John,

AMEN..

nor would I tell the world that the really neat thing about lead-free solder is 

"In the era of cheaper, lighter, faster, and smaller, 
lead-free assembly enables closer pad spacing because 
>>>>>>  it does not wet as well as tin/lead solder. <<<<<<<
Because of >>>>>> this benefit,<<<<<< many lead-free products 
could not be manufactured with leaded solder."

that's right... lead-free is better because (drum roll please)
IT DOES NOT WET AS WELL AS TIN/LEAD SOLDER.............

If I recall my soldering basics, you can pretty much throw everything
out the window as long as you achieve GOOD wetting of both base metal surfaces.
Now POOR wetting is a BENEFIT!!!!!!!!!!!!!!!! I need a drink....

Gotta love an honest man!!!!!


Steve Mikell
[log in to unmask]

 ----- Original Message -----
> From: "John Burke" <[log in to unmask]>
> To: [log in to unmask]
> Subject: Re: [TN] [LF] RoHS Opposition (on Pb) isn't sound (SMT Sep 2006)
> Date:         Thu, 5 Oct 2006 10:56:17 -0700
> 
> 
> It's very interesting, If I were the chief technologist of a major solder
> supplier (which I am not) I would be taking the view that there were
> sufficient unknowns on reliability along with sufficient questions
> environmentally to take a neutral stance on the issues of lead free.
> 
> Were I in that position I would be:
> 
> 1       Telling the world that my company was at the leading edge of the
> technology and had/are undertaking extensive and exhaustive life cycle
> reliability testing - on  an initiative which after all is a law imposed on
> the industry and there is nothing that anyone right now can do about it.
> 
> 2       I would be remaining neutral on the environmental issues while
> actively encouraging further research on the issue publicly as an
> environmentally concerned company - all  with a strictly neutral viewpoint
> on the outcome.
> 
> 3       Actively seeking data from my extensive customer base on reliability
> and issues faced on a day to day basis on reliability and process issues.
> 
> Why? - because in that position I believe that to represent my
> (hypothetical) company correctly I would be somewhat negligent in making
> light of real data when after all the change to lead free is a "done deal"
> at least for the short term - so what's the point?.
> 
> I would also be looking at a future where in 20 20 hindsight in 2 years
> time, when the industry might be looking back at a very shaky period on
> reliability, I would not want my (non data founded) views coming up on a
> search engine when the words Lead free reliability along with my company
> name were typed into a search engine........
> 
> But that's just me................
> 
> John
> 


-- 
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