So what defines 'lead-free'? My opinion is that it depends ... If it's
'lead-free solder', then it refers to the solder.  If it's 'lead-free
product', then it refers to the entire product/module (including components,
PWBs, ...).

By the way, in terms of 'lead-free solder', there are two data points for
reference: 1) The U.S. General Services Administration defines lead-free
solder as having a Pb content of less than 0.2%; 2) The U.S. EPA defines
'lead-free solder' as having a Pb content of less than 0.1%.



Dongkai Shangguan, Ph.D.
Manager - Advanced Process Technology
Flextronics
2090 Fortune Drive
San Jose, CA 95131
(408) 428 1336


-----Original Message-----
From: Greg Vance [mailto:[log in to unmask]]
Sent: Thursday, May 31, 2001 8:46 AM
To: [log in to unmask]
Subject: [LF] What is lead free...


Silly question, what defines lead free?  Does this imply that there will be
no lead in the assembly or we will use no lead solder, but PCB finish and
some/all of the components may have SnPb plating on them... get my point?

I ask this from the perspective of:

1) printed circuit board finishes
2) components
3) solder materials

Greg Vance
Rockwell Automation
(330)487-6036

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