Difference between revisions of "Cleanroom"

Latest revision as of 17:58, 9 December 2024

This page includes useful information on how to operate and behave inside hackerpace clean room. More details:

Other pages:

1. https://www.hackerspace.gr/wiki/Electronics-Lab-Specifications
2. https://www.hackerspace.gr/wiki/PCB-assembly
3. https://inventory.hackerspace.gr/

How to enter clean room

A very good introductory video on cleanroom behavior can be fount on the following link https://youtu.be/Um0VA6iycY4

Preparation

Prior to entering the change area, make the following preparations to ensure you are introducing as few particles as possible into the classified area:

• Wipe feet before entering
• Remove unnecessary street clothes
• Remove and store any personal items in storage provided
• Don mop cap/hairnet. Ensure all hair is tucked in
• Wash hands (using a skin disinfectant if appropriate), dry (using a non-linting towel or hand dryer) and apply suitable hand lotion
• Walk over the sticky mat ensuring both feet make contact and enter the clean room change area

Change Area

When you are inside the change area, move slowly and deliberately to generate as few particles as possible. You can now begin to gown:

• Pick out correct clean room clothing – coverall, head cover, overshoes, gloves, masks, goggles
• Inspect all garments for tears or rips – dispose of any that aren’t suitable and replace before continuing
• Put on facemask and/or hood, touching the inside of the hood only. Ensure all hair is tucked into the hood before adjusting
• Don your chosen garment, e.g. hooded Tyvek coverall
• Open zip
• Hold sleeve ends to shoulders and gather the material making the coverall as short as possible
• If a bench is available, sit down before gowning
• Place each foot in gathered coverall and pull up over legs
• Fasten any leg adjustments around the ankle (should be a snug fit)
• Stand up carefully, still holding the top half of coverall
• Place each arm in sleeves and pull up – outside of coverall should not touch the back of street clothes
• Tuck in head cover (if worn) and zip up coverall
• Fasten any neck and sleeve adjustments, again ensuring a snug fit

Entry into the Clean Room

It is good practice to have a stepover bench in place to separate the change area from the entrance area. The final gowning steps can be taken place inside the clean room entrance area:

• Once coveralls have been donned, footwear can be put on
• Sit on bench, lift one leg and put on footwear
• Swing leg over on to ‘clean’ side
• Repeat with the other leg
• Adjust footwear/boots so that they fit snugly and securely
• Put on protective goggles (if required)
• Check garments in a full length mirror to ensure there are no gaps between clothing and no hair is visible
• Remove donning gloves carefully (if not using the double gloving system) and wash hands and/or apply alcohol hand wash
• Working gloves can now be put on. They should be put on by touching the inside of the cuff only. Pull down cuffs after donning both gloves
• Enter clean room (over a sticky mat if provided)

Exit Procedure

• De-gowning is done in reverse to the gowning procedure – from the feet up.
• When exiting the clean room, leave via the entrance area and go through the gowning area to exit:
• Using the stepover bench, remove footwear one at a time, placing leg over to ‘dirty’ side once removed
• Unzip coverall
• Use hands within coverall, remove over shoulders and down to waist
• Still sitting, remove one leg
• Hold the empty arm and leg avoiding contact with the floor
• Remove other leg
• Remove hood and/or face mask
• Store re-usable garments in appropriate containers

Sources

1. https://angstromtechnology.co.uk/
2. Document about quality assurance containing useful info on clean room behavior: https://cloud.libre.space/s/AwLLPYxAHEyyFH6