Ah come on... Get the lead out... It's toxic !!
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of
George Patrick
Sent: Friday, September 10, 2004 6:30 PM
To: [log in to unmask]
Subject: Re: [DC] [TN]/[DC Lead free
As usual, politics is king. The EU may be new as a political body, but
the politicians involved with it have had centuries to develop their
craft in their individual countries.
Make people think you are doing something without doing any real
research...
This has been beaten to death, the EU is not going to change their minds
just because it's silly. And don't hold your breath, I would not be
surprised to see Oregon or Vermont enact similar legislation :)
--
George Patrick
Tektronix, Inc.
Central Engineering, PCB Design Group
P.O. Box 500, M/S 39-512
Beaverton, OR 97077-0001
Phone: 503-627-5272 Fax: 503-627-5587
http://www.tektronix.com http://www.pcb-designer.com
It's my opinion, not Tektronix'
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Brooks,Bill
Sent: Friday, September 10, 2004 15:05
To: [log in to unmask]
Subject: Re: [TN] 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
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-----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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