[BNC-all] BNC News: Week of November 28th
Abrol, Sangeeta Saddul
abrols at purdue.edu
Mon Nov 28 12:38:56 EST 2022
Seminars /Workshops / Events / Announcement
Announcement
Winter Recess Announcement:
On behalf of the Birck Leadership Team…….
Dear Birck Research Community,
The Purdue winter recess begins Friday December 23rd and concludes Tuesday morning, January 3. The university is officially closed during this time. As we have done in past years, the Birck Nanotechnology Center will remain available for research but will be unstaffed and hazardous gasses will be unavailable. Following is a description of the Birck center during this period of university closure:
1. All labs and cleanroom will be open.
2. All hazardous gases will be unavailable.
3. HF, BOE, and TMAH chemical processing will be allowed as long as a trained buddy is present.
4. Precursors for ALD systems will be available.
5. No shipping or receiving is being done at any building on campus.
6. The custodians will not be working so restrooms will not be maintained and waste/trash will not be removed.
o We encourage users to keep the facility clean and be extra vigilant about the hygiene.
7. A few engineering and building staff may walk through occasionally for major issues but availability will be very limited.
o Faculty and senior researchers are encouraged to be more proactive (e.g. occasional walk throughs checking the labs where there is ongoing research). Email Birck management if you notice anything.
Since there will be limited staff support during this winter recess the research groups are strongly encouraged to accomplish as much processing as possible before gases are turned off on Dec. 22.
See the following for more detailed information (this will be up on the BNC Wiki):
2021-12-23 to 2022-01-03: Reduced Holiday Operations
Due to Purdue’s Winter Recess hazardous gases will be unavailable from 3:30 PM Thursday, December 22 until 8:00 AM on Tuesday, Jan 3rd. Lab work may otherwise proceed, though any fume hood work must be done with someone else present in the same laboratory or cleanroom bay (the “buddy” system). Please note the following changes to our normal operation:
o ALD sources will remain available
§ Unavailable gases:
· Ammonia (NH3)
· Boron trichloride (BCl3)
· Chlorine (Cl2)
· Dichlorosilane (H2Cl2Si)
· Hydrogen (H2)
· Hydrogen Sulfide (H2S)
· Krypton Fluoride (KrF)
· Methane (CH4)
· Nitric Oxide (NO)
· Silane (SiH4)
· Trichlorosilane (HCl3Si)
§ Tools affected:
· Reduced capability:
o PVD Nitride Sputtering System (NH3 unavailable)
o Tube 1 Clean Ox (H2 unavailable, dry oxidation only)
o Tube 4 Field OX (H2 unavailable, dry oxidation only)
o Tube 7 General Oxidation (H2 unavailable, dry oxidation only)
o Panasonic (Cl2 and BCl3 unavailable)
o Plasma-Therm Apex SLR ICP RIE Etcher (H2, Cl2 and BCl3 unavailable)
· Shutdown:
o Axic PECVD (NH3 & SiH4 unavailable)
o Easy Tube 3000 DVD (CH4 unavailable)
o Epigress (SiH4 unavailable)
o H2S CVD (H2S & H2 unavailable)
o Nitric Oxide Anneal (NO unavailable)
o Plasma-Therm Apex SLR HDPCVD (SiH4 unavailable)
o Tube 2 Nitride (NH3 and HCl3Si unavailable)
o Tube 3 LTO (SiH4 unavailable)
o Tube 6 Polysilicon (SiH4 unavailable)
· Work with highly dermally toxic materials (25% TMAH, BOE, HF) ABSOLUTELY requires a buddy within eyesight at all times.
· Custodial staff will not be working.
· There will be limited restocking of shared use supplies.
· There will be limited availability of engineering staff to answer questions or repair down equipment.
o On metallization tools sources will not be changed and depositions must be < 200 nm.
Contact Steve Jurss (sejurss at purdue.edu<mailto:sejurss at purdue.edu>) with any questions.
Attention to all sputtering users:
In early June of this year, we removed all access to the sputtering tools in the cleanroom due to lengthy lead times in obtaining replacement parts, as a precaution to help maintain the up-time of the tools. As we have received the appropriate assortment of parts to perform maintenance on the tools as issues arise, we have decided to start opening up the tools to users once again. Starting Monday, October 31st, the Metal/Dielectric sputter tool only will be once again available for training and use. Since it’s been almost 5 months since anyone has used the tool, we have changed trained users’ access level to “Preliminary.” When you want to use the tool, make a reservation during business hours (8AM to 5PM, Monday through Friday), and we will coordinate such that your first deposition will be supervised by a staff member, to act as a refresher training after not using the tool for so long. Then, once it’s deemed appropriate to do so, users’ access will be restored to the normal level. Please contact Dave Lubelski and Dan Witter for questions and coordinating training and usage, and please check the tool’s wiki page for updated material availability and compatibility. If the desired material isn’t installed, please let us know ahead of time so we can appropriately prepare the system.
Dan Witter
Dangerous Chemical Exposure Issue
It has been brought to our attention that user(s) have been working in the cleanroom without proper PPE. This may result in a serious injury!
You are required to wear the listed PPE when using an acid hood.
[cid:image009.png at 01D90315.10200230]
[http://t0.gstatic.com/images?q=tbn:ANd9GcSJ8B8Hz8N3Ds6EKvq_wLZ8GHuCSR1cl77CAeLJODXMk2nDVYK9][49_252.jpg][Crews Headgear With Faceshield]<http://www.safetyglassesusa.com/crewsheadgear.html>
[clean room critical environment apparel][Emergency Safety Goggles]
+ + + +
Required when using HF, BOE
or anything containing TMAH
Failure to follow proper procedures will result in loss of access to facilities!
Stephen Jurss
Birck safety Manager
Chemical Use at Birck
Dear All –
We recently had an incident where H2O2 was stored on the BOE shelf in a chemical storage cabinet in the cleanroom. The next user retrieved the H2O2 thinking it was BOE, and got a much different outcome from his etch. So two reminders to our research community:
A. Please store chemicals in the proper, labeled locations in our chemical storage cabinets.
B. Double-check the labels on chemical bottles prior to using them in your process.
Thanks,
Ron
Dear Birck Research Community,
Recently we had an air handling situation whereby the heat and humidity in one of our lab wings was elevated due to an air handler being off-line for repair. With the high heat and humidity in the lab wing it was necessary to open doors to the affected labs to try to promote some level of cooling from the hallway. The air handler issue was fixed within a couple of days and the A/C returned to normal in the labs.
As a reminder, propping doors open is strictly against our policy under all normal conditions. Additionally, entering a lab without swiping in with your own card is also strictly against our policies. We rely on our card-swipe and equipment-use income to support and fund our operation. Anyone who enters a lab without swiping their card, or who enters a lab using someone else’s card, or who knocks on a lab door and is admitted by someone already in the lab is falsifying use of the lab. This will lead to disciplinary action up to and including dismissal from the university. Please use your cards responsibly in our research facility.
Birck Management
Buffered Oxide Etch Concentration Change
We were notified by our BOE supplier, VWR, that they are discontinuing their 6:1 solution but will continue stocking & selling the 5:1 solution. We have two cases left of the 6:1 but will start ordering the 5:1 for future use at Birck. Please note the etch rate change per this comparison table:
[cid:image004.png at 01D8B3BF.33698B30]
Safety:
Dear Birck Users,
Birck and Bindley are moving to an ANSI-compliant safety glasses policy in our labs. What this means is that prescription glasses that aren’t ANSI Z87.1 compliant will no longer be allowed for work in Birck labs or the cleanroom. Either ANSI-compliant safety glasses currently supplied to labs or ANSI-compliant prescription glasses are required to be worn to enter the laboratory. Verbal warnings will be issued to non-compliant users until September 1, 2022 after which more formal action will be taken.
Stephen Jurss
Birck Safety Manager
Dear Birck Users:
In an effort to comply with university policy and OSHA regulation Birck is making access to Safety Data Sheets available via QR codes located on the laboratory hoods.
Please be aware we are removing hardcopy binders from various locations throughout the facility. Please note: SDS’s will still be required with all chemical orders.
[cid:image004.png at 01D85359.518DEC80]
Stephen Jurss
Birck Safety Manger
Birck Events<https://www.purdue.edu/discoverypark/birck/events/index.php> and Birck News<https://www.purdue.edu/discoverypark/birck/news/index.php>
https://www.nature.com/articles/s41598-022-19051-5
This is a Hosseini-Shakouri collaboration studying the role of instability and correlation in nonlinear optical systems subject to feedback. The multimode correlation observed can be used to develop better imaging systems, potentially beyond classical boundaries.
Best,
Mahdi Hosseini, PhD
Assistant Professor, Elmore Family School of Electrical and Computer Engineering,
Assistant Professor, Physics and Astronomy (by Courtesy),
Birck Nanotechnology Center, BRK 2274
[cid:image044.jpg at 01D90315.10200230]NSAC President : Alex Ozbolt (aozbolt at purdue.edu<mailto:aozbolt at purdue.edu>) or nsac at purdue.edu<mailto:nsac at purdue.edu>
NSAC Fab Forum
Tuesday @ 3.30pm
NSAC Coffee Hour
Friday @ 3.30pm
Birck Nanotechnology Center Advanced Capabilities
MPMS-3 SQUID Magnetometer
Capabilities: Magnetic Properties Measurements
Sensitive, quantitative measurement of magnetic moment
Wide temperature range (T = 1.8 K - 1000 K) and field range (up to B = 7 tesla)
Also measure magnetic dynamics with AC susceptibility
[https://www.purdue.edu/discoverypark/birck/facilities/equipment/images/MPMS3.jpg]<https://wiki.itap.purdue.edu/display/BNCWiki/Quantum+Design+MPMS-3+SQUID+Magnetometer>
Other Capabilities: Electrical measurements or voltage biasing while measuring magnetic moment
Location: BRK 1157A
Contact: Neil Dilley (ndilley at purdue.edu<mailto:ndilley at purdue.edu>)
Please visit the Birck Wiki to learn about the wide array of fabrication and characterization equipment at the facility<https://wiki.itap.purdue.edu/display/BNCWiki/>
***To post an announcement in the weekly BNC E-news please send to Sangeeta Abrol @ abrols at purdue.edu***<mailto:abrols at purdue.edu***>
Follow us on Facebook and Twitter
[Facebook icon]<https://www.facebook.com/nano.purdue.edu/> [Twitter icon] <https://twitter.com/BNCPurdue>
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