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Hi all,</div>
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I've just bought a final 1L bottle of Fox-16, price has doubled since my last bottle in 2020 (unsure how much of that is a Brexit surcharge...). As we all know, actually communicating with Dow /
<a href="https://www.dupont.com/electronic-materials/spin-on-dielectrics.html" data-auth="NotApplicable" title="https://www.dupont.com/electronic-materials/spin-on-dielectrics.html" data-loopstyle="link" id="LPlnk850949">
DuPont</a> is basically impossible. I've bought through Univar and Ellsworth in the past. This time, Ellsworth confirmed what we heard at MAEBL 22:</div>
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1 litre is the only available size and the product will be obsolete:</p>
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The effective date of the product discontinuation will be July 1, 2023, with final orders</p>
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being accepted through May 1, 2023.</p>
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So it seems like the end of the road for 16% HSQ solutions we can freeze with ease. It's been a happy 3 years since I followed Mike's instructions on storage in LN2[<a href="https://mtl.mit.edu/pipermail/labnetwork/2019-April/003616.html" title="https://mtl.mit.edu/pipermail/labnetwork/2019-April/003616.html" data-loopstyle="link" id="LPlnk450101">1</a>][<a href="https://www.researchgate.net/publication/273140774_Storing_HSQ_in_liquid_nitrogen" title="https://www.researchgate.net/publication/273140774_Storing_HSQ_in_liquid_nitrogen" data-loopstyle="link" id="LPlnk876424">2</a>].
A big dewar cost me <a href="https://www.coleparmer.co.uk/i/worthington-35hcb-11m-cryogenic-storage-dewar-system-35-l-10-canisters/0377941" title="https://www.coleparmer.co.uk/i/worthington-35hcb-11m-cryogenic-storage-dewar-system-35-l-10-canisters/0377941" data-loopstyle="link" id="LPlnk469008">
£2.5k</a> or so and it's paid for itself. We freeze in 8ml bottles and put a new one out every week/two in the 4C fridge. This bottle should last us another couple of years.</div>
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<span style="color:rgb(0,0,0); font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt"><b></b><b></b><b>***update</b>***</span></div>
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<span style="color:rgb(0,0,0); font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">While writing this message I emailed Ellsworth again and they sent the following memo from DuPont:</span></div>
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<span style="margin:0px" class="ContentPasted1">UPDATE 11/11/22</span></p>
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<span style="margin:0px" class="ContentPasted1">To support and hearing our customers concerns DuPont APT intends to maintain FOx and XR-1541 series supply beyond July 1st, 2023, until 2025.However, potential supply risk still remains. Production hardware safety
plus capability assessment to maintain high quality resin manufacturing and the final product is still in progress.</span></p>
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<span style="color:rgb(0,0,0); font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">The cliff edge on Fox/XR-1541 has been pushed back for now, expect the prices to continue increasing though!</span></div>
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<span style="color:rgb(0,0,0); font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">Best wishes</span></div>
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<span style="color:rgb(0,0,0); font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">Paul</span></div>
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<font style=""><span class="sig" style="font-size:13px">--<br>
</span><font size="1" style="">Dr Paul Reynolds</font></font></font></div>
<div style=""><font color="#999999" size="1" face="Verdana">Electron Beam Lithography Engineer</font></div>
<div style=""><font color="#999999" size="1" face="Verdana">James Watt Nanofabrication Centre</font></div>
<div style=""><font color="#999999" size="1" face="Verdana">University of Glasgow</font></div>
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<div style=""><font color="#999999" size="1" face="Verdana">Working pattern: Mon,Wed,Thu,Fri 0800-1745</font></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> labnetwork <labnetwork-bounces@mtl.mit.edu> on behalf of Michael Rooks <michael.rooks@yale.edu><br>
<b>Sent:</b> 15 February 2023 21:34<br>
<b>To:</b> Matt Moneck <mmoneck@andrew.cmu.edu><br>
<b>Cc:</b> labnetwork <labnetwork@mtl.mit.edu><br>
<b>Subject:</b> Re: [labnetwork] HSQ Availability</font>
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<div dir="ltr">We are now buying HSQ from <a href="https://discheminc.com/" data-auth="NotApplicable" data-loopstyle="link">
Dischem</a>, in Pennsylvania. Dischem and EMresist buy HSQ powder from AQM in Canada, and then mix it in MIBK.
<div>The resolution and sensitivity are similar to that of HSQ from Dow, but we found that the Dischem HSQ sticks better if we bake it at 120C after spinning.</div>
<div>Prices for thin HSQ are high, but manageable. Prices for thick HSQ (like Dow's Fox-16) are prohibitively expensive. We will have to rework our processes when we run out. We store HSQ in liquid nitrogen, so shelf life is not an issue. You can also buy HSQ
powder directly from AQM.</div>
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<div><font size="1">Michael Rooks</font></div>
<div><font size="1"><a href="http://nano.yale.edu" data-auth="NotApplicable" data-loopstyle="link">nano.yale.edu</a></font> </div>
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<div dir="ltr" class="x_gmail_attr">On Wed, Feb 15, 2023 at 3:59 PM Matt Moneck <<a href="mailto:mmoneck@andrew.cmu.edu" data-auth="NotApplicable" data-loopstyle="link">mmoneck@andrew.cmu.edu</a>> wrote:<br>
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<p class="x_MsoNormal" style="margin-top: 0px; margin-bottom: 0px;">Hi All,</p>
<p class="x_MsoNormal" style="margin-top: 0px; margin-bottom: 0px;"><u></u> <u></u></p>
<p class="x_MsoNormal" style="margin-top: 0px; margin-bottom: 0px;">I would like to solicit your feedback on HSQ options for ebeam litho. Our group has traditionally worked with Dow Corning’s XR-1541-002 HSQ, and it has fit our needs for many years. However,
as our stock is now reaching a reorder point, we have reached out to vendors for quotes only to find that pricing has increased to a level we could have never imagined (not to mention lead times on the order of 80 business days). With that in mind, we have
been looking at alternative suppliers, including EM Resist (distributed through Integrated Micro Materials) and Allresist (Medusa 82).
</p>
<p class="x_MsoNormal" style="margin-top: 0px; margin-bottom: 0px;"><u></u> <u></u></p>
<p class="x_MsoNormal" style="margin-top: 0px; margin-bottom: 0px;">If anyone has experience working with the EM Resist and Allresist products, we would appreciate any feedback you might you might have on how they compare to the XR-1541. For example, do you
see any major differences in resolution, adhesion, dosing, etch resistance, etc.?
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<p class="x_MsoNormal" style="margin-top: 0px; margin-bottom: 0px;"><u></u> <u></u></p>
<p class="x_MsoNormal" style="margin-top: 0px; margin-bottom: 0px;">If you have other alternatives, we would love to hear about them as well, although, we do prefer to buy pre-mixed solutions as opposed to mixing dry HSQ with MIBK ourselves.
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<p class="x_MsoNormal" style="margin-top: 0px; margin-bottom: 0px;">Best Regards,</p>
<p class="x_MsoNormal" style="margin-top: 0px; margin-bottom: 0px;"><br>
Matt</p>
<p class="x_MsoNormal" style="margin-top: 0px; margin-bottom: 0px;"><u></u> <u></u></p>
<p class="x_MsoNormal" style="margin-top: 0px; margin-bottom: 0px;">--<br>
Matthew T. Moneck, Ph.D<br>
Executive Director, Claire & John Bertucci Nanotechnology Laboratory<br>
Electrical & Computer Engineering | Carnegie Mellon University<br>
5000 Forbes Avenue, Pittsburgh, PA 15213-3890<br>
Phone: 412-268-5430<br>
<a href="http://ece.cmu.edu" data-auth="NotApplicable" data-loopstyle="link">ece.cmu.edu</a>
<br>
<a href="http://nanofab.ece.cmu.edu" data-auth="NotApplicable" data-loopstyle="link">nanofab.ece.cmu.edu</a>
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