> After some rather worrisome reports from NASA, we have 
> decided  as a
> company to NOT
> use lead-free solder and fluxes on my clients' products. 
> We haven't
> regretted it, either.

Non -ROHS compliant is not an option is some cases - such as 
when selling in Europe.

At the risk of over generalising I'll suggest that ROHS is 
largely not a vast issue for devices with "normal" 
clearances dimensions and sizes. Issues such as 
solderability and inspection / testing need to be relearned 
at any scale of construction. But it's when you get down to 
sub sub mm pad clearances and say 0402 type component sizes 
that things start to matter.

Also, products with much longer than usual design lifetimes 
are liable to be at risk at almost any construction 
dimensions.

Tin whisker growth can become a crippling issue in such 
cases.



        Russell

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