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<p class="MsoNormal"><span style="font-size:11.0pt">Zhichao,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> We test for the effect of the HMDS because sometimes a year is too long. We use a Goniometer to measure the effectiveness of the hydrophobic surface. By measuring the angle of the face of a water drop
you can tell if the surface is hydrophobic or hydrophilic.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">When we lose the hydrophobic angle we change the HMDS.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Bruce Tolleson<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">RIT SMFL<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> labnetwork <labnetwork-bounces@mtl.mit.edu>
<b>On Behalf Of </b>Zhichao Wang<br>
<b>Sent:</b> Monday, April 8, 2024 5:40 PM<br>
<b>To:</b> labnetwork@mtl.mit.edu<br>
<b>Subject:</b> [labnetwork] HMDS lifetime in YES oven<o:p></o:p></span></p>
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<p class="MsoNormal">Dear Lab Network, <o:p></o:p></p>
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I was wondering how long the lifetime is for the HMDS in the YES oven. On the note from the YES's website, it says " If the HMDS is more than a year old, it should probably be replaced". I would assume the "year" here starts from the HMDS manufactured date,
which is the shelf life for a brand new bottle of HMDS. Do you guys have experience on using the HMDS for extended time (like 6+ months) after the expiration date? Please let me know your thoughts and suggestions. Many thanks!<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Best,<o:p></o:p></p>
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<p class="MsoNormal">Chao<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span class="gmailsignatureprefix">-- </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="color:#0B5394"><img width="96" height="95" style="width:1.0in;height:.9895in" id="_x0000_i1025" src="https://ci3.googleusercontent.com/mail-sig/AIorK4x_Y6s1D-QRl-0PHmw-IKysmBp1Gr83JeY3kMWLc6K2VhCqyd-PX_9Jh3QjaDEpSxLygmnUyHk"></span><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:13.5pt;font-family:"Courier New";color:#0B5394">Zhichao "Chao" Wang, Ph.D.</span></b><o:p></o:p></p>
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<p class="MsoNormal"><i><span style="font-family:"Trebuchet MS",sans-serif;color:#0B5394">Lithography Engineer</span></i><o:p></o:p></p>
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<p class="MsoNormal"><i><span style="font-family:"Trebuchet MS",sans-serif;color:#0B5394">UDNF</span></i><o:p></o:p></p>
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<p class="MsoNormal"><i><span style="font-family:"Trebuchet MS",sans-serif;color:#0B5394">University of Delaware</span></i><o:p></o:p></p>
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<p class="MsoNormal"><i><span style="font-family:"Trebuchet MS",sans-serif;color:#0B5394">Pronouns: He/Him/His</span></i><o:p></o:p></p>
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<p class="MsoNormal"><i><span style="font-size:9.0pt;font-family:"Trebuchet MS",sans-serif;color:#0B5394">------------------------</span></i><o:p></o:p></p>
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<p class="MsoNormal"><i><span style="font-family:"Trebuchet MS",sans-serif;color:#0B5394">Office Number</span></i><i><span style="font-family:"MS Gothic";color:#0B5394">：</span></i><i><span style="font-family:"Trebuchet MS",sans-serif;color:#0B5394">(302) 831-4839</span></i><o:p></o:p></p>
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<p class="MsoNormal"><i><span style="font-family:"Trebuchet MS",sans-serif;color:#0B5394">221 Academy St.</span></i><i><span style="font-family:"MS Gothic";color:#0B5394">，</span></i><i><span style="font-family:"Trebuchet MS",sans-serif;color:#0B5394">RM170</span></i><o:p></o:p></p>
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<p class="MsoNormal"><i><span style="font-family:"Trebuchet MS",sans-serif;color:#0B5394">Newark, DE 19711</span></i><o:p></o:p></p>
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