  o      o  o     o
> >            o     o  o     o  o      o  o     o
> >            o     o  o     o  o      o  o     o
> >            o     o  o     o  o      o  o     o
> >            o     o  o     o  o      o  o     o
> >
> >   Please advise and explain why we can or can't route as the production
> >   manager wants.
> >
> >
> >
> >
> >   Thanks
> >
> >   Ellen Berkman
> >   QA Manager, Excalibur Systems

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