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'[EE:] Get the lead out'
2004\08\30@132035 by Herbert Graf

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www.thestar.com/NASApp/cs/ContentServer?pagename=thestar/Layout/Article_Type1&c=Article&cid=1093818610487&call_pageid=971794782442&col=971886476975

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2004\08\31@052113 by Morgan Olsson

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Another thing that struck me about theese lead free solders:

The best of them greatly outperforms leaded solder in thermal/mechanical stress, and I *believe* (somebdy have data?) that they are:
o superior in heat transfer
o lower electric resistance

All of theese three are great benefits in power electronics :)

Downside is more aging of the components during soldering at higher temperature...  On the other hand this might drive development to more heat tolerant components so the total life actually increases...

/Morgan

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2004\08\31@052358 by Morgan Olsson

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Another thing that struck me about theese lead free solders:

The best of them greatly outperforms leaded solder in thermal/mechanical stress, and I *believe* (somebdy have data?) that they are:
o superior in heat transfer
o lower electric resistance

All of theese three are great benefits in power electronics :)

Downside is more aging of the components during soldering at higher temperature...  On the other hand this might drive development to more heat tolerant components so the total life actually increases...

/Morgan
--
Morgan Olsson, Kivik, Sweden

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'[EE:] Get the lead out'
2004\09\02@202359 by Russell McMahon
2004\09\03@030811 by Luis.Moreira
2004\09\03@042202 by Russell McMahon
2004\09\03@055122 by Luis.Moreira
2004\09\03@091356 by Ed Browne
2004\09\03@094636 by Herbert Graf
2004\09\03@094804 by Herbert Graf
2004\09\03@110524 by Luis.Moreira
2004\09\03@131657 by Matt Pobursky
2004\09\03@133901 by Dave VanHorn
2004\09\03@140852 by Carey Fisher - NCS
2004\09\03@143304 by Eisermann, Phil [Ridg/CO]
2004\09\03@143640 by hilip Stortz
2004\09\03@144318 by hilip Stortz
2004\09\03@144859 by Bob Axtell
2004\09\03@145102 by Eisermann, Phil [Ridg/CO]
2004\09\03@145533 by Dwayne Reid
2004\09\03@152620 by Dave VanHorn
2004\09\04@044147 by Peter L. Peres
2004\09\05@155750 by Peter L. Peres
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On Fri, 3 Sep 2004, Dave VanHorn wrote:

>
>>
>> There are many other ways besides banning the use of lead that could be
>> implemented to solve the "problem". I think instead, some powerful
>> group got the ear of the EU politicians and convinced them of a problem
>> which may or may not exist. Suggested solution? Ban lead in electronic
>> assemblies, after all "they sell MIILIONS of cell phones and toys
>> and... they all end up in the landfills! -- that MUST be causing a
>> problem" It all smacks of political expediency to me.
>
> Indeed. Expensive solutions to non-problems are depressingly popular.
>
> Remember Alar? Saccharine?

Just remember that 'expensive' automatically means 'someone makes money on
it'.

Peter
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