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Melting points: Solder Paste v.s Tin-Lead vs. RoHS vs. low temperature solders
Posted by: Trash80toHP_Mini on 2018-04-03 11:34:16
trag and I were discussing a notion I had for doing double sided SMT fabrication quite a while back. IIRC it was for SIMM fabrication and the melting point differential was great enough to make it workable? I'm curious now about finding a minimum of three solder types with workable melting point differentials. Among other things, this would enable reworking QFP CPU pads with an adapter plate allowing for a different (smaller) footprint CPU in a different package to be substituted.

Suggestions for implementing a more flexible stepped re-work process?

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