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<p>Dear Labnetworks community,<br>
</p>
<p>I'm in the process of renovating our cleanroom and want yellow
filters that meet the specs of <i>Lithoprotect</i>, specifically,
I want way less than 1% transmission below 500nm. <i>Lithoprotect</i>
(see link below) claims less than 0.001% transmission below about
475nm. In our old cleanroom, we used to have traditional 1%
yellow windows that turned out to be inadequate for our maskless
lithography system.<br>
</p>
<p><a moz-do-not-send="true"
href="https://www.microchemicals.com/technical_information/170823_Lithoprotect_Flyer_EN_Web.pdf">https://www.microchemicals.com/technical_information/170823_Lithoprotect_Flyer_EN_Web.pdf</a></p>
<p>Does anyone know of a US supplier that offers similar product?
On the other hand, does anyone know of products that are not quite
as performing but still offer say 0.01% transmission below 500nm?
We will be using 405nm and 365nm light with a traditional mask
aligner and a maskless system. We typically use AZ 5214E-IR and
nLoF 2020 resists for down to 1um features; some users still use
Shipley 1813 and we have another set of groups using SU-8
resists. We're not committed to any supplier but do require tight
performance.<br>
</p>
<p>I'm cc'ing our cleanroom manufacturer engineers in this thread.</p>
<p>Regards,</p>
<p>Mario<br>
</p>
<div class="moz-signature">-- <br>
<img src="cid:part2.D7DA05D4.832AB8E2@physics.ubc.ca" border="0"></div>
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