Correction: I meant ceric ammonium NITRIDE etchant. Which also
contains perchloric acid. That orange stuff, in other words.

m

On 7/20/11, Ned Flanders  wrote:
> If you're using the famous ceric ammonium etchant, the etch rate for
> chromium is rather fast. I never measured it exactly, but 50 nm would
> be etched away in maybe 10-20 seconds at room temp.
>
>
> m