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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> labnetwork <labnetwork-bounces@mtl.mit.edu> on behalf of Joseph Losby <joseph.losby@ucalgary.ca><br>
<b>Sent:</b> Wednesday, February 22, 2023 11:04 AM<br>
<b>To:</b> labnetwork@mtl.mit.edu <labnetwork@mtl.mit.edu><br>
<b>Subject:</b> [labnetwork] Thoughts about sunlight entering cleanroom</font>
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<p class="x_MsoNormal" style="line-height:12.0pt; background:#FF6666"><b><span style="font-size:10.0pt; color:white"> [EXTERNAL]</span></p>
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Hello, in the planning of our new facility the architects have placed windows along a side of the cleanroom (which is fine). Outside of the windows is a hallway which is lined with large windows to the outside. This would allow for sunlight to pass through
two sets of windows and into the cleanroom. <span style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">Although standard windows are adequate for filtering a majority of shorter wavelength UV, some of the longer wavelength UV (UV-A, ~300-400
nm) will still transmit. It is of my belief that it's standard practice not to have sunlight entering the cleanroom (especially a litho area). </span></div>
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Are any of your cleanrooms exposed to sunlight (I haven't seen any) and, if so, what type of window filtering do you use?</div>
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Cheers,</div>
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<span style="font-family:Arial,Helvetica,sans-serif; font-size:10pt; color:rgb(102,102,102)">Joseph Losby, PhD.</span></div>
<div style="color:rgb(0,0,0)"><font face="Arial, Helvetica, sans-serif"><span style="font-size:13.3333px; color:rgb(102,102,102)">Operations Manager, qLab</span></font></div>
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