Hmmm...
Actually they do recycle consumer electronics... There are hoards of Chinese
and Taiwanese that hand disassemble electronics and sell us back the parts
that we can't get anymore... you'd be surprised... Brokers are living high
on these recycled parts.
So you are saying that the solder on the PCB that gets put into the landfill
leaches into the ground water and poisons everything... ?
Do they have any science on that? Lead levels in ground water in ppm? Near a
land fill? Is the PH of ground water high enough to breakdown the tin/lead
solder so that the lead gets into the drinking water? I wonder if anything
lives in the areas where they mine the stuff...
Funny, I looked on the internet for a lead mining town and found this...
http://www.leadminingmuseum.co.uk/images/Village_view_modern.JPG
Bill Brooks
PCB Design Engineer , C.I.D., C.I.I.
Tel: (760)597-1500 Ext 3772 Fax: (760)597-1510
http://pcbwizards.com
-----Original Message-----
From: Louis Dallara [mailto:[log in to unmask]]
Sent: Saturday, September 11, 2004 3:56 PM
To: '(Designers Council Forum)'; 'Brooks,Bill'
Subject: RE: [DC] Lead free
Duh;
They recycle auto batteries, but not consumer electronics! I never got a
core deposit on a cell phone.
Car batteries never end up in land fills or Being recycled into China
landfills after they have pulled all the components off..
I guess you don't want to worry what you are passing on to future
generations
And it more than Pb that ends up in the water..
Lou /rant
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of
Brooks,Bill
Sent: Friday, September 10, 2004 6:11 PM
To: [log in to unmask]
Subject: [DC] Lead free
I talked with our ME's here and they inform me that the current process
of using tin/lead solder WILL BE COMPATIBLE with the new 'lead free'
parts that are being manufactured... So why change processes if you
don't need to deal with the EU...?
The ME's say they have real issues with inspecting high temp solder
joints that do not wet or wick like tin/lead solders... I would expect
more trouble with the ductility of other alloys too, so if your surface
mount board is undergoing thermal excursions and getting stressed at the
solder joints due to CTE mismatches the other alloys are more likely to
crack due to work hardening... and less ductility.
How much real research has been done into these alternative alloys? Do
you want to ride in a Space Shuttle with lead free solder joints? Or put
a pace maker in your chest that has lead free solder joints? Are they
truly reliable?
Who's really driving the move to lead free?
I still maintain that leaded car batteries are a much greater threat to
the environment than cell phones with solder on the small parts they
carry inside. Look at how many cars there are that have to change their
batteries every 5 years or less...
Bill Brooks
PCB Design Engineer , C.I.D., C.I.I.
Tel: (760)597-1500 Ext 3772 Fax: (760)597-1510 http://pcbwizards.com
-----Original Message-----
From: Dehoyos, Ramon [mailto:[log in to unmask]]
Sent: Wednesday, September 08, 2004 11:13 AM
To: [log in to unmask]
Subject: Re: [TN] Lead free
Since Japan is almost 100% lead free, what have they chosen as
their best alloy? or Europe?
Just a thought.
Ramon
-----Original Message-----
From: David Bergman [mailto:[log in to unmask]]
Sent: Wednesday, September 08, 2004 1:28 PM
To: Dehoyos, Ramon
Subject: RE: [TN] Lead free
Hi Ramon,
It will be interesting to see what Technet response is to this. My
personal opinion is that the industry is narrowing on the SAC alloy
(Tin/Silver/Copper). I also believe that the SAC 305 (3% Silver 0.5 %
copper, balance tin) will be the leading alloy. There is a significant
amount of R&D work looking at lower temperature alloys including Bismuth
and Zinc, but none of these are mainstream options yet.
Dave
David W. Bergman, CAE
Vice President, Standards, Technology and International Relations IPC
2215 Sanders Road #250 Northbrook, IL 60062-6135 Phone 847-790-5340 Fax
847-504-2340 Mobile 847-867-1388
email [log in to unmask] www.ipc.org
IPC IS MOVING: On Friday, September 17, IPC will be moving to a new
office location: 3000 Lakeside Drive, Suite 309 S, Bannockburn, IL,
60015. All phone, fax, web and e-mail service will be down from the
close of business on the 16th until Monday, September 20th. The new main
telephone number will be 1-847-615-7100 and the new main fax number will
be 1-847-615-7105. Direct phone numbers are not yet available. A
complete listing of all new direct phone numbers will be available when
confirmed by the phone company at www.ipc.org/move.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Dehoyos, Ramon
Sent: Wednesday, September 08, 2004 12:15 PM
To: [log in to unmask]
Subject: [TN] Lead free
Technetters:
Last time I checked there were more than a dozen different types
of lead free solders. Has the industry chosen the best one? Or is it
still experimenting with different types?
Regards,
Ramon
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