Hi, all 1577 brains (most of them in UK?).
What a noise this will cause, and hopefully one or two answers will bang
into my briefcase.
Now, we bond 100um Al on Cu/Ni/Pd/Au or on Cu/Ni/Au. Different bath
suppliers, different makers. Different schools. Some say 10-12% P will
cause a too hard Nickel, and there will be problems, bond lifts, which
we also get. Delvotec (bond machine maker, good one)make all their ref.
bonding on galvanic nickelplated aluminium plates, and it works fine.

So, electrolytic and pure Nickel is wanted, but the board suppliers
don't love that, because they have to connect every single bond pad on
the FR4 board, on which the rest of pads are made for ordinary SMT
soldering. Anyone who has autobonded on chemnickel (plus Pd/Au or only
Au)? And are you then satisfied?

Ingemar Hernefjord
Ericsson Microwave Systems

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