Right on John!
Unfortunately we are all "preaching to the choir" and our complaints are
falling on deaf ears.
This is a major revolution/ evolution in our industry that all consumers
should be aware of; yet the real media has said "zero". No one will
really understand why the return lines at the mall will be larger after
next xmas with people returning their electronic gifts. They will blame
cheap Chinese products, and the old saying will never be truer: They
sure don't make em like they used to".
asta
-----Original Message-----
From: Leadfree [mailto:[log in to unmask]] On Behalf Of John Barnes
Sent: Wednesday, July 26, 2006 7:04 PM
To: [log in to unmask]
Subject: Re: [LF] Propoganda or Fact?
Joe,
In my opinion, the RoHS Directive is probably the dumbest law to have
been enacted anywhere in the last 100 years-- because of its ban on lead
in electronics.
Since December 2004 I've collected over 8,000 books, CDROM's, papers,
reports, magazine articles, and web pages on:
* Leadfree electronics.
* RoHS Directive.
* WEEE Directive.
* Closely-related subjects-- going clear back to 1851.
My 2.06MB, 483-page bibliography may be downloaded for free from
http://www.dbicorporation.com/rohsbib.htm
Over the last 50 years lead-bearing electronics have established a very
good history of quality, reliability, longevity, and repairability.
Until recently (about April 2005 for me), most of us had never even
heard of:
* Tin whiskers.
* Tin pest (tin plague, tin leprosy, tin disease, tin blight).
* Shock-sensitivity.
* Kirkendall voids.
* Conductive anodic filaments (CAF).
But these failure modes threaten to become very common with lead-free
electronics. Then the high soldering temperatures, long time above
liquidus (TAL) to get adequate wetting, and poor moisture sensitivity
levels (MSL's) of lead-free solders and components make lead-free
electronics essentially unrepairable once they have left the
manufacturing area. Thus when a lead-free unit fails, it immediately
becomes junk and must be discarded/replaced.
My gut feel is that most lead-free electronics will be good for at least
*one year* if they aren't abused. But almost 100% of them will be
defunct within 5-7 years after they were manufactured because of the
failure mechanisms listed above.
John Barnes KS4GL, PE, NCE, NCT, ESDC Eng, ESDC Tech, PSE, SM IEEE
President, dBi Corporation
Author of Robust Electronic Design Reference Book, Volumes 1 & 2
http://www.dbicorporation.com/
------------------------------------------------------------------------
-------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
-------------------------------------------------------------------------------
|
