[labnetwork] Alternative distributor for SPR 955?

[Howard Northfield]

Yes, I have a jug of SPR955 that is a couple of years past expiry. It has been kept refrigerated and decanted in 300ml amounts (after warming to room temp) for decanting to users ... and is working fine.

Howard
________________________________
From: Demis D. John <demis at ucsb.edu>
Sent: Wednesday, June 21, 2023 6:42 PM
To: Howard Northfield <Howard.Northfield at uottawa.ca>
Cc: Price, Aimee <price.798 at osu.edu>; labnetwork at mtl.mit.edu <labnetwork at mtl.mit.edu>; Ramsey, Keith <ramsey.435 at osu.edu>
Subject: Re: [labnetwork] Alternative distributor for SPR 955?

Attention : courriel externe | external email
We have got the “extension of expiration” notices from manufacturer, and have done internal tests showing these PR’s work well beyond the expiration dates (when bulk is stored in refrigerator) - they appear to be good at least 1 year beyond expiration. We tested UV6, UVN30, and one of the SPR’s if I remember correctly.

-- Demis


On Jun 21, 2023, at 16:07, Howard Northfield <Howard.Northfield at uottawa.ca> wrote:



I am pretty much now used to getting materials only months from expiry from all sources.


Howard Northfield
Research Associate
Advanced Research Complex (ARC)
University of Ottawa
________________________________
From: labnetwork <labnetwork-bounces at mtl.mit.edu> on behalf of Price, Aimee <price.798 at osu.edu>
Sent: Tuesday, June 20, 2023 9:50 PM
To: labnetwork at mtl.mit.edu <labnetwork at mtl.mit.edu>
Cc: Ramsey, Keith <ramsey.435 at osu.edu>
Subject: [labnetwork] Alternative distributor for SPR 955?

Attention : courriel externe | external email

Dear Labnetwork,

Does anyone purchase SPR 955 (or any other Shipley/Dupont products) from a distributor other than Kayaku?  We have had numerous issues with different materials.  In this case, we need to either find a different distributor or begin qualifying another resist, probably both.  The current issue is that we purchased a gallon of SPR955 which was “in stock.”  It arrived last week with an expiration date of 7/8/23.  Kayaku’s response was that they were required to ship what they had on hand first and would ask for an extension to the expiration date from the manufacturer.  I am still hoping for a better response and solution than that but need to find an alternative in the meantime.



If anyone works with a different distributor for Shipley resists, I’d love to hear your experience.  I’ll share the final solution from Kayaku and summarize any responses for alternatives.



Thank you,

Aimee Bross Price



Manager, Nanofabrication

The Ohio State University

Nanotech West Lab

Institute for Materials Research

1381 Kinnear Road

Suite 100

Columbus, OH 43212

614-292-2753

Price.798 at osu.edu<mailto:Price.798 at osu.edu>

Nanotech.osu.edu



Pronouns: she/her/hers





Commercial Chair, 66th International Conference on Electron, Ion, Photon Beam Technology and Nanofabrication (EIPBN)

May 30-June 2, 2023, San Francisco, CA

Conference Chair, 67th International Conference on Electron, Ion, Photon Beam Technology and Nanofabrication (EIPBN)

| https://eipbn.org<https://eipbn.org/> |



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