Al/Au contact

[Arif Sanli Ergun]

Hi labmembers,
Does anyone have experience with Gold to Aluminum contact.
I'm trying to put gold on Aluminum pads for easier wire bonding.
The Aluminum is deposited with gryphon (100 % Al). Then, I do
lift-off lithography and evaporate Ti/Pt/Au. The lift-off goes very well,
but Ti/Pt/Au does not stick to Al very well: it peels off while trying
to wire-bond.  Any ideas why, and how to prevent it?

Sanli