[labnetwork] Gold Deposition over Chrome

[Jim Carroll]

Thanks Richard for the suggestion.  Initially we have been targeting a film
thickness of 100nm, approximately the same as the chrome stack (90nm Cr,
10nm Cr203), but may try thinner.

Thanks,
Jim Carroll
*PhotomaskPORTAL*
*We help you make masks*
(415) 448-6275

   -
   <http://www.photomaskportal.com>



On Fri, May 31, 2019 at 5:40 AM Morrison, Richard H., Jr <
rmorrison at draper.com> wrote:

> Here’s a crazy idea try vapor HMDS, it will react with the glass but not
> the Chrome and it might help. Gold does not really like to stick to glass
> how thick is the film?
>
>
>
> Rick
>
>
>
>
>
>
>
> *From:* labnetwork-bounces at mtl.mit.edu [mailto:
> labnetwork-bounces at mtl.mit.edu] *On Behalf Of *Jim Carroll
> *Sent:* Thursday, May 30, 2019 4:24 PM
> *To:* labnetwork at mtl.mit.edu
> *Subject:* [labnetwork] Gold Deposition over Chrome
>
>
>
> Dear LabNetwork colleagues,
>
>
>
> We are trying to add a thin film of gold over patterned chrome on a
> standard photomask using e-beam evaporation.  We want the gold to
> preferentially adhere to the chrome while lifting off the glass.
>
>
> After a few tests, it appears that the gold sticks equally well to both
> the glass and chrome.  Ultrasonic agitation and swabbing do not selectively
> remove the gold from the glass while leaving it on the chrome.  Eventually,
> after enough pressure is applied with a swab, the gold releases from both
> the glass and chrome.
>
>
>
> Does anyone have a suggested approach?
>
>
> Thanks,
>
> Jim Carroll
> *PhotomaskPORTAL*
>
> *We help you make masks*
> (415) 448-6275
>
> ·         [image: Image removed by sender.]
> <http://www.photomaskportal.com>
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