[labnetwork] Thoughts about sunlight entering cleanroom

[Malhotra, Sandra Guy]

At AggieFab at Texas A&M, we have windows along one side of the mobile cleanroom (MCR) units that face a hallway that has windows to the outside. The natural light is quite pleasant. We applied yellow film along the MCR windows for the bay where litho processing is done. We have not experienced any issues.

Sandra G. Malhotra, Ph.D.  |  Technical Lab Manager

AggieFab Nanofabrication Facility
https://aggiefab.tamu.edu/
Department of Electrical & Computer Engineering, College of Engineering | Texas A&M University
3253 TAMU | College Station, TX 77843
ph: 979.845.3199  |  sandra.malhotra at tamu.edu
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TEXAS A&M UNIVERSITY | FEARLESS on Every Front

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From: labnetwork <labnetwork-bounces at mtl.mit.edu> on behalf of Joseph Losby <joseph.losby at ucalgary.ca>
Sent: Wednesday, February 22, 2023 12:04 PM
To: labnetwork at mtl.mit.edu <labnetwork at mtl.mit.edu>
Subject: [labnetwork] Thoughts about sunlight entering cleanroom

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
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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.  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).

Are any of your cleanrooms exposed to sunlight (I haven't seen any) and, if so, what type of window filtering do you use?

Cheers,

Joseph Losby, PhD.
Operations Manager, qLab
Quantum City, University of Calgary
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