introductiontocleanrooms[1]

7/30/2019 IntroductiontoCleanrooms[1]

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Introduction to Cleanrooms

Basic principles and protocols


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Purpose of Clean Protocol

Promote Successful Cleanroom OperationsEnsure Safety in the Clean EnvironmentProvide Operational Conditions that MeetProcess & User Needs


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Perspective

The protocol provides basic awareness and generalguidelines for cleanroom users.

Successful cleanroom operation relies on each usersunderstanding, participation and self discipline.

The success of each user relies on trust, understanding andshared responsibility among all users .


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What is a Cleanroom?

A clean environment designed to reducethe contamination of processes andmaterials. This is accomplished byremoving or reducing contaminationsources.


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Principles of the Clean Environment

Air is highly (HEPA)filtered (99.99% @ 0.3 m)

Layout should minimizeparticle sources in filteredair stream

Air flow should removemost particles generatedby process


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Types of Contamination

ParticulateDust, skin, hair, makeup

ChemicalOil, grease, metal ions, perfume

Biological

Bacteria, fungi, rodents???RadiationUltraviolet light


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Particle Characteristics

50 micron particles are visible Average human hair is about 100 microns

Time to fall 1 meter in still air33 seconds for 10 micron particle48 minutes for 1 micron particle

Humans generate >1x10 5 particles per minutewhen motionless (fully gowned)Humans can generate >1x10 6 particles whenwalking in the cleanroom


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Contamination Sources

People ~75% Ventilation ~15%Room Structure ~5%Equipment ~5%


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Contamination Control

Personnel ControlDress code

Personal HygieneGowning

Environmental ControlEntrance and exitMaterials and suppliesCleaning and maintenance

Atmospheric


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Dress code

No sleeveless shirtsNo shorts or skirtsNo slippers or sandalsNo jewelry that can puncture garments orgloves

Avoid clothing that sheds


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Personal Hygiene

Shower each day before entryControl Dermatitis & Dandruff Do not smoke before entryNo chewing gum or tobacco

No Cosmetics should be wornFacial hair will need to be covered


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Gowning

Proper gowning orderHair cover

HoodShoe coversCoverallGlovesFace mask Safety Glasses


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Gowning Basics

Garments should not be removed fromcleanroom unless in approved container

Dont walk out of the cleanroom with yourgarments onChange garments when soiled or showing

any visible signs of wearDont reach inside your garment while inthe cleanroom


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Garment Reuse and Storage

Reusable Store in Gown bin or zip lock bagCoverallsHoodKnee-high Booties (not the blue disposables)Safety Glasses

Not Reusable Throw in trashHair nets & Beard covers

Blue disposable shoe coversGlovesFace mask


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Entry & Exit

Enter and exit quicklyOnly one person may enter at a timeEach user must use their own access cardPass from the gowning area to the cleanarea slowly to reduce migration of particles between areas


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Materials and Supplies

Do Not carry non-cleanroom items into thecleanroom

Do not carry cleanroom items out of thecleanroomDo not use pencils or erasers

Paper should be kept in a plastic sleeveDo Not cut the cleanroom wipersClean everything you carry into the cleanroom


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Chemicals

Do not take new chemicals into the cleanroom withoutpermission

Always read MSDS for every chemical you useLarge quantities of chemicals must be stored outside thecleanroomChemicals inside the cleanroom should be properly stored

All chemical containers should be clearly labeled with theircontents and Hazard ClassificationUnattended chemicals and experiments should be labeledwith the owners name, immediate contact number, list of allchemicals involved, and estimated time of return orcompletion.


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Chemical Handling

Always use safety carriers with glass bottles 2Land largerDo not transport chemicals in open containersChemicals should be used inside approved hoodsor under properly positioned snorkel extractorsFull apron, Trionic gloves and full face shield arerequired for using all acidsGloves, lab coat, and safety glasses areconsidered minimum personal protectiveequipment when handling ANY chemical


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Chemical Handling

In case of a small spillInform all users in the cleanroom

Clearly mark the affected areaUse appropriate absorbent material to clean up thespill

In case of large spillInform all users in the cleanroomClearly mark the affected area and evacuateContact VEH&S and cleanroom staff immediately


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Chemical Handling

Chemical waste should be properly disposed of as outlined by VEH&S

No chemicals may be poured down the drainsWaste containers should be properly marked assuch and have a pink Hazardous Waste tag tiedto them at all timesIf you have questions about disposal contact astaff member


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In Case of Emergency

Always follow the rules set forth by VEH&SIf an emergency requires evacuation,leave the cleanroom immediately, do notstop to un-gownInform other users before leaving


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Equipment use

All users must be trained before using anyequipment

All equipment use should be scheduledIf you are unable to use scheduled time pleasedelete your reservationIt is every users responsibility to reportdamaged or malfunctioning equipmentIt is every users responsibility to properlyoperate and clean each piece of equipment thatthey use


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Housekeeping

Every user is responsible for keeping thecleanrooms clean

Always clean your workspace before leavingDont leave or store items on or in equipment Do not set liquids on any equipmentProperly store all materials before leaving thecleanroomLast one out should make sure the room is in asafe idle mode


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Violations of Rules

First timeWarningReport to Advisor

Second timeSuspension of accessReport to AdvisorRetraining may be required

Third Offense

Suspension of accessReport to Advisor Access will not be renewed until an acceptable resolution isreached between Advisor and Cleanroom ManagerCleanroom Protocol re-training will be required

introductiontocleanrooms[1]

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