Wolf-Dieter:
First, thank you for reiterating a point that some of us have been making for quite a while
about the headlong plunge into lead-free solder: Expect many more assembly failures.
Electronics assembly 101 teaches that reliability goes down as heat applied during assembly
goes up. I wonder what in-house failure/scrap rate the Japanese manufacturers are experiencing
with lead-free production. And what is the field failure rate? We will never know the true
numbers.
Second, you jogged my memory about the "Japan is doing it, so we should, too" argument.
Basically, lead-free products thus far have been produced for marketing purposes. If American
companies can make money with a lead-free strategy, they will do it. But I haven't seen any
marketing studies on this list or anywhere else that say the benefits offset the costs and
risks. No matter what the studies say, I continue to assert that IPC and other industry
organizations should be working on providing an environment in which manufacturers are free to
make those marketing decisions.
Jim Smith
Managing Director
Cambridge Management Sciences, Inc.
4285 45th St. S.
St. Petersburg, FL 33711-4431
Tel: (727)866-6502 ext. 21
Fax: (727)867-7890
eMail: [log in to unmask]
"Schmidt, Wolf-Dieter" wrote:
> Jim,
>
> 'no invironmental problem' - that's the point. But on political discussions
> it's allways pointed out to be ! Somebody needed to find anything to solute
> the environmental problem and found lead in solder. For mee it's interesting
> (may be my information is wrong) the the US started with a 'lead ban act'
> but later withdraw (why ??). Then Japan came up, searching for alternative
> solutions, powered by a lot of money from the government. Europe started
> later and did it 150% - to my knowledge there is only Europe coming up with
> a law. But as far as I know there are some products taken out of the lead
> ban: military electronics and electronics for aircrafts......
>
> Next point: in the past I was engaged in design of RF-components for telecom
> radio links and now I'm busy on military radio. Both have the same problem:
> we've to guarantee 10 years of usage of our equipment. Can you imagin any
> PC, diskman, wolkman, playstation,.... etc with a guarantee of 10 years ??
> But the largest amount of electronics and as well of waste is produced by
> those things - and waste is a problem !! But within the waste there are a
> lot of critical materials. And I think that the percentage of lead within
> that waste is less than the percentage of use of lead for electronic
> purposes.
>
> To Erik de Kluizenaar I wrote the followoing:
> >> In my opinion we have the problem that
> - politicians (are there any people with technical education - I don't think
> so) decide to do something
> - managers in companies do accept or not those decisions
> but as most of them are so far away from technics they have problems in
> understanding
> The questions I hear:
> - do we need that whithin short time ( 2008 aint short)
> - do we earn money due to that
>
> So people like me have nearly no chance to change the situation. And it
> lookes like a lot of people in different companies have a comparable
> situation - the smaller the companies are the more problems like described
> we be present. Sometime I feel like Don Quichotte fighting the wind
> mills.................. <<
>
> I realize: that's no technical discussion but the writing of someone who is
> angry with politicians...
> There is a driving force in some areas of electronics to use leadfree
> solders but not because of environment but because of thermal problems (car
> electronics etc.). They have a specialized production focused on their
> special needs. But what's about smaller companies with a low production
> volume, having no inhouse production - working with outsourcing ? Most of
> those are very small companies as well and they have a problem to spend a
> lot of money for investigations. Do politicians know that - I can't believe.
>
> Best regards
> Wolf-Dieter Schmidt
> (Product-Engineer)
> SEL Defense Systems
> PO-Box 1760
> D-75117 Pforzheim
> Tel.: +49 7231 15 3386
> Fax: +49 7231 15 3390
> eMail: [log in to unmask]
>
> > -----Ursprüngliche Nachricht-----
> > Von: Jim Smith [SMTP:[log in to unmask]]
> > Gesendet am: Montag, 13. November 2000 22:27
> > An: [log in to unmask]
> > Betreff: Re: [LF] AW: [LF] OT Proportions
> >
> > Wolf-Dieter:
> >
> > Your computation shouldn't need any further comment, but I suspect you
> > will encounter plenty
> > of denunciation nonetheless. Solder lead (and component lead) is not an
> > environmental problem.
> > (And Erik de Kluizenaar has been waging a passionate and eloquent battle
> > for pragmatic
> > recycling that would take care of the whole nasty business.) When the
> > failure rate of critical
> > electronic assemblies rockets because of overheating components, I expect
> > mass changes of
> > minds. But it will be too late then, won't it?
> >
> > Jim Smith
> > Managing Director
> > Cambridge Management Sciences, Inc.
> > 4285 45th St. S.
> > St. Petersburg, FL 33711-4431
> > Tel: (727)866-6502 ext. 21
> > Fax: (727)867-7890
> > eMail: [log in to unmask]
> >
> > "Schmidt, Wolf-Dieter" wrote:
> >
> > > Hallo to all,
> > >
> > > just a few days ago I've got a statistic on lead consumtion worldwide -
> > let
> > > me give you some numbers out of it:
> > > 80.81 % storage batteries (have look into your car !)
> > > 4.69 % ammunition
> > > 1.40 % cable covering
> > > 0.49 % electronic solder
> > >
> > > By the way: I've made up a short calculation which shows: the lead
> > quantity
> > > within one car battery is the same as on ~ 30,000 square meters of
> > printed
> > > boards.
> > > This needs no further comment - or does it ?
> > >
> > > Best regards
> > > Wolf-Dieter Schmidt
> > > (Product-Engineer)
> > > SEL Defense Systems
> > > PO-Box 1760
> > > D-75117 Pforzheim
> > > Tel.: +49 7231 15 3386
> > > Fax: +49 7231 15 3390
> > > eMail: [log in to unmask]
> > >
> > > > -----Ursprüngliche Nachricht-----
> > > > Von: Brian Ellis [SMTP:[log in to unmask]]
> > > > Gesendet am: Sonntag, 12. November 2000 10:35
> > > > An: [log in to unmask]
> > > > Betreff: [LF] OT Proportions
> > > >
> > > > Today is the start of the "hunting" season in this little island.
> > > > According to the newspapers, there will be 50,000 so-called
> > "sportsmen"
> > > > in the hills, each using an average of 25 cartridges with 20 g of lead
> > > > shot (yes, it is still used). They take pot shots at anything that
> > they
> > > > think that moves, whether suitable for the pot or not (occasionally at
> > > > each other, as well, but perhaps not frequently enough). This makes me
> > > > thing we are talking about 25,000 kg of finely divided, easily
> > oxidised,
> > > > lead particles scattered indiscriminately over the whole countryside,
> > > > just in one day. If we take the 24 official days when hunting is
> > > > permitted plus all the poaching that occurs, we are therefore talking
> > > > about 500 to 1000 tonnes of lead.
> > > >
> > > > There is virtually no electronics industry in this country, so nearly
> > > > all the tin/lead alloy imported is in finished products plus the odd
> > > > reels of solder used by TV repair workshops. With a total population
> > of
> > > > about 500,000 in the free part of the country, the finished products
> > > > will be essentially TV sets, computers and (above all) cellphones (we
> > > > have proportionally the highest density of cellphones in the world,
> > > > according to the newspapers). How much solder will there be in the
> > > > 50,000 TVs, 75,000 PCs/monitors and 150,000 cellphones imported per
> > > > year? 1 tonne or maybe 2 tonnes, 40% of which is lead: less than
> > > > 1/1000th the amount of lead scattered about by hunters.
> > > >
> > > > Where is our sense of proportion?
> > > >
> > > > Brian
> > > >
> > > >
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