Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Lead Free Prep.

Views: 2218

#55047

Lead Free Prep. | 11 June, 2008

We are currently completely building lead based assemblies. We are going to start doing our homework based on Management request. I have a pretty strange question that I was asked but really did not have an answer to. Can a Lead-Free assembly have a small percentage of lead in relationship to the weight of the finished product. We were thinking of building an assembly completely lead free with the exception of the wave process.

Our plan was to weigh the assmbly completely populated before and after the wave in order to get a weight of the lead solder that the wave will deposit. Is this a waste of time....

Thanks for the help.

reply »


JAX

#55048

Lead Free Prep. | 11 June, 2008

Don't waste your time. Allowable limits are not measured using the % weight of the entire assembly.

reply »


GSx

#55049

Lead Free Prep. | 11 June, 2008

Read the RoHS Directives 2005/95/EC what they say about % limits of lead in homogeneous part

http://www.berr.gov.uk/files/file29912.pdf

more infos:

http://www.ides.com/articles/rohs.asp

and see the emendment 2005/618/EC Article 1

http://europa.eu.int/eur-lex/lex/LexUriServ/site/en/oj/2005/l_214/l_21420050819en00650065.pdf

Enjoi.

Best Regards......GSx

reply »

#55054

Lead Free Prep. | 12 June, 2008

Your best bet is do your homework and read all the material about lead-free. IPC home page is your best site to visit.

reply »

#55064

Lead Free Prep. | 13 June, 2008

Thanks for the feedback everyone.

reply »

Reflow Oven

ii-feed SMD Intelligent Feeder