Hi,
I intend to pattern a layer of about 10nm of either
 Chromium or Titanium via evaporation and lift-off on 200nm of Gold to etch away
the underlying gold film to create the same pattern as the Chromium or Titanium
patterns.  I understand that there will be an undercut using wet etch
chemistries such as dilute Aqua Regia.  However, I have also read that Chromium
has pinholes.

Has anyone done this process before and any idea how to resolve the pinhole
problem?  Or is Titanium a better film to use?

Jeffrey