Difference between revisions of "Frequently Asked Questions"

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=== Publications acknowledging the Nanofab ===
=== Publications acknowledging the Nanofab ===
If you publish on devices or work done using the NanoFab, please add an acknowledgement or line of text stating the following (or similar):<blockquote>''A portion of this work was performed in the UCSB Nanofabrication Facility, an open access laboratory.''</blockquote>
If you publish on devices or work done using the NanoFab, you are required to add an acknowledgement or line of text stating the following (or similar):<blockquote>''A portion of this work was performed in the UCSB Nanofabrication Facility, an open access laboratory.''</blockquote>This is important for the continued success of the Nanofabrication Facility.
=== Wifi Access in the Nanofab ===
=== Wifi Access in the Nanofab ===

Revision as of 12:06, 28 May 2019

General NanoFab Questions

Who do I contact for an equipment or general NanoFab problem?

For general Nanofab issues, please contact Tom Reynolds, cell phone: (805) 451-3979

It's much better to let us know of a mistake or problem proactively, and let us help you fix it!


For immediate or health-related emergencies, call 9-911 from any of the phones in the lab, or 911 from your cell phone. Let them know that you are in "Engineering Sciences Building #225" at "Room #1102 - Gowning Room".

Specific Equipment Problem

If you are having trouble with a piece of equipment, please contact the supervisor of that tool first. The supervisor's contact information can be found posted on the walls above/behind the equipment, or on the tool page.

If you need immediate assistance during business hours, you may call the tool supervisor's cell phone number, otherwise use their office phone or email.

If the engineer is not available, please email the NanoFab Staff at NanoFab@ece.ucsb.edu. This emails all staff, so anyone available can help.

Always notify maintainers immediately of any unusual problem that may affect other users, and also record it in the logbook! If a tool is down, please place a note at the tool and notify users that have upcoming reservations.

Contact all NanoFab Staff by Email

The entire NanoFab staff can be emailed at NanoFab@ece.ucsb.edu. This allows any staff member who is able to help to respond in a timely manner. Any problem for which you are unsure who to contact, send it to this email address.

NanoFab On-Call Staff

For after-hours and weekend emergency situations, please call (805) 451-0509 to contact the staff member that is on-call. This is for major issues/emergencies that will affect many users, such as alarms, leaks, wet bench, fume hood issues etc. Please do not call this number for problems with a single process tool that only affects a few users, instead see above.

Can I add equipment reservations to my phone/computer/online calendar?

Yes, log into SignupMonkey, and on the "Future Reservations" column on the right, click on the "iCalendar" link. This links to a ".ics" file that lists all your upcoming equipment reservations. Open this file to add the reservations to your calendar.

Image showing the iCalendar ".ics" file link on SignupMonkey
The "iCalendar" (.ics) file link on SignupMonkey

Unfortunately deleted reservations will Not be removed from your calendar, because of the difficulty with CalDAV programming. I recommend having a separate calendar that you save your reservations onto.

Programatically Accessing Reservation Data

To get a URL for accessing reservation data using a program, you can simply copy the URL to the *.ics iCal file mentioned above. This URL contains encrypted login info, so returns the *.ics file without requiring the GUI login form.

You can get such a URL of your own future reservations as mentioned above.

You can also get a custom search (for example all the future/past reservations from your research group) from the "Search" section of Signup Monkey. The results page of any search includes a link at the top for the corresponding iCal file - copy that URL to use in your program/scripts.

How do I get my files from the NanoFab computers?

USB ports are disabled on most NanoFab computers to prevent the spread of viruses.

Instead, you can download your files from our SFTP server. As long as you place your files into the proper directory on the tool computer, your files will be synced to the NanoFiles STFP server every hour (or immediately by running the "Sync to NanoFiles" script). You must save into a folder that is named according to your research group/company's name.

Note that the first time you create a folder for your group on a tool, it will take 24hrs for that tool to show up in your SFTP sessions, and thereafter it will sync every hour.

For further information on how to access these files, and where to place your files, please log into SignupMonkey and click the Files > Request Login Credentials link. The email you receive will give you instructions on accessing/syncing to the NanoFiles server, including acceptable folder names you can use on the tool computers.

You can re-send this email any time by clicking the link on SignupMonkey.

I can't connect to the Nanofiles FTP server!

Symptom: Your SFTP client is suddenly unable to connect to the nanofiles server, with an error like "Network Error: Connection Refused". This may also affect other people on the same network as you (who share the same external IP address.)


There are two ways your IP address can be automatically blocked:

  1. You use the wrong password a few times, or
  2. Your FTP program tries to make too many connections, so fast that it looks like a DDOS attack and you get blocked.


Email nanofabadmin and request that you be unblocked. To prevent this going forward, here are some tips:

  1. Save your password on your computer with a password manager.
  2. Many FTP clients have the option to use "multiple connections"/"simultaneous downloads". Set it to use maximum 3 connections (which means that you can Browse the folders while downloading two files).
    1. See these links for limiting the number of connections for Filezilla, WinSCP, CyberDuck.
  3. Your FTP client may also be set to try many "reconnection attempts" very fast. If the saved password is wrong, it will quickly reach the limit of authentication failures, and block your IP. Set your FTP client to never retry on failure, just in case it is due to a bad password.

Publications acknowledging the Nanofab

If you publish on devices or work done using the NanoFab, you are required to add an acknowledgement or line of text stating the following (or similar):

A portion of this work was performed in the UCSB Nanofabrication Facility, an open access laboratory.

This is important for the continued success of the Nanofabrication Facility.

Wifi Access in the Nanofab

The Wifi networks "UCSB Secure" (preferred) and "UCSB Wireless" (will ask for login every time) and "eduroam" (other educational institutions) have full coverage in the NanoFab. All UC students/employees can use their NetID's to access these networks. External institutions can request a login from Brian Thibeault.

Cellular coverage is not very good in some parts of the lab. However, Wifi Calling aka. VoIP works very well if your device is connected to one of the aforementioned networks. You can set your iPhone or Android phones to make voice calls over Wifi, as long as your cellular carrier supports this. Then when you initiate the call from a region you intend to work from, your device should automatically choose Wifi if it has the best coverage. Calling through your computer (eg. online teleconferencing) will also utilize the Wifi network rather than cellular.

"Wifi calling" is often not enabled by default, enable it as follows:

Processing/Fabrication Questions

I need help using a tool, where do I get help?

There are so many little details to remember in the cleanroom, we all sometimes forget something or need a reminder. When in doubt, ask for help!

  • First, check to see if printed instructions are found at the tool itself.
  • Second, check the Wiki page for that tool - many of our instruction sets and user manuals are posted on the Tool page in the Equipment section (see the left side bar).
  • Third, during business hours (eg. 7am-5pm) you can contact the tool maintainer. Contact info is posted on the glass walls above each tool.
  • Fourth (maybe first) option, look for an experienced user in the lab who might be able to help. Our users are typically very collaborative, knowledgeable and helpful! A senior member of your group is always a good option.

Where do I find a recipe for a process (litho/etch/dep etc.)?

The "Recipes and Data" section on the left sidebar lists the different categories of recipes. In those pages, you can see whether a recipe exists for your process, and on which tool. We often include some basic characterization data on the recipes, but you should note that these are approximate only. If you have tight tolerances, you need to characterize the recipe yourself (ie. figure out deposition/etch rate, selectivity, verticality etc.).

For some recipes (etches in particular), we often post the parameter variations/recipe characterizations to show you how different recipe variables affect the etch. If you find that a provided recipe isn't exactly what you need, you can use this information to modify a copy of the recipe to suit your own needs. Please refer to the tool owner for creating your own recipes on each tool, especially for those that have a limited number of saved recipe slots.

Many datasheets provide very usedul process info. For example, the datasheets for lithography photoresists/developers and solvents usually show spin curves (thickness vs. spin speed), exposure dose, bake times, resist profile vs. reflow temp etc.

You can find photolithography datasheets on the Chemical Datasheets section of the Lithography Recipes page.

A recipe is indicated as "A", Available, where do I find info on this recipe?

If a recipe is marked as "A", Available on one of the recipe tables, this usually means that a graduate student has done this process at some point, but the NanoFab hasn't necessarily verified the process nor has the exact recipe and characterization. Contact anyone in the Process Group to get in contact with the research group that developed the recipe.

Wiki Questions

NanoFab users are highly encouraged to contribute their own work, characterizations and corrections to our Wiki! Read on to learn how to do this.

How do I get a login to the wiki?

If you have an active SignupMonkey login, then you can create a Wiki login yourself.

Just click the "Create an Account" link in the corner of the page,

Fill in your info, making sure you use the same email address you use for SignupMonkey.

Then click the link in the confirmation email you receive.

You will then be able to log in and edit many of the wiki pages.

How do I edit a page?

First, you need to login by clicking the “Log In” link in the top-right corner of the page.

Then you simply click [Edit] on a page you wish to change. The [Edit] option will only be available for pages that you are authorized to change, which does not include all pages.

[Edit] brings up the Visual Editor, which allows you to type directly into a page without editing any code, like using a regular word processing program. The Visual Editor is the recommended method. Alternatively, [Edit Source] will show you the wiki markup code for the page, which is also an acceptable way to edit a page but much less intuitive.

Please see the Editing Tutorials for more information on editing a page.

Note that NanoFab users are only allowed to edit certain pages, and have some restrictions on their accounts for security purposes. However we do encourage all updates and changes, so please contact the Wiki Admin if you need help, such as making a new page, uploading images etc. The giant materials/recipe tables are only editable by Admins, so let us know if you have a new recipe/material to add!

"Something went wrong" while saving my edits! How do I keep my edits?

Sometimes the server will log you out after a long time, even while you are still editing a page!

Then when you try to save the page you might get an error like "Something Went Wrong: We could not save your edits because the session is no longer valid...".

If this happens, DO NOT CLOSE your edited page or you may lose your edits! Instead do the following:

  1. Hit "Resume editing" on the edited page, to close the "Save Page" dialogue.
  2. Open a NEW web browser window,
  3. Go to the NanoFab wiki in that new window,
  4. Login to the wiki on that window (you can click the link to go to the Login page directly)
  5. On your edited page, Click "Save Page" again, and after dismissing the error click "Try Again". You may need to press Try Again a few times until it figures out that you have logged in, and it will then save your edits.

What do I do if I find an error on the wiki?

If you locate a mistake, error or typo, log in and make the change yourself. Staff will see your edits and approve them.

If you don't have edit permission, let Demis know about the change you wish to make.

Why aren't my edits showing up?

While lab users are allowed to edit the wiki, all those edits will be approved by a staff member before going live.