One other point...
RoHS Compliant does not equal lead-free which does not equal a Surface
Finish change.
If the product needs to be RoHS compliant then I would not ask my
supplier for a Lead-Free product, I would ask for a Certificate of RoHS
Compliance. Further, I would ensure that other items on the Fabrication
Notes are OK, most of our RoHS Compliant Products require higher Td
laminates, such as IS410 rather than typical FR406. This is not
something which will be an issue at fabrication or even within the
initial assembly process. However, if your product ever requires rework
or multiple lead-free temperature excursions then the higher temp
laminates should be considered.
RoHS banned substances can be found in laminates, surface finishes and
legend inks, simply changing the surface finish may not solve the issue.
Hope this helps,
Joe
Joseph F. O'Neil Hunter Technology
President 2941 Corvin Drive
(408) 245-5400 Santa Clara, California 95051
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-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of
Cheryl Johnson
Sent: Tuesday, January 10, 2006 12:52 PM
To: [log in to unmask]
Subject: Re: [DC] RoHS Compliance for bare PCB
I agree with Steve, and highly recommend reving the board. The two
boards
are NOT equivalent. They require different processes, temperature
profiles.
They are NOT the same. If the board is not marked somehow differently,
how
can you verify that you are only shipping the RoHS compliant versions to
EU?
Sincerely,
-----------------------------------
Cheryl Johnson, C.I.D.+
Manager
ExcelStor US Office, Engineering Services
Email: [log in to unmask]
Tel: (303) 684-7291
Fax: (303) 684-7268
Mobile: (303) 809-5815
-----------------------------------
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]]On Behalf Of Steve
Smith
Sent: Tuesday, January 10, 2006 6:33 AM
To: [log in to unmask]
Subject: Re: [DC] RoHS Compliance for bare PCB
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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