[labnetwork] [EXTERNAL] Thoughts about sunlight entering cleanroom

[Morrison, Richard H., Jr]

This is Rick Morrison from Draper, when we built our fab we have windows that let in sunlight to a clean corridor, on the Litho doors we used a yellow filter film attenuated the Sunlight.



Check this site out, good product



Rick



Richard Morrison

DMTS

Draper Laboratory

555 Technology Square

Cambridge Ma  02139

Office: 617-258-3420

Cell: 508-930-3461









From: labnetwork <labnetwork-bounces at mtl.mit.edu> On Behalf Of Joseph Losby
Sent: Wednesday, February 22, 2023 1:04 PM
To: labnetwork at mtl.mit.edu
Subject: [EXTERNAL] [labnetwork] Thoughts about sunlight entering cleanroom



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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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