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<p class="MsoNormal">Jim – How are you patterning the chrome? I would suspect that you have a thin layer of chrome in the “blanked” areas.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="color:black">___________________________________________________<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Felix P. Lu, Ph.D.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:black">Director of Corporate Engagement<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#C00000">Institute for Molecular Engineering<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">The University of Chicago<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Eckhardt Research Center<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">5640 S. Ellis Ave., Room ACC104<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Chicago, IL 60637<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">773.834.5063 office<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><a href="mailto:fplu@uchicago.edu"><span style="color:#0563C1">fplu@uchicago.edu</span></a> |
<a href="http://ime.uchicago.edu/"><span style="color:#0563C1">ime.uchicago.edu</span></a></span><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black"><labnetwork-bounces@mtl.mit.edu> on behalf of Jim Carroll <jim@photomaskportal.com><br>
<b>Date: </b>Thursday, May 30, 2019 at 6:45 PM<br>
<b>To: </b>"labnetwork@mtl.mit.edu" <labnetwork@mtl.mit.edu><br>
<b>Subject: </b>[labnetwork] Gold Deposition over Chrome<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif;color:black">Dear LabNetwork colleagues,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif;color:black">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.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif;color:black"><br>
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. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif;color:black">Does anyone have a suggested approach?<br>
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Thanks,</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Jim Carroll<br>
<b>PhotomaskPORTAL</b></span><o:p></o:p></p>
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<p class="MsoNormal"><i><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">We help you make masks</span></i><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"><br>
(415) 448-6275</span><o:p></o:p></p>
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