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In same board both leaded and lead-free components used.

imtiaz

#29475

In same board both leaded and lead-free components used. | 13 July, 2004

In one board we are using 213 SMT components out of which 23 components are lead-free and the rest are leaded. The paste used is also leaded. Do we have to make any changes in the profile of our reflow oven ? Also will there be any negative effect on the properties of leaded or lead-free components ?

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Kris

#29477

In same board both leaded and lead-free components used. | 13 July, 2004

Hi Imtiaz,

Can you give a brakup of the 23 components and their end mettalurgy ?

Chip ??

QFP/TSOP ??

BGA ??

Aluminium Caps ??

this will determine whether you can do it or not

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#29479

In same board both leaded and lead-free components used. | 13 July, 2004

While you're waiting for others to reply, consider searching the fine SMTnet Archives for threads like this: http://www.smtnet.com//forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=7290&#Message29140

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Grant Petty

#29489

In same board both leaded and lead-free components used. | 14 July, 2004

Hi,

What's the best process for going lead free? Ordering lead free parts and using them with current paste, and then once all the parts are lead free, moving to lead free paste as well?

Then the wave will be fun to change over. What a nightmare that's going to be. At least we purchased everything lead free compatioble, but throwing away thousands of dollars of lead solder's going to be fun.

Regards,

Grant

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