John
This one was particularly interesting for me, because I used to be a
supplier to all the factories involved (MC, ETA, EM Marin, Tissot, Omega
etc.). I knew personally some of the names mentioned. The Swatch Group
is the world's biggest watch maker, although a hefty part of their
profits come from the high-end quality mechanical watch market, rather
than the low-end Swatches, where the profit per piece is very small,
although the quantities are phenomenal.
I can testify that the guys are serious. The quartz resonator problem is
the more plausible. However, if I were the granter of exemptions, I
would wish to know more about their experience with other alloys. The
PCB, of course, does have small conductor spacings but they give no
examples of actual faults and 10Sn90Pb is surely not an acceptable
thermal problem. I may be wrong, but I have the impression of a small
amount of obtuseness between the lines.
Brian
John Burke wrote:
> Oh well you asked for it..
>
>
>
> I was looking through the EU web site for the latest round of exemptions,
>
>
>
> Swatch has an exemption request in on the latest round.Why? - Well being a
> typically efficient Swiss based company they started to task of RoHS
> conversion years ago. After 2 years of intensive research they implemented
> the process in mass production in June 2005, they started shipping and found
> massive problems with reliability due to tin whisker growth which caused
> them to stop shipping. They believe that this will be a problem with any
> pitch under 800 microns or around 32 thousandths of an inch.
>
>
>
> They have switched back to tin lead solder, and have applied for an
> exemption the document is on public display at the EU web site - here is the
> link which I have made into a small link here
>
>
>
> http://tinyurl.com/pkpz2
>
>
>
>
>
> If that site overloads don't blame me but do send me comments please through
> the site or by response to this email.
>
>
>
> John
>
>
>
> http://www.rohsusa.com <http://www.rohsusa.com/>
>
> http://www.rohseurope.com <http://www.rohseurope.com/>
>
> http://www.rohsasia.com <http://www.rohsasia.com/>
>
>
>
>
>
> _____
>
> From: John Burke [mailto:[log in to unmask]]
> Sent: Wednesday, May 10, 2006 1:02 AM
> To: 'TechNet'; 'Leadfree'
> Subject: Tin whisker position and China translation
>
>
>
> Just saw the iNEMI press release on tin whiskering, tin whiskering is now
> official??.... I also found on line the AeA translation of the China RoHS in
> the full version which might be a useful document. I have put the links in
> the library at <http://www.rohsusa.com/> http://www.rohsusa.com under the
> new technical papers banner, so just click on it, to get to the new papers
> and links. There are more to go up there but it's getting a bit late.
>
>
>
> I just had a really interesting email from a consultant in New Zealand who
> applied for an exemption in 2004 for lead in solders on environmental
> grounds - which apparently never made it through the TAC. I have asked him
> for permission to put the whole thing on line at the web site, but take this
> opportunity to quote a snippet from his e-mail:
>
> ============================================================================
> ===========================================
>
> The submission was unminuted in the unofficial TAC minutes but was minuted
> in the official minutes of the meeting 10 December 2004. The TAC overturned
> it with the comment "entry 19: as this is normal solder it should not be
> studied:" This is the only official record of the submission ever being
> made. I decided not to pursue further action as being a small
> company.............
>
>
>
> Curiouser and curiouser
>
>
>
> I will advise when I have the full thing on line and will link to his web
> site. If you do go to the RoHSUSA web site check out the "my 2 cents"
> feature if you want to get your views exposed to a large audience fast.
>
>
>
> Have a great day all.
>
>
>
> John
>
>
>
> http://www.rohsusa.com <http://www.rohsusa.com/>
>
> http://www.rohseurope.com <http://www.rohseurope.com/>
>
> http://www.rohsasia.com <http://www.rohsasia.com/>
>
>
>
>
>
> _____
>
> From: John Burke [mailto:[log in to unmask]]
> Sent: Monday, May 08, 2006 8:54 PM
> To: 'TechNet'; 'Leadfree'
> Subject: 100000 hits at Push back - thanks to all
>
>
>
> Thanks to all those that have been interested enough to go to the web site I
> put up 13 days ago. The site has taken over 100000 hits in that period.
> This week, to enhance the blog section I am putting up two new features, the
> first is an anonymous ftp site so that people can upload photo and text
> examples anonymously as they find issues without necessarily dragging the
> company name into the issue.
>
>
>
> The second item is a list server to enable people to discuss the items on
> the blog site, make improvement suggestions for the site, and be able to
> discuss the defects presented as they are sent in.
>
>
>
> If you want to be advised of upload instructions for the anonymous ftp site,
> or want to subscribe to the list server when we get it up please let me know
> by email or at http://www.rohsusa.com <http://www.rohsusa.com/>
>
>
>
> It is by the way free, and no we are not making any revenue from this
> operation it is a service to the electronics community. If you have not seen
> it yet swing by the blog site at http://www.rohsusa.com/blog if nothing else
> you might appreciate the English sense of humor..
>
>
>
>
>
> Kind regards.
>
>
>
> John
>
>
>
> http://www.rohsusa.com <http://www.rohsusa.com/>
>
> http://www.rohseurope.com <http://www.rohseurope.com/>
>
> http://www.rohsasia.com <http://www.rohsasia.com/>
>
>
>
>
>
>
>
>
>
>
>
>
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