Birck Nanotechnology Center BNC 206 -- Cleanroom Training Course - - PowerPoint PPT Presentation

BNC 206 -- Cleanroom Training

Birck Nanotechnology Center

Course Overview

• Introductions
• Cleanroom Specifications
• Cleanroom Safety
• Gowning
• Policies and Equipment Training

The cleanroom of the Birck Nanotechnology Center is an amazing research laboratory. Conforming to ISO Class 3, 4, and 5 standards, particles within the cleanroom are minimized. The cleanroom is 25,252 square feet of space. To keep the level of particle contamination low, we need your

• help. You can minimize the generation of particles within

the cleanroom by understanding and following the procedures and protocols outlined during this training. In order to minimize particle contamination (and increase research quality) within the cleanroom, access is limited to those whose work requires entry. Each user is required to swipe their own Birck badge for access into the cleanroom. Piggy backing on another users card is not allowed. Visitors may not enter the cleanroom, but are welcome to view the operation from the cleanroom tour aisle around the perimeter.

Prior to the actual face-to-face training session, there are a number of prerequisites you must perform. Sean Rinehart is the Birck Staff member administering the BNC206 Cleanroom Training, and needs to ensure you have performed the following prerequisites. Thus, please send the following pieces of information to srinehar@purdue.edu:

• The name of your major professor
• Your Coral Account ID
• Your Career Account ID
• The date you received BNC-105 General Building Orientation
• The date you received BNC-150 Fume Hood Safety Training
• The date you took the BNC-206 online quiz with an 80% passing score.

After sending this information to Sean Rinehart, you may then register for a BNC-206 Cleanroom Training session.

Safety – Evacuating the Cleanroom

While working in the cleanroom, it may become necessary to evacuate the building. When an alarm sounds:

• 1. Leave the cleanroom IMMEDIATELY using the nearest emergency exit.

(There is an emergency exit at the end of every bay of the cleanroom)

• 2. Alert others that there is an emergency, and help them evacuate if necessary.
• 3. Proceed directly to the entrance of the Burton Morgan Center.
• 4. Once you are safely out of Birck and in the Burton Morgan Center, you may remove

your gown. Lorraine Fox will collect all the used gowns and launder them.

Although you will be in your cleanroom gown, leave the cleanroom immediately. Do not take the time to take off your gown. Your safety is more important than the cleanroom gown. You may remove your gown once you are safely in the Burton Morgan Center.

Choose the nearest route out

• f the cleanroom,

then out of the building.

Morgan Housing Housing Housing

Red = emergency exit

State Street Martin Jischke Drive

Emergency routes to Burton Morgan

Burton Center Bindley Nanotechnology Birck

Safety – Chemical Safety

While using hazardous process materials, you must wear the following Personal Protective Equipment (PPE) in addition to your cleanroom garment system. The PPE must be worn when you are working in the zone designated by the striped tape near the acid and solvent hoods. Hoods will be designated with a sign posted inside with its designation (acid or solvent), and the PPE required to work in that hood. There are 20 shower/eyewash stations in the cleanroom. When you are working in the cleanroom, you should take time to locate the nearest station. In the event

• f a chemical exposure, proceed directly to the station and rinse for 15 minutes.

If you have any questions please contact the staff before trying something new.

There are two types of fume hoods in the cleanroom

Acid Hood

• All plastic
• Has a drain

Solvent Hood

• Stainless Steel
• Usually no drain

Safety – Chemical Safety

Safety – Hood Protocols

• Never use acids & solvents in the same fume hood.
• Never dispose of solvents down the drains in the hood.
• Never reach with your hands into chemical solutions.
• Use good chemical hygiene practices.
• Do not work within the first four inches of the hoods, this space is needed for proper airflow.
• Acids are disposed of in acid drains.
• Solvents are captured for disposal.
• Always Add Acid to solutions!
• Work diligently to minimize chemical use. Don't pour 1 liter when 100 mL would be

sufficient.

• Please clean your work area before leaving.
• Solvent soaked wipes-must be dried and disposed of before leaving the cleanroom.
• Acid soaked wipes-Rinse with water, wring out, and throw away before leaving the

cleanroom.

• Beakers may not be left in the hood, anything left in the hood will be disposed of.

Safety – Hood Protocols

Typical fume hood postings are presented in the next pages. Please read them! They will be posted in the back of a hood for your reference. When pouring from the gallon bottle to a beaker, goggles are required. When using any amount of HF acid (or BHF), a face shield is also required.

Safety – Solvent Hood PPE

• You may use either the Ansell Latex Gloves or the thick orange gloves to work in a solvent hood. This is in addition to a

pair of standard cleanroom gloves.

• Clean room suits are fine for solvent protection within the cleanroom. (Thus you do not need an apron, although again

you are welcome to wear one.)

• Eye protection (full eye goggles) still required.
• Never pour solvents down the drain. Place them in labeled waste containers.

Note: I’m still missing my chemical goggles, so I can’t work in the hood yet! Now I’m ready to work in the hood!

Safety – Acid/Base Hood PPE

As in all BNC Acid hoods, if you are inside the hood hazard zone you must wear the following Personal Protective Equipment (PPE):

• Splash resistant goggles
• Apron/Smock
• Orange chemical resistant gloves
• Face shield (when pouring from stock bottles or dealing with large quantities of acid).

Safety – Special Hazards

• Laser Laboratories

– The foremost concern is the danger to one’s eyes and exposed skin. The user must be trained and certified on working the laser and wear the appropriate eyewear protection. – Contact Jerry Shepard jshepar@purdue.edu for instructions

• n how to obtain laser safety training
• Biology Laboratories

– For biological hazards, special training is necessary. – Contact Guy Telesnicki gtelesni@purdue.edu for biological safety training

• X-Ray sources

– Go to: http://www.purdue.edu/rem for training dates/times.

Good Cleanroom Practices

Working in a cleanroom requires patience and diligence. Users must take precautions to minimize contamination caused by their actions. The following are good practices while in the cleanroom:

• Move slowly in the cleanroom.
• Do not restrict the laminar airflow. That is, do not place anything above your sample

such as your head, hands, arms, etc.

• Bathe and change your clothes daily.
• Trim long fingernails to avoid puncturing gloves.
• Wear non-linting street clothes of cotton or polyester blend fabrics.
• As a general rule, once an object enters the cleanroom then it stays in the cleanroom.

The only exception is samples may be carried in and out in a clean container.

• If you need to change your gloves, please return to the gowning room.
• A buddy is required from 5pm to 8am while you are in the cleanroom regardless of

your process.

• Smokers should take a drink of water before entering the cleanroom.

Bad Cleanroom Practices

The following activities generate particles and other contaminants (hurting facility research), and are not allowed in the cleanroom:

• Do not run while in the cleanroom. Brisk walking is also not advisable.
• Do not unzip your cleanroom suit while in the cleanroom.
• Do not open the emergency exits unless during an evacuation.
• Do not bring in non-cleanroom compatible materials (paper, pens, pencils, cardboard)
• Food and drink are not allowed in the cleanroom.
• Chewing gum or sucking mints are not allowed.
• Do not go under the raised floor of the cleanroom.
• Do not prop up your feet on a chair, table, or other raised surface. Feet belong on the

floor.

• If you have a cold, it is advisable to not go in the cleanroom.

Forbidden Items

The following materials and items may not be brought into the cleanroom:

• Laptop computers
• Paper (other than cleanroom paper)
• Research notebooks (other than issued cleanroom notebooks)
• Cosmetics (make up, eye-liner, lipstick, mascara, cologne, perfume, etc)
• Hairspray, hair gel, and other hair styling products
• Old glassware used in other facilities
• Totes, toolboxes, and
• Wedding rings and jewelry is allowed, but rings with prongs or sharp edges should be

avoided.

• Note: Cell phones are now allowed in the cleanroom, but must be carefully wiped

down in the gowning room each and every time prior to entry into the cleanroom.

Materials in the Cleanroom

• Material entry into the cleanroom by a user is limited to samples.
• All samples are to be taken into cleanroom through the gowning room.
• Personal totes may not enter the cleanroom.
• Notebooks must be cleanroom notebooks issued by the BNC Procurement
• Officer. Once a notebook is in the cleanroom, it must stay in the cleanroom or

gowning room. A copier is provided in the gowning room with cleanroom paper.

Common Situations

Taking printed material in:

• Bring printed material into the gowning room for copying onto cleanroom paper.
• Print the material from your office computer to the gowning room printer through the network.

Taking printed material out:

• Frequently, users will want to copy their notes from the process they have completed. The

preferred method is to scan the material to a pdf file on the copy/scanner in the gowning

• room. The file can be saved on a USB flash drive and printed from your office computer.

Cleanroom paper is expensive so please minimize its use.

Storage Within the Cleanroom

Upon request, cleanroom users will be assigned a cleanroom storage bin. New glassware must be purchased and delivered to BNC staff at least 48 hours before its intended use for

• cleaning. Once cleaned it will be placed in the user's storage bin. All glassware and process materials must fit

within your storage container. All items including tweezers must be given to staff for cleaning and placement in your storage container. ALL GLASSWARE MUST BE UNUSED WITH RECEIPT OF PURCHASE WHEN DELIVERED TO STAFF FOR CLEANING. This is to eliminate the possibility of chemical incompatibilities and injury to BNC staff from residual chemicals. Please note, the cleaning done by BNC staff is for particle contamination only. We are not cleaning for your process. Deliver your new glassware to BRK 1220 in a box marked with your name, your professor's name, and your storage bin number. The glassware will be cleaned by the BNC Staff and put in your cleanroom storage container. All sample containers put into the cleanroom basket must be wiped with 10% Isopropyl in 90% ultrapure water before being transferred to the cleanroom basket. Chemicals may only be brought into the cleanroom by BNC staff. Please follow all chemical safety guidelines.

Cleanroom Supplies

Lorraine Fox is able to provide for many of your cleanroom supply needs. You are able to purchase beakers, tweezers, goggles, cleanroom notebooks, and other supplies. Common supplies are stocked in the cleanroom of chem wipes, glass slides, aluminum foil,

• etc. Please help keep the cost down by avoiding excess use. Please do not use 3 chem

wipes when 1 will suffice. Cleanroom supplies are 5 to 10 times more expensive than general laboratory supplies.

• Standard chem wipes are $4.00/box of 100 while cleanroom wipes are $4.00/box of 20.
• Glass slides are $3.20/box of 50 while cleanroom glass slides are $26.00/box of 50.
• Lab coats are $12.00 while a cleanroom suit is $300, and they must be laundered every 5 days!

BNC Supplied Chemicals

• Check under your hood for cleanroom chemicals. Do not open more than one bottle of the same

chemical at a time.

• If you finish a bottle, follow the posted protocol: triple rinse, tag the empty bottle as clean, discard cap,

and place in red bins for disposal.

• If a stock chemical is not currently stored under your hood, transport a new bottle from the supply

cabinets near the lithography bays. (see transport note under safety section)

Gowning

The purpose of gowning is to keep human borne contamination contained within the cleanroom garment. This is accomplished by overlapping layers of the garment

• system. Our garment system starts in the pre-gown area outside the cleanroom

with shoe covers, a bouffant cap, followed by face veil, hood, jumpsuit, boots and cleanroom gloves. Gowns for cleanroom users are orange in color. Gowns can be worn for one week under normal conditions. It is the user’s responsibility to place gowns in the laundering bins. If your gown becomes prematurely or chemically soiled, place it in the laundering bin and select a new one. If your gown is damaged, place it in the repair bin above the printer. Gowns may occasionally be patched to repair tears. If you happen to select a patched gown, please use it. Users found wearing soiled garments will be subject to sanctions.

Gowning

There are two procedures once you have entered the gowning room. The first is for fresh garments, the second for previously worn garments. Fresh Garment Gowning

• 1. Select a hood, face veil, jumpsuit, and boots of the appropriate size.
• 2. Snap the face veil into the hood and pull the hood over your head. Use care to make sure that all hair remains inside the hair cover while

putting the hood on. Adjust the hood with the snaps in the rear to provide a snug but comfortable fit. Pressing the wire in the face veil will ensure a snug fit and help prevent fogging.

• 3. Put on the cleanroom jumpsuit without allowing any portion to touch the floor. The recommended procedure is to gather the arm and leg

cuffs at the bottom of the jumpsuit zipper. Place one leg into the leg of the jumpsuit while releasing the leg from the zipper bottom. Pull the jumpsuit on that leg such that it completely clears the shoe cover. Repeat for the second leg.

• 4. Holding the sleeves of the jumpsuit at the bottom of the zipper, arise and pull the waist of the jumpsuit to your waist. Put one arm into the

jumpsuit while releasing that cuff. Repeat with the second arm, then pull the upper part of the jumpsuit into place.

• 5. Zip the jumpsuit all the way to the top.
• 6. Put on the cleanroom boots while ensuring that the upper part doesn't touch the floor. Adjust the fit with the snaps for a snug, comfortable fit.
• 7. Check yourself in the mirror.
• 8. Put on a pair of gloves and safety glasses
• 9. Enter the second air shower.

Previously worn garment The procedure is the same, except that the garment is taken from your assigned hanger. Degowning Procedure The de-gowning procedure is the reverse of the gowning procedure.

• 1. Remove safety glasses.
• 2. Remove cleanroom gloves.
• 3. Remove boots wile making sure that the upper part of the boot never touches the cleanroom floor.
• 4. Remove the jumpsuit. Handle the jumpsuit by the cuffs and collar. Allow the jumpsuit to hang free and immediately hang it on your assigned

hanger.

• 5. Remove the hood and face veil and place it on the hanger.
• 6. Snap the boots to the legs of the jumpsuit.
• 7. Exit the cleanroom. Please be sure to swipe the card reader in the exit airlock.

Policies and Additional Information

• Operating Policies & Procedures Manual

– Can be found at http://www.nano.purdue.edu under the oprations tab

• Process guidance can be found using the BNC wiki at

– https://wiki.itap.purdue.edu/display/BNCWiki – For more details contact Justin Wirth (jcwirth@purdue.edu)

• Training on equipment can be requested using the iLabs

interface

– https://purdue.ilabsolutions.com/