Greg, a few years ago I worked with the Pb-Free Focus Group. In
supplying components for that project I had to bring in packages with
hot solder dip, 63/37, on alloy 42 base metal. We had them redipped with
SnCu and it worked out great. I did have some of the redipped parts
microsectioned and EDX run on them, the lab found no Pb at the base
metal to SnCu interface.
It can be done. Cost would be the only downside.
There are companies that would be happy to perform the task for you.
Regards,
Mike Cottrell
QRA/Process/Process Development
Military Products Division
Office 903-868-6384
FAX 903-868-6247
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of Anderson, Greg (GE
Infrastructure)
Sent: Tuesday, October 12, 2004 12:13 PM
To: [log in to unmask]
Subject: Re: [LF] Remediating Pb Components to Pb-free
Bob et al:
Thank you for your responses. Unfortunately, my question was not
sufficiently clear. I am aware that the newer, RoHS compliant parts
will solder in my existing soldering systems (or in new, lead free
setups).
The problem is that there are a number of older, but economically
viable, electronic product designs that use "legacy" components that
WILL NOT be available from the manufacturer in a RoHS compliant version.
An example of such a component would be older computer chip sets, which
are virtually unavailable on the market. The chips in question
theoretically COULD BE designed out of the product, and a newer ones
designed in. However, the product sales volume is very low. Should a
company just abandon its customer base for such a product?
What I am looking for is a way to continue to make the product and still
be compliant.
Thanks,
Greg Anderson
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]]On Behalf Of Hilty, Robert D
Sent: Tuesday, October 12, 2004 12:57 PM
To: [log in to unmask]
Subject: Re: [LF] Remediating Pb Components to Pb-free
Greg:
The terminal finish on your components should not affect your soldering
profiles since pure tin solders as well as tin/lead coatings. Your
component suppliers should be able to provide you with lead free
versions.
If you must remove tin/lead plating this can be done (technically
feasible)
but will be costly. This is a significant rework to the component. By
using a lead free component (other than BGA devices) you can maintain
your
existing soldering methods and design.
Bob Hilty
Tyco Electronics
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]]On Behalf Of Anderson, Greg (GE
Infrastructure)
Sent: Tuesday, October 12, 2004 11:50 AM
To: [log in to unmask]
Subject: [LF] Remediating Pb Components to Pb-free
Forum:
With the more recent definition of homogeneous materials as less than 1%
of
essentially any material in/on components, my company has found itself
backed into a corner. We have many existing designs with legacy
components
that WILL NOT be manufactured "Pb-Free", but would be economically
unfeasible to redesign to incorporate newer, Pb-Free components.
As an option, I was asked if it were feasible "to strip the Pb from the
component leads, and re-apply a Pb-Free coating."
So, ignoring the remaining questions regarding whether or not the
"internals" are RoHS compliant, or if the "internals" could survive the
higher soldering temperatures, I ask the forum:
1) Is it technically feasible to perform such a remediation?
2) Are there companies that are actually performing this work (either
for
themselves or as a service?).
Thanks,
Greg Anderson
Manfacturing Engineer
GE Fanuc Automation
Charlottesville, VA
------------------------------------------------------------------------
----
---Leadfee Mail List provided as a service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Leadfree
To temporarily stop/(start) delivery of Leadree for vacation breaks
send:
SET Leadfree NOMAIL/(MAIL)
Search previous postings at: http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask]
or
847-615-7100 ext.2815
------------------------------------------------------------------------
----
---
------------------------------------------------------------------------
-------Leadfee Mail List provided as a service by IPC using LISTSERV
1.8d
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Leadfree
To temporarily stop/(start) delivery of Leadree for vacation breaks
send: SET Leadfree NOMAIL/(MAIL)
Search previous postings at: http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
------------------------------------------------------------------------
-------
------------------------------------------------------------------------
-------Leadfee Mail List provided as a service by IPC using LISTSERV
1.8d
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Leadfree
To temporarily stop/(start) delivery of Leadree for vacation breaks
send: SET Leadfree NOMAIL/(MAIL)
Search previous postings at: http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
------------------------------------------------------------------------
-------
-------------------------------------------------------------------------------Leadfee Mail List provided as a service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Leadfree
To temporarily stop/(start) delivery of Leadree for vacation breaks send: SET Leadfree NOMAIL/(MAIL)
Search previous postings at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-------------------------------------------------------------------------------
|
