Bertrand,
It is not clear to me what your questions are?
Do you want to know where there is information regarding recommendations for
soldering such a joint?
Do you want to know about initial solderability testing of components?
Do you want to know about initial solderability testing of boards?

Do you want to talk about soldering ability of a hole with multiple heat
sinking
inner layers?

Susan Mansilla
Technical Director
Robisan Lab

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