[sdiy] SDIY vs RoHS

harrybissell harrybissell at prodigy.net
Sun May 22 20:54:43 CEST 2005


What the lead really does is give you a component with a really good
shelf life.  You could make them without lead, easily.  They might be good for one
year before they become unsolderable.

"they will have to pry my lead solder from my cold, dead fingers !!!"

H^) harry

Paul Schreiber wrote:

> >> I'd start worrying about the vanishing *DIP* package after July 2006 (RoHS
> >> requirements).
> >
> > What (chemical) difference exists between DIP/DIL and SO/QFP?
>
> DIP packages contain lead (in the solder that coats the pins). SOICs started
> converting over to lead-free tin plating about 1 year ago. By the end of this
> year, all SOIC/resistors/caps/etc will be lead-free. I suppose *gold-plated
> ceramic DIPS* are exempt :)
>
> If you look in the latest Mouser and Digikey catalog, you will see more emphasis
> placed on lead-free parts.
>
> Technically, you can use leaded solder IF the weight of the lead component is
> below like 85% of the TOTAL weight. But regular 60-40 type solder is about 94%
> lead (by weight, not by composition).
>
> But DIPs are not the only problem. What about the leads on resistors? Pots?
> Connectors? It gives me a headache.
>
> Paul S.




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