I will say again - I think what the forum is seeking is a common mark to place on a finished product, e.g. telephone, fridge, washing machine, TV etc. to easily identify it is RoHS compliant.
At component level I agree RohS compliance means little beyond the part not containing the restricted substances.
Process parameters like MSL, reflow dwell times and temperature and peak reflow temps are an entirely different matter and can be batch, or for silicon, foundry dependent and will usually be found on the outer hermetic wrapper of such components. Currently we are finding even the big component mfrs very cagey at quoting these parameters for their "RoHS compliant" offerings.
Regards,
Chris
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Stobbe, Irina
Sent: 27 January 2005 10:43
To: [log in to unmask]
Subject: [LF] AW: [LF] RoHS Labelling again!
Dear Paul, dear All,
Let me contribute some remarks
- What does it means: RoHS-compliant? RoHS requires only the producer of
products directed to the customer to be lead (and the other five materials)
free. RoHS is not a Directive applicable to each producer of components or
to EMS. So somebody should define the intention what "RoHS compliant" means:
that a sub-product can be a part of/ integrated in a product, falling under
the RoHS directive. This understanding should be common! (May be in a better
English)
- A component or subassembly that fulfils the requirements, esp. the limits
of the material content values of the RoHS, could not fulfil the
requirements of lead-free processing regarding the peak temperature and the
moisture levels. It makes no sense to summarize these properties under the
"RoHS-compliance" - you need an additional information field to keep this
info for the future.
- One "RoHS-compliant" sign could get information that a component or
assembly fulfils the limits of the material content values of the RoHS in
2006, including the exemptions at this time. In 2010 at least there will
precede a review of the exemptions, and some of them may change. If you
didn't mark around your RoHS-compliant sign, which exemptions are used, so
you can not be sure in 2010, that you are already compliant.
- Until now three standards were developed: the JEITA ETR-7021 and the close
together IPC-1066 and JEDEC JESD97. This gives the possibility to join to
these standards. The IPC-1066 and JESD97 does not solve the "RoHS-compliant"
problems, because no exemptions are permitted. In the Japanese standard you
have the possibility to mark with "R-Pb" in a rectangle. IPC-1066 and
JESD97 propose to announce the maximum save assembly temperature. The
difference in lead-free signs is the direction of the crossing line through
the traffic sign with Pb: From top left to down right in US , from top right
to down left in Japan! Significant !?!? :-)
- Information about the labeling issue were collected in the European
Lead-free Project EFSOT, with close contact to Kay Nimmo from Soldertec. You
will find the labeling related part here: http://www.efsot-europe.info/?517
- RoHS marking is a challenge to logistics in the supply chain, isn't it.
For a long time you will have more variant subassemblies with different
properties in material and physics. Seems, that only with a traceability
system beginning from the procurement you will be prepared o meet the
requirements.
With regards
Irina Stobbe
European EFSOT Project
http://www.efsot-europe.info
IMS Project EFSOT
http://efsot.info
*******************************************************************
BeCAP - Berlin Center of Advanced Packages
a cooperation between
Technische Universität Berlin
Fak. IV Elektrotechnik/Informatik,
Forschungsschwerpunkt Technologien der Mikroperipherik and
Fraunhofer Institut
für Zuverlässigkeit und Mikrointegration (IZM)
Dr. Irina Stobbe
c/o Fraunhofer IZM
Dep. Environmental Engineering
Gustav-Meyer-Allee 25, Gebäude 17
D-13355 Berlin
Access:S1,S2 - Humboldthain, U8 - Voltastraße
Tel: +49 (30) 46403-156, -130, Fax: +49 (30) 46403-131
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-----Ursprüngliche Nachricht-----
Von: Leadfree [mailto:[log in to unmask]] Im Auftrag von to Paul Taylor
Gesendet: Dienstag, 25. Januar 2005 18:12
An: [log in to unmask]
Betreff: [LF] RoHS Labelling again!
Dear All
I know this subject has been banded about a couple of times, but i was
interested in the direction some of you guys are going on this subject.
The WEEE labelling appears to be sorted (crossed out wheelie bin etc), and
so to is the PCB assembly identification (as supplied by Jedec), but what
about RoHS?.
There appears to be no "general purpose label" for the RoHS compliance on
the market, which I see as important, I think that the people who set out
the WEEE label should have done a RoHS one as well at the same time, its not
rocket science is it?.
The problem for many of you, like the company I'm working for, is that
there is a long supply chain and multiple stores locations, we also have
parts back in for refurbish and we out source both assembly work and units
to sub-contractors and OEMs alike and we assemble in house as well, in
general we have parts every where. We have many assemblies that are either
"RoHS compliant" or will be either coming in "RoHS compliant" over the next
17 months. We wish to label these as compliant so that we can ensure that
our stocks have been properly stock turned and also to maintain
traceability. Obviously we don't want to label every nut and bolt, but we
do want to label the 'higher level assemblies' that are compliant, and also
importantly identify the outside of our units, as basically after conversion
there would be no visible differences.
If other companies are labelling their units, what symbol is being used? As
one problem for our goods inwards is identifying the 'RoHS compliancy'
label for every supplier!!
My suggestion would the a simple (light )green "RoHS" in plain Arial text,
maybe the directive number in small print underneath, does any one else have
any ideas.
regards
Paul
PS Perhaps I should patent my label!!!!!
Paul R Taylor
Senior Engineer, Product Supply Group
Pitney Bowes Ltd
email: [log in to unmask]
website: www.pb.com
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