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A cleanroom should never have windows to the outside. While using
yellow film to reduce UV from sunlight works, this must periodically
be replaced. Also, the window interferes with the temperature
stability of the environment. <br>
<br>
Your situation may be ok, as you will only need filters. <br>
<br>
Regards,<br>
<br>
Joe<br>
<br>
<div class="moz-cite-prefix">On 2/22/2023 1:04 PM, Joseph Losby
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:YT1PR01MB8715BE1F4D21DE06BE1C7D0F8EAA9@YT1PR01MB8715.CANPRD01.PROD.OUTLOOK.COM">
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<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255,
255, 255);" class="elementToProof">
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>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255,
255, 255);" class="elementToProof">
<span style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt;"><br>
</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255,
255, 255);" class="elementToProof">
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>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255,
255, 255);" class="elementToProof">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255,
255, 255);" class="elementToProof">
Cheers,</div>
<div class="elementToProof">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div id="Signature">
<div>
<div style="font-family: Calibri, Arial, Helvetica,
sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<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>
<div style="font-family: Calibri, Arial, Helvetica,
sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-family: Arial, Helvetica, sans-serif;
font-size: 10pt; color: rgb(102, 102, 102);">Quantum
City, </span><span style="font-family: Arial, Helvetica,
sans-serif; font-size: 10pt; color: rgb(102, 102, 102);">University
of Calgary</span></div>
</div>
</div>
</div>
<br>
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</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Joseph E. Palmer
Chief of Operations for the MNFC
PIM, Princeton University
Contact:
Office: 609-258-4706
Cell: 609-731-8962</pre>
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