On Feb 6, 2008 5:24 PM, Nodes Norbert  wrote:
> Hello Mr. Holmström.
>
> Even after removal with a suitable solvent, a very thin Cytop polymer layer
can remain on top of chrome and inhibit etching.
> You may have to treat the surface with some plasma or ashing process before
chrome etching.

Thank you for your answer. This might very well be the reason. The
only reason not to believe this is that the surface gold could be
etched. But the Cytop might of course stick better to Cr than to Au.

I will try plasma treatment.

/Sven