Interesting thread subject - I was not aware that the US had moved away from
leaded solder??



Hi Pratap am not sure where you are going with this. However on the points
below since you have addressed them to me, for the record.



1/ I do not believe that I have ever anywhere put into print or verbally
that I am "anti RoHS". I am definitely against the lead in solders
legislation on the basis that it is not now nor has ever been a problem and
that the legislation has been put in place without any regard for the
reality of imagined issues whatsoever. I am I have to state pro environment
if that helps - and the replacements for leaded solder have far more
environmental impact than the materials that they replace.



2/ It is not possible to "unspend" dollars already thrown into the lead free
solder debacle.



3/ I do not believe it is in anyone's interest to pass "anti RoHS"
legislation since it may have missed your attention but this is not a school
playground. It is up to a free trade system to decide what to buy outside of
a country where those materials are legislated - it is after all a free
market.



4/ As regards all of the other issues that you mention which have all been
leveled at lead free - the reliability and environmental issues will I
believe be the drivers to any reversal of current legislation.



As I said - it is a free market. I just purchased a new English sports bike,
and took the decision to purchase an "old stock" unused 2005 model - no
prizes for the answer to why I did that. I for one do not want anything
falling out of the sky, failures in safety critical equipment, or any other
failures due to the integrity of the interconnect method, that is why I and
others keep pushing back against the legislation - it is certainly not for
the hourly rate we get paid for doing it.



Kind regards









John Burke



  _____

From: Pratap Singh [mailto:[log in to unmask]]
Sent: Wednesday, December 06, 2006 6:03 PM
To: 'John Burke'
Cc: '(Leadfree Electronics Assembly Forum)'
Subject: US going back to Sn/Pb electronics manufacturing



John,



If EC has passed RoHS legislation, US can do the same and pass anti-RoHS
legislation.

Ask US Congress to ban all LF imports. Since US is the biggest electronics
product market in the world, suppliers will be falling over each other to
provide Sn/Pb products for US market. Alternately US can pull back all off
shore manufacturing and use Sn/Pb process to meet internal consumption of
electronics product.



As you and other anti-RoHS folks have explained so diligently, going back to
Sn/Pb will save hundreds of billions of $$$ due to:

1.      Lower power consumption in Sn/Pb processes
2.      Higher FPY and low scrap rate leading to cost reductions of US goods
3.      No new equipment for PIH and SMT assembly
4.      No training of workers in LF processes
5.      No research to build LF fatigue models
6.      Use of same FR4 PCBs
7.      No change of components to meet high LF process temperatures
8.      Less maintenance of wave solder due to elimination of LF impact on
solder pot
9.      No problems of solder mixing during assembly and repair
10.     No introduction of new fluxes or solder paste to meet high LF
temperatures
11.     No extra mining for Tin and Silver
12.     No risk of Tin Whiskers
13.     No solder joint failures at high stresses.



Congress can pass along these huge savings to electronics industry to set up
new assembly plants and generate thousands of jobs. It will be a bonanza for
pro-business lobby.

Since US designs are best in the world, some manufacturing can still be done
in Far East since they are already equipped for LF assembly and then sell to
EC countries.

That will allow US to compete in global economy and satisfy internal demand
of Sn/Pb electronics at the same time. It can be a win-win situation for
all.



Also imagine Air-Bus falling from the sky due to LF electronics, all
airlines will be ordering Boeing 747s instead. That will increase export of
US manufactured goods and eliminate trade deficit with China and Japan.

Imagine all hospital equipment in EC hospitals failing and causing many
patient deaths. Then US can sell US made hospital equipment to all hospitals
in EC and Far East. This scenario can be extended to many other fields like
autos, air conditioning, nuclear electronics etc. Your web site can be
central to expand this strategy.



Have a good day.













pratap singh

____________________________________

Tel/Fax: 512-255-6820; Cell: 512-663-8903

EMail: [log in to unmask]




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