[labnetwork] Thoughts about sunlight entering cleanroom

[Hollingshead, Dave]

We have a full bank of windows on the outside wall of our hallway/user storage area. The litho bay segment is protected by yellow film.

-Dave
Dave Hollingshead
Manager, Research Operations

The Ohio State University
Nanotech West Labs
Suite 100, 1381 Kinnear Rd, Columbus, OH 43212
614.292.1355 Office
hollingshead.19 at osu.edu<mailto:hollingshead.19 at osu.edu> / nanotech.osu.edu<http://nanotech.osu.edu>

Pronouns: he/him/his



From: labnetwork <labnetwork-bounces at mtl.mit.edu> On Behalf Of Matthias Pleil
Sent: Wednesday, February 22, 2023 17:32
To: Joseph Losby <joseph.losby at ucalgary.ca>; labnetwork at mtl.mit.edu
Subject: Re: [labnetwork] Thoughts about sunlight entering cleanroom

You can apply yellow film to the windows to filter the outside light. Having windows does a lot for your folks. Kind Regards, Matthias Pleil, Ph. D. Director Manufacturing Engineering Program UNM MTTC Cleanroom Manager Research Professor &

You can apply yellow film to the windows to filter the outside light.  Having windows does a lot for your folks.


Kind Regards,

Matthias Pleil, Ph.D.
Director Manufacturing Engineering Program
UNM MTTC Cleanroom Manager
Research Professor & Senior Lecturer III of Mech. Eng - UNM
PI - Support Center for Microsystems Education
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________________________________
From: labnetwork <labnetwork-bounces at mtl.mit.edu<mailto:labnetwork-bounces at mtl.mit.edu>> on behalf of Joseph Losby <joseph.losby at ucalgary.ca<mailto:joseph.losby at ucalgary.ca>>
Sent: Wednesday, February 22, 2023 11:04 AM
To: labnetwork at mtl.mit.edu<mailto:labnetwork at mtl.mit.edu> <labnetwork at mtl.mit.edu<mailto:labnetwork at mtl.mit.edu>>
Subject: [labnetwork] Thoughts about sunlight entering cleanroom

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  [EXTERNAL]
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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