At 09.56 2011.10.17, you wrote:
>Electron <electron2k4 <at> infinito.it> writes:
>> can (for personal use) lead solder be used on RoHS chips without any con=
cern?
>> Or the best soldering is achieved by using RoHS (lead free) solders?
>
>Yes, with new parts (never soldered), but not for bgas (mixing rohs=20
>and non rohs
>balls).
>
>The problems appear when even small amounts of rohs solder mix with differ=
ent
>type rohs solder and/or leaded. The problems consist in the solder turning=
 into
>murky clumpy metal paste which refuses to solder and may become impossible=
 to
>get off or handle in any way. The only fix I know is to melt a generous am=
ount
>of ultra low temperature solder into it and suck up the mess with solder p=
ump
>and wick until no trace of it is left.

Which may even damage the PCB if not done carefully. Been there, done that.=
 :(

Thanks for the infos.


>
>-- Peter
>
>--=20
>http://www.piclist.com PIC/SX FAQ & list archive
>View/change your membership options at
>http://mailman.mit.edu/mailman/listinfo/piclist

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