[labnetwork] Etching WO3

[Darick Baker]

Hello Mario,

Do you know how the WO3 is attached to the copper? You might be able to
melt the solder or dissolve the epoxy that is holding the pieces together.
That may be more pleasant than trying to etch the WO3.
Good luck.

On Fri, Mar 14, 2025 at 4:39 PM Beaudoin, Mario <beaudoin at physics.ubc.ca>
wrote:

> Dear Network,
>
> I have a big copper sputter target holder on which a WO3 (tungsten
> tri-oxide) target on it.  I'd like to etch away the WO3 and keep the
> copper.  Anyone can recommend some appropriate wet chemistry?
>
> Best
>
> Mario
> --
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-- 
Darick Baker, PhD
Manager, Engineering and Business Development
Washington Nanofabrication Facility (WNF)
University of Washington
Fluke Hall 115, Box 352143
Desk: 206.221.8265 Cell: 206.395.4049 (text preferred)
https://www.wnf.washington.edu/
Pronouns: he/him
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