[tinwhiskers] Re: tinwhiskers Digest V1 #70
- From: "Rex Waygood" <Rex.Waygood@xxxxxxxxxxxxxxxxx>
- To: <tinwhiskers@xxxxxxxxxxxxx>
- Date: Wed, 27 Aug 2008 08:06:51 +0100
The high lead content solder has to be used for a technical reason such
as hierarchical soldering. No technical reason, no exemption.
I don't know where you live but disposal of fluorescent tubes in
landfill is illegal, they are hazardous/special waste. I pay a lot of
money to have them removed and disposed of legally and have the
paperwork to show that.
Rex Waygood
Technical Manager
PartnerTech Poole Ltd
Benson Road
Poole
Dorset BH17 0RY
United Kingdom
Tel: +44 (0)1202 674333
Fax: +44 (0)1202 678028
DDI: +44 (0)1202 338222
Mob: +44 (0)7887 997403
Rex.Waygood@xxxxxxxxxxxxxxxxx
www.PartnerTech.co.uk
-----Original Message-----
From: FreeLists Mailing List Manager [mailto:ecartis@xxxxxxxxxxxxx]
Sent: 27 August 2008 07:04
To: tinwhiskers digest users
Subject: tinwhiskers Digest V1 #70
tinwhiskers Digest Tue, 26 Aug 2008 Volume: 01 Issue: 070
In This Issue:
[tinwhiskers] Exemption on high temperature lead solder
[tinwhiskers] Re: Exemption on high temperature lead
solder
[tinwhiskers] Re: Exemption on high temperature lead
solder
[tinwhiskers] Re: Exemption on high temperature lead
solder
[tinwhiskers] Re: Exemption on high temperature lead
solder
[tinwhiskers] Re: Exemption on high temperature lead
solder
[tinwhiskers] Re: Exemption on high temperature lead
solder
[tinwhiskers] Re: Exemption on high temperature lead
solder
[tinwhiskers] Re: Exemption on high temperature lead
solder
[tinwhiskers] Re: Exemption on high temperature lead
solder
----------------------------------------------------------------------
Subject: [tinwhiskers] Exemption on high temperature lead solder
Date: Tue, 26 Aug 2008 14:24:19 +0200
From: "Niki Steenkamp" <niki@xxxxxxxxxxxxxx>
Hi,
I have been looking over some of the official RoHS documents and have
seen that there is an exemption on high temperature lead solder (more
than 85% lead). Not having done any more research on the subject I was
wondering:
* Why the exemption exists?
* Why not use more than 85% lead to circumvent the pure tin problem?
Maybe the temperature is unacceptably high?
I also noticed that mercury is limited but not banned in fluorescent
lights.
Just thinking of the millions of fluorescent lights being dumped in
landfills each year I cannot see how this can be viewed as acceptable
while ALL lead had to be removed from electronics. Furthermore, lead in
batteries are exempt. There is probably more lead in my car battery
than in a thousand PC motherboards and how many of these batteries end
up in landfills each year?
Just seems strangely warped...
Regards,
Niki
E-mail Disclaimer
http://www.sunspace.co.za/emaildisclaimer.htm
------------------------------
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Date: Tue, 26 Aug 2008 08:31:31 -0400
From: "Mason, Bert" <bertm@xxxxxxxxxxxxx>
Abandon all rationality Ye who enter the world of RoHS and the EU.
Welcome to our world
Best Regards,
Bert Mason
Quality Engineer
Formation Inc.
Building 1
121 Whittendale Dr.
Moorestown, NJ 08057
Phone: 856-380-2956
Fax: 856-234-5242
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx]On Behalf Of Niki Steenkamp
Sent: Tuesday, August 26, 2008 8:24 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Exemption on high temperature lead solder
Hi,
I have been looking over some of the official RoHS documents and have
seen that there is an exemption on high temperature lead solder (more
than 85% lead). Not having done any more research on the subject I was
wondering:
* Why the exemption exists?
* Why not use more than 85% lead to circumvent the pure tin problem?
Maybe the temperature is unacceptably high?
I also noticed that mercury is limited but not banned in fluorescent
lights.
Just thinking of the millions of fluorescent lights being dumped in
landfills each year I cannot see how this can be viewed as acceptable
while ALL lead had to be removed from electronics. Furthermore, lead in
batteries are exempt. There is probably more lead in my car battery
than in a thousand PC motherboards and how many of these batteries end
up in landfills each year?
Just seems strangely warped...
Regards,
Niki
E-mail Disclaimer
http://www.sunspace.co.za/emaildisclaimer.htm
------------------------------
From: "Parnagian, Ed" <ed.parnagian@xxxxxxxxxxx>
Date: Tue, 26 Aug 2008 15:03:58 +0200
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Hi, Bert!
Yes, it seems inconsistent with the stated objectives of RoHS, but it is
a good example of what pushing back with data can achieve.
These high lead-content solders all have very high melting points. They
are used by device manufacturers to make internal interconnects in
devices that have very high power densities.
Best regards,
Ed
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Mason, Bert
Sent: 2008 Aug 26 8:32 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Abandon all rationality Ye who enter the world of RoHS and the EU.
Welcome to our world
Best Regards,
Bert Mason
Quality Engineer
Formation Inc.
Building 1
121 Whittendale Dr.
Moorestown, NJ 08057
Phone: 856-380-2956
Fax: 856-234-5242
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx]On Behalf Of Niki Steenkamp
Sent: Tuesday, August 26, 2008 8:24 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Exemption on high temperature lead solder
Hi,
I have been looking over some of the official RoHS documents and have
seen that there is an exemption on high temperature lead solder (more
than 85% lead). Not having done any more research on the subject I was
wondering:
* Why the exemption exists?
* Why not use more than 85% lead to circumvent the pure tin problem?
Maybe the temperature is unacceptably high?
I also noticed that mercury is limited but not banned in fluorescent
lights.
Just thinking of the millions of fluorescent lights being dumped in
landfills each year I cannot see how this can be viewed as acceptable
while ALL lead had to be removed from electronics. Furthermore, lead in
batteries are exempt. There is probably more lead in my car battery
than in a thousand PC motherboards and how many of these batteries end
up in landfills each year?
Just seems strangely warped...
Regards,
Niki
E-mail Disclaimer
http://www.sunspace.co.za/emaildisclaimer.htm
The information contained in this message may be confidential and
legally protected under applicable law. The message is intended solely
for the addressee(s). If you are not the intended recipient, you are
hereby notified that any use, forwarding, dissemination, or reproduction
of this message is strictly prohibited and may be unlawful. If you are
not the intended recipient, please contact the sender by return e-mail
and destroy all copies of the original message.
------------------------------
From: "Parnagian, Ed" <ed.parnagian@xxxxxxxxxxx>
Date: Tue, 26 Aug 2008 15:14:22 +0200
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Hi, Nikki!
Sorry, but my email app sorts from most recent down, so didn't notice
that you were the originator of these questions. So here is my
perspective. And yes, it seems inconsistent with the stated objectives
of RoHS, but it is a good example of what pushing back with data can
achieve.
These high lead-content solders all have very high melting points. They
are used by device manufacturers to make internal interconnects in
devices that have very high power densities.
The small amount of mercury in flouresent lights is part of the internal
coating on the glass. And the fact that these tubes won't emit an
acceptable spectrum of light without the mercury. Combine that with the
prospect of replacing all those flouresents with incandesents would
consume even more electricity. And by the way, those tubes ought to be
treated as hazardous waste and turned into the local municipality as
such, not put in the weekly trash. My town won't knowingly pick them
up.
Best regards,
Ed
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Niki Steenkamp
Sent: 2008 Aug 26 8:24 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Exemption on high temperature lead solder
Hi,
I have been looking over some of the official RoHS documents and have
seen that there is an exemption on high temperature lead solder (more
than 85% lead). Not having done any more research on the subject I was
wondering:
* Why the exemption exists?
* Why not use more than 85% lead to circumvent the pure tin problem?
Maybe the temperature is unacceptably high?
I also noticed that mercury is limited but not banned in fluorescent
lights.
Just thinking of the millions of fluorescent lights being dumped in
landfills each year I cannot see how this can be viewed as acceptable
while ALL lead had to be removed from electronics. Furthermore, lead in
batteries are exempt. There is probably more lead in my car battery
than in a thousand PC motherboards and how many of these batteries end
up in landfills each year?
Just seems strangely warped...
Regards,
Niki
E-mail Disclaimer
http://www.sunspace.co.za/emaildisclaimer.htm
The information contained in this message may be confidential and
legally protected under applicable law. The message is intended solely
for the addressee(s). If you are not the intended recipient, you are
hereby notified that any use, forwarding, dissemination, or reproduction
of this message is strictly prohibited and may be unlawful. If you are
not the intended recipient, please contact the sender by return e-mail
and destroy all copies of the original message.
------------------------------
From: "Mike Finczak" <mike@xxxxxxxxxxxxx>
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Date: Tue, 26 Aug 2008 10:53:08 -0400
Niki, Bert and Ed,
Take a look at this article posted on TomsHardware regarding
Nvidia GPU failures. The failures may have been caused by
the use of High Lead solder.
http://www.tomshardware.com/news/Nvidia-GPU-failure,6248.html
Regards,
Mike Finczak
CopperCAD Design
www.CopperCAD.com
905-488-8958
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Parnagian, Ed
Sent: Tuesday, August 26, 2008 9:04 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Hi, Bert!
Yes, it seems inconsistent with the stated objectives of RoHS, but it is
a good example of what pushing back with data can achieve.
These high lead-content solders all have very high melting points. They
are used by device manufacturers to make internal interconnects in
devices that have very high power densities.
Best regards,
Ed
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Mason, Bert
Sent: 2008 Aug 26 8:32 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Abandon all rationality Ye who enter the world of RoHS and the EU.
Welcome to our world
Best Regards,
Bert Mason
Quality Engineer
Formation Inc.
Building 1
121 Whittendale Dr.
Moorestown, NJ 08057
Phone: 856-380-2956
Fax: 856-234-5242
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx]On Behalf Of Niki Steenkamp
Sent: Tuesday, August 26, 2008 8:24 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Exemption on high temperature lead solder
Hi,
I have been looking over some of the official RoHS documents and have
seen that there is an exemption on high temperature lead solder (more
than 85% lead). Not having done any more research on the subject I was
wondering:
* Why the exemption exists?
* Why not use more than 85% lead to circumvent the pure tin problem?
Maybe
the temperature is unacceptably high?
I also noticed that mercury is limited but not banned in fluorescent
lights.
Just thinking of the millions of fluorescent lights being dumped in
landfills each year I cannot see how this can be viewed as acceptable
while ALL lead had to be removed from electronics. Furthermore, lead in
batteries are exempt. There is probably more lead in my car battery
than in a thousand PC motherboards and how many of these batteries end
up in landfills each year?
Just seems strangely warped...
Regards,
Niki
E-mail Disclaimer
http://www.sunspace.co.za/emaildisclaimer.htm
The information contained in this message may be confidential and
legally protected under applicable law. The message is intended solely
for the addressee(s). If you are not the intended recipient, you are
hereby notified that any use, forwarding, dissemination, or reproduction
of this message is strictly prohibited and may be unlawful. If you are
not the intended recipient, please contact the sender by return e-mail
and destroy all copies of the original message.
------------------------------
From: "Parnagian, Ed" <ed.parnagian@xxxxxxxxxxx>
Date: Tue, 26 Aug 2008 17:25:47 +0200
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Really good information, Mike!
This could really be another tip on the RoHS iceberg. I believe that
high lead-content solders have been around for quite a few years, but
this could be that there is a "new" succeptibility for high lead solders
associated with the higher processing temperatures associated with
SAC305 assembly processes?
This looks like something that should be hitting the CPUs, as well. The
really sad thing about this is that the general public is oblivious to
the uncertain product quality that they are laying down their money for.
And if anyone in industry tries to wake them, that person's employer
will get a blackeye, the we all know what that will result in for the
employee.
Very troubling,
Ed
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Mike Finczak
Sent: 2008 Aug 26 10:53 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Niki, Bert and Ed,
Take a look at this article posted on TomsHardware regarding
Nvidia GPU failures. The failures may have been caused by
the use of High Lead solder.
http://www.tomshardware.com/news/Nvidia-GPU-failure,6248.html
Regards,
Mike Finczak
CopperCAD Design
www.CopperCAD.com
905-488-8958
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Parnagian, Ed
Sent: Tuesday, August 26, 2008 9:04 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Hi, Bert!
Yes, it seems inconsistent with the stated objectives of RoHS, but it is
a good example of what pushing back with data can achieve.
These high lead-content solders all have very high melting points. They
are used by device manufacturers to make internal interconnects in
devices that have very high power densities.
Best regards,
Ed
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Mason, Bert
Sent: 2008 Aug 26 8:32 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Abandon all rationality Ye who enter the world of RoHS and the EU.
Welcome to our world
Best Regards,
Bert Mason
Quality Engineer
Formation Inc.
Building 1
121 Whittendale Dr.
Moorestown, NJ 08057
Phone: 856-380-2956
Fax: 856-234-5242
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx]On Behalf Of Niki Steenkamp
Sent: Tuesday, August 26, 2008 8:24 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Exemption on high temperature lead solder
Hi,
I have been looking over some of the official RoHS documents and have
seen that there is an exemption on high temperature lead solder (more
than 85% lead). Not having done any more research on the subject I was
wondering:
* Why the exemption exists?
* Why not use more than 85% lead to circumvent the pure tin problem?
Maybe
the temperature is unacceptably high?
I also noticed that mercury is limited but not banned in fluorescent
lights.
Just thinking of the millions of fluorescent lights being dumped in
landfills each year I cannot see how this can be viewed as acceptable
while ALL lead had to be removed from electronics. Furthermore, lead in
batteries are exempt. There is probably more lead in my car battery
than in a thousand PC motherboards and how many of these batteries end
up in landfills each year?
Just seems strangely warped...
Regards,
Niki
E-mail Disclaimer
http://www.sunspace.co.za/emaildisclaimer.htm
The information contained in this message may be confidential and
legally protected under applicable law. The message is intended solely
for the addressee(s). If you are not the intended recipient, you are
hereby notified that any use, forwarding, dissemination, or reproduction
of this message is strictly prohibited and may be unlawful. If you are
not the intended recipient, please contact the sender by return e-mail
and destroy all copies of the original message.
The information contained in this message may be confidential and
legally protected under applicable law. The message is intended solely
for the addressee(s). If you are not the intended recipient, you are
hereby notified that any use, forwarding, dissemination, or reproduction
of this message is strictly prohibited and may be unlawful. If you are
not the intended recipient, please contact the sender by return e-mail
and destroy all copies of the original message.
------------------------------
Date: Tue, 26 Aug 2008 08:46:26 -0700
From: Steve Smith <steve@xxxxxxxxxxxxxxxxxxxxxx>
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Hello Ed and Mike
The Truth Is Out There.
Just refer the general public to this Knol(a unit of knowledge, courtesy
of Google), published in Google's new on-line encyclopedia:
http://knol.google.com/k/steve-smith/tin-whiskers/e1osj187cpek/6#
Tell your local radio station, television station and newspaper anywhere
in the world that here is the Truth about a very controversial hot
story.
Steve Smith
> Really good information, Mike!
> This could really be another tip on the RoHS iceberg. I believe that
> high lead-content solders have been around for quite a few years, but
> this could be that there is a "new" succeptibility for high lead
> solders associated with the higher processing temperatures associated
> with SAC305 assembly processes?
> This looks like something that should be hitting the CPUs, as well.
> The really sad thing about this is that the general public is
> oblivious to the uncertain product quality that they are laying down
> their money for. And if anyone in industry tries to wake them, that
> person's employer will get a blackeye, the we all know what that will
> result in for the employee.
> Very troubling,
> Ed
> -----Original Message-----
> From: tinwhiskers-bounce@xxxxxxxxxxxxx
> [mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Mike Finczak
> Sent: 2008 Aug 26 10:53 AM
> To: tinwhiskers@xxxxxxxxxxxxx
> Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
> Niki, Bert and Ed,
> Take a look at this article posted on TomsHardware regarding
> Nvidia GPU failures. The failures may have been caused by
> the use of High Lead solder.
> http://www.tomshardware.com/news/Nvidia-GPU-failure,6248.html
> Regards,
> Mike Finczak
> CopperCAD Design
> www.CopperCAD.com
> 905-488-8958
> -----Original Message-----
> From: tinwhiskers-bounce@xxxxxxxxxxxxx
> [mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Parnagian, Ed
> Sent: Tuesday, August 26, 2008 9:04 AM
> To: tinwhiskers@xxxxxxxxxxxxx
> Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
> Hi, Bert!
> Yes, it seems inconsistent with the stated objectives of RoHS, but it
> is a good example of what pushing back with data can achieve.
> These high lead-content solders all have very high melting points.
> They are used by device manufacturers to make internal interconnects
> in devices that have very high power densities.
> Best regards,
> Ed
> -----Original Message-----
> From: tinwhiskers-bounce@xxxxxxxxxxxxx
> [mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Mason, Bert
> Sent: 2008 Aug 26 8:32 AM
> To: tinwhiskers@xxxxxxxxxxxxx
> Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
> Abandon all rationality Ye who enter the world of RoHS and the EU.
> Welcome to our world
> Best Regards,
> Bert Mason
> Quality Engineer
> Formation Inc.
> Building 1
> 121 Whittendale Dr.
> Moorestown, NJ 08057
> Phone: 856-380-2956
> Fax: 856-234-5242
> -----Original Message-----
> From: tinwhiskers-bounce@xxxxxxxxxxxxx
> [mailto:tinwhiskers-bounce@xxxxxxxxxxxxx]On Behalf Of Niki Steenkamp
> Sent: Tuesday, August 26, 2008 8:24 AM
> To: tinwhiskers@xxxxxxxxxxxxx
> Subject: [tinwhiskers] Exemption on high temperature lead solder
> Hi,
> I have been looking over some of the official RoHS documents and have
> seen that there is an exemption on high temperature lead solder (more
> than 85% lead). Not having done any more research on the subject I
> was
> wondering:
> * Why the exemption exists?
> * Why not use more than 85% lead to circumvent the pure tin problem?
> Maybe
> the temperature is unacceptably high?
> I also noticed that mercury is limited but not banned in fluorescent
> lights.
> Just thinking of the millions of fluorescent lights being dumped in
> landfills each year I cannot see how this can be viewed as acceptable
> while ALL lead had to be removed from electronics. Furthermore, lead
> in batteries are exempt. There is probably more lead in my car
> battery than in a thousand PC motherboards and how many of these
> batteries end up in landfills each year?
> Just seems strangely warped...
> Regards,
> Niki
> E-mail Disclaimer
> http://www.sunspace.co.za/emaildisclaimer.htm
> The information contained in this message may be confidential and
> legally protected under applicable law. The message is intended solely
> for the addressee(s). If you are not the intended recipient, you are
> hereby notified that any use, forwarding, dissemination, or
> reproduction of this message is strictly prohibited and may be
> unlawful. If you are not the intended recipient, please contact the
> sender by return e-mail and destroy all copies of the original
message.
--
Best regards,
Steve Smith
www.consultingscientist.us
http://www.pickensplan.com/
------------------------------
From: Engelmaier@xxxxxxx
Date: Tue, 26 Aug 2008 12:21:39 EDT
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Hi Ed,
There are a number of possible and possibly interacting scenarios.
1) larger CPU chips are subject to larger 'global' and 'local' thermal
expansion mismatches-- using eutectic SnPb does help the 'global'
mismatch and there is a design solution for the 'local' mismatch;
2) the higher soldering T's required for SAC solders produce larger
'global'
and 'local' thermal expansion mismatches--that is a direct fault of
RoHS;
3) reduced solder joint thickness [to reduce overall package thickness]
produces higher cyclic SJ strains for the same 'global' expansion
mismatch.
Werner
Future workshops:
Pb-Free Soldering Processes: Survival, Quality, Reliability, September
3, Stockholm, Sweden Reliability Issues with Lead-Free Soldering
Processes, September 22, Schaumburg Failure Mode and Root Cause Analyses
Reliability (Fatigue, Brittle Fracture, ENIG), September 22, Schaumburg
Solder Joint Reliability: Parts 1 & 4, Oct. 9, Moscow, Russia Solder
Joint Reliability: Part 4, Oct. 17, Timisoara, Rumania Solder Joint
Reliability: Parts 1 & 4, Oct. 22, Tallinn, Estonia
**************
It's only a deal if it's where you want to go. Find your travel deal
here.
(http://information.travel.aol.com/deals?ncid=aoltrv00050000000047)
------------------------------
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Date: Tue, 26 Aug 2008 12:21:43 -0400
From: "Fritz, Dennis D." <DENNIS.D.FRITZ@xxxxxxxx>
What is being described here is the C4 technology of flip chips. Here
is a Wikipedia link to the description of "Controlled Collapse Chip
Connection" - the C4. High lead balls have been used in this
application since IBM invented this in the 60's, and I think this is the
basis for the RoHS exemption. Now that eutectic or SAC are being
considered, I would expect the RoHS exemption to go away.
http://en.wikipedia.org/wiki/Flip_chip
Denny Fritz, SAIC
________________________________
From: tinwhiskers-bounce@xxxxxxxxxxxxx on behalf of Mike Finczak
Sent: Tue 8/26/2008 10:53 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Niki, Bert and Ed,
Take a look at this article posted on TomsHardware regarding
Nvidia GPU failures. The failures may have been caused by
the use of High Lead solder.
http://www.tomshardware.com/news/Nvidia-GPU-failure,6248.html
Regards,
Mike Finczak
CopperCAD Design
www.CopperCAD.com
905-488-8958
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Parnagian, Ed
Sent: Tuesday, August 26, 2008 9:04 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Hi, Bert!
Yes, it seems inconsistent with the stated objectives of RoHS, but it is
a good example of what pushing back with data can achieve.
These high lead-content solders all have very high melting points. They
are used by device manufacturers to make internal interconnects in
devices that have very high power densities.
Best regards,
Ed
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Mason, Bert
Sent: 2008 Aug 26 8:32 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Abandon all rationality Ye who enter the world of RoHS and the EU.
Welcome to our world
Best Regards,
Bert Mason
Quality Engineer
Formation Inc.
Building 1
121 Whittendale Dr.
Moorestown, NJ 08057
Phone: 856-380-2956
Fax: 856-234-5242
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx]On Behalf Of Niki Steenkamp
Sent: Tuesday, August 26, 2008 8:24 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Exemption on high temperature lead solder
Hi,
I have been looking over some of the official RoHS documents and have
seen that there is an exemption on high temperature lead solder (more
than 85% lead). Not having done any more research on the subject I was
wondering:
* Why the exemption exists?
* Why not use more than 85% lead to circumvent the pure tin problem?
Maybe
the temperature is unacceptably high?
I also noticed that mercury is limited but not banned in fluorescent
lights.
Just thinking of the millions of fluorescent lights being dumped in
landfills each year I cannot see how this can be viewed as acceptable
while ALL lead had to be removed from electronics. Furthermore, lead in
batteries are exempt. There is probably more lead in my car battery
than in a thousand PC motherboards and how many of these batteries end
up in landfills each year?
Just seems strangely warped...
Regards,
Niki
E-mail Disclaimer
http://www.sunspace.co.za/emaildisclaimer.htm
The information contained in this message may be confidential and
legally protected under applicable law. The message is intended solely
for the addressee(s). If you are not the intended recipient, you are
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Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Date: Tue, 26 Aug 2008 09:31:02 -0700
From: "White, Robert" <Robert.White@xxxxxxxxxxxxx>
I don't think it will go away anytime soon since the exemption is also
used for die attach in high power semi-conductors used in power diodes,
IGBT's and FET's. Power supplies, as well as many other applications,
including power conversion for all the new alternative energy solutions,
require high power semi-conductors.
Best Regards,
Bob White
Director of Safety and Environmental Compliance
Power-One, Inc.
Tel: (805) 384-5391
Cell: (805) 469-4347
________________________________
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Fritz, Dennis D.
Sent: Tuesday, August 26, 2008 9:22 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: RE: [tinwhiskers] Re: Exemption on high temperature lead solder
What is being described here is the C4 technology of flip chips. Here
is a Wikipedia link to the description of "Controlled Collapse Chip
Connection" - the C4. High lead balls have been used in this
application since IBM invented this in the 60's, and I think this is the
basis for the RoHS exemption. Now that eutectic or SAC are being
considered, I would expect the RoHS exemption to go away.
http://en.wikipedia.org/wiki/Flip_chip
Denny Fritz, SAIC
________________________________
From: tinwhiskers-bounce@xxxxxxxxxxxxx on behalf of Mike Finczak
Sent: Tue 8/26/2008 10:53 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Niki, Bert and Ed,
Take a look at this article posted on TomsHardware regarding
Nvidia GPU failures. The failures may have been caused by
the use of High Lead solder.
http://www.tomshardware.com/news/Nvidia-GPU-failure,6248.html
Regards,
Mike Finczak
CopperCAD Design
www.CopperCAD.com
905-488-8958
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Parnagian, Ed
Sent: Tuesday, August 26, 2008 9:04 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Hi, Bert!
Yes, it seems inconsistent with the stated objectives of RoHS, but it is
a good example of what pushing back with data can achieve.
These high lead-content solders all have very high melting points. They
are used by device manufacturers to make internal interconnects in
devices that have very high power densities.
Best regards,
Ed
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Mason, Bert
Sent: 2008 Aug 26 8:32 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Re: Exemption on high temperature lead solder
Abandon all rationality Ye who enter the world of RoHS and the EU.
Welcome to our world
Best Regards,
Bert Mason
Quality Engineer
Formation Inc.
Building 1
121 Whittendale Dr.
Moorestown, NJ 08057
Phone: 856-380-2956
Fax: 856-234-5242
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx]On Behalf Of Niki Steenkamp
Sent: Tuesday, August 26, 2008 8:24 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Exemption on high temperature lead solder
Hi,
I have been looking over some of the official RoHS documents and have
seen that there is an exemption on high temperature lead solder (more
than 85% lead). Not having done any more research on the subject I was
wondering:
* Why the exemption exists?
* Why not use more than 85% lead to circumvent the pure tin problem?
Maybe
the temperature is unacceptably high?
I also noticed that mercury is limited but not banned in fluorescent
lights.
Just thinking of the millions of fluorescent lights being dumped in
landfills each year I cannot see how this can be viewed as acceptable
while ALL lead had to be removed from electronics. Furthermore, lead in
batteries are exempt. There is probably more lead in my car battery
than in a thousand PC motherboards and how many of these batteries end
up in landfills each year?
Just seems strangely warped...
Regards,
Niki
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