Normally when we make changes to the fab drawing that do not effect the gerbers, we add a number after the last revision letter, B1 for example, if the latest revision was Rev. B. But with the change to lead free I also am tempted to change the revision letter so as to be certain that the board in hand is a lead free board.
My regards,
Steve Smith, C.I.D.
Product Engineer
Staco Energy Products Co.
301 Gaddis Boulevard.
Dayton, OH 45403
Web Site: www.stacoenergy.com
& www.stacopower.com
> -----Original Message-----
> From: DesignerCouncil [mailto:[log in to unmask]]On Behalf Of TDK
> Sent: Tuesday, January 10, 2006 7:12 AM
> To: [log in to unmask]
> Subject: Re: [DC] RoHS Compliance for bare PCB
>
>
> It sounds like the best practice is to keep the FAB drawing
> and the gerbers
> at the same rev.
>
> A system I adopted, (I am new here < 1 year) does a 1A, 2A, etc rev to
> documentation, if revs involve documentation only. But the
> above observation
> would indicate that if you rev up the FAB drawing, for
> drawing issues only (
> i.e. you add/delete/modify the NOTES section ) then the
> gerbers would also
> have to rev up to match the FAB drawing rev ( which I am
> against, if not
> warranted----simply too much chance of errors---whenver I generate ANY
> gerbers, I take them thru extensive checks including
> overlaying them with
> previous gerbers to prevent hiccups on existing product)
>
> What say the masses ????
>
> TDK
>
>
>
>
> -----Original Message-----
> From: DesignerCouncil [mailto:[log in to unmask]] On
> Behalf Of Matthew
> Lamkin
> Sent: Tuesday, January 10, 2006 1:53 AM
> To: [log in to unmask]
> Subject: Re: [DC] RoHS Compliance for bare PCB
>
> Are you having some boards that are lead free and some boards that are
> leaded?
>
> Otherwise simply instruct your board fabricator to give lead
> free coatings
> on ALL boards.
>
> That makes non changes to fab drawings etc already done as the overall
> instruction covers all.
>
> We have specified silver plating on all, unless a board made
> overseas in
> which case we get gold.
>
> Matthew.
>
> -----Original Message-----
> From: DesignerCouncil [mailto:[log in to unmask]]On Behalf Of Don
> Larisey
> Sent: Monday, January 09, 2006 4:35 PM
> To: [log in to unmask]
> Subject: [DC] RoHS Compliance for bare PCB
>
>
> What are others doing in the situation of specifying a new finish for
> RoHS compliance on a board that is already in production?
>
> Do you specify the new finish on the PO?
> Do you ECO your documentation and bring the board up to the next rev?
> This would mean generating new Gerber files to include the new rev
> status.
> Do you up rev only the documentation?
> How would you identify the board with the new finish?
> ...................
> ..............
>
> Just trying to get a feel of what others are doing....
>
> Don
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