[labnetwork] LED lights in photosensitive areas - yellow lens needed?

[Brent Gila]

Hello Frank,

Typical positive resist (example is AZ1500 series) is photosensitive in 
the violet-blue light spectrum and white LEDs have a very strong blue 
emission.  Your best bet is to use the standard amber filters or use a 
single wavelength LED like green or yellow.

Best Regards,
Brent

-- 
Brent P. Gila, PhD.
Director, Nanoscale Research Facility
1041 Center Drive
University of Florida
Gainesville, Florida 32611
Tel:352-273-2245
Fax:352-846-2877
email:bgila at ufl.edu



On 7/7/2017 12:57 PM, Frank Gavin wrote:
>
> Hello everyone
>
> We are suppliers of wet process equipment and one of our vendors of 
> HEPA and ULPA fan/filter units tells us that we do not need to add 
> yellow lens covers over LED light because such lights do not emit 
> ultraviolet light.  I am always suspicious of simple convenient 
> solutions so I want to put this statement out to this learned 
> community and learn if this statement is true.  Perhaps some members 
> have experience using LED lights in photosensitive areas of their fab 
> and would care to comment?
>
> Best Regards,
>
> FRANK GAVIN, Sales Eng.
>
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