And that doesn't really solve your problem, because then you would have to change you p/n's a second time when upon completion of your transition. If I remember your original issue, it was how to identify the LF or RoHS compliant assemblies once all of the compliancy issues were resolved. You were changing your bare board to be compliant, but did not want to put the identifier in the silkscreen since the following processes were not compliant. Changing the part number now would require you to change it again once everything else was in place. This does not sound like an optimum solution.
 
Blair

>>> [log in to unmask] 02/04/05 08:28AM >>>
In principal I agree with you. However, if your product has been through a TÜV or UL certification and you change part numbers you may have to re-certify your product and this is not free.

This is becoming a nightmare!

-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Quintin Larson
Sent: Thursday, February 03, 2005 6:13 PM
To: [log in to unmask] 
Subject: Re: [LF] marking PWAs as lead-free

I agree.  One of the biggest headaches for companies moving forward is
going to be how to track components to ensure they do or do not have a
lead-(hazard)-free product.  The safest way is a new part number.

We anticipate having to control some portion of our inventory based on
date-code cut in, at least in the initial phases where there we will
build a mix of lead-bearing and lead-free boards, and see this as having
a large impact on our MRP system.

From a record keeping standpoint, especially if product isn't
serialized, it would be far and away much easier to have a new part
number for each component that is switched to lead-free.


Quintin Larson
Mfg. Eng.
Sanmina-SCI
222 Disk Drive
Rapid City, SD 57701
605-737-3789
E-mail: [log in to unmask] 

>>> [log in to unmask] 2/3/05 1:00:23 PM >>>
Phil,

I hope you plan on changing part numbers? We are changing all our end
product part numbers rather than trying to track RoHS compliance by
S/N.

It's a pain, but in the long run it is the best way, (in my opinion).

LF and RoHS compliant are two different aminals. LF has been around
for
years, RoHS is new and there are possible legal implications.





Rick Smith
Senior Product/ Component Engineer
ClearCube Technology
8834 Capital of Texas Highway North
Austin, TX 78759
Phone: (512)652-3544
Cell: (512)299-6925
Fax: (512)652-3545
[log in to unmask] 


-----Original Message-----
From: Phil Nutting [mailto:[log in to unmask]] 
Sent: Thursday, February 03, 2005 1:17 PM
To: (Leadfree Electronics Assembly Forum); Smith, Rick
Subject: RE: [LF] marking PWAs as lead-free

OK, but what if I want to be a good doobie and make sure if I have
tin/lead returns or lead-free returns that I can quickly identify
their
build origin for the proper rework process.  We do not serialize our
circuit boards so I can't use that data as an identifier.

-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Smith, Rick
Sent: Thursday, February 03, 2005 10:29 AM
To: [log in to unmask] 
Subject: Re: [LF] marking PWAs as lead-free

You should not worry too much about meeting any IPC-1066 marking
requirements. They are only guidelines for users to help identify LF
and
do not address the 29 substances WEEE/ RoHS is concerned with, only Pb
and PCB finishes.

Use of those labels is only optional, and will not satisfy the EU or
any
legal requirements.



-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Phil Nutting
Sent: Thursday, February 03, 2005 9:13 AM
To: [log in to unmask] 
Subject: Re: [LF] marking PWAs as lead-free

OK, but unless I scrap my bare board inventory so I can use a new silk
screen with the markings as outlined by IPC-1066 I will have some
boards
that have migrated to completely lead-free.  We are working on
changing
our board plating, component lead plating and solder, but this won't
be
a case of tin/lead on Friday and Lead-Free on Monday.  There will be
some transition period were it will come together for everything
except
the silk screen.  I've seen Kapton labels by Brady and others, but so
far I haven't seen anything that won't desolve in oil.  Maybe an epoxy
ink stamp would work for thouse boards.

-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Genny Gibbard
Sent: Wednesday, February 02, 2005 4:24 PM
To: [log in to unmask] 
Subject: Re: [LF] marking PWAs as lead-free

Until a product is fully converted is there any point in marking it as
being
in transition?  It either is or it isn't leadfree.  It is sort of like
(not
that this applies to that many on this forum...) being almost
pregnant.
You
either are or you aren't...

:-)

-----Original Message-----
From: Phil Nutting [mailto:[log in to unmask]] 
Sent: February 2, 2005 3:08 PM
To: [log in to unmask] 
Subject: [LF] marking PWAs as lead-free


The IPC-1066 standard is very clear for marking something that has
gone
through the full conversion cycle of lead-free, but for those boards
that are not yet fully converted, what marking schemes have been used?
We have the added wrinkle that some of our boards are submerged in a
dielectric oil and conventional label adhesives tend to desolve in
this
oil.

TIA,

Phil Nutting
Manufacturing Engineer
Kaiser Systems, Inc.
126 Sohier Road
Beverly, MA 01915
voice: 978-922-9300 x2315
fax: 978-977-3018
e-mail: [log in to unmask] <mailto:[log in to unmask]>
www.kaisersyst 


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