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CLEAN ROOM TRAININGPREPARED FOR USE AT APLCLEAN ROOM AREASJon CoopersmithScott LangeRob LeeSyed AliModified for Homewood use with permission from authorsCopyright JHU/APL 2002 All Rights Reserved1
CLEAN ROOM TRAININGPURPOSE - EDUCATION Copyright JHU/APL 2002 All Rights ReservedWhat’s importantWhat to doWhat not to doRational decisionsPrecautions2
CLEAN ROOM TRAININGWHAT WE WILL COVER Basics of clean room (video)Practices and applicationsDiscussionTour and questionsCopyright JHU/APL 2002 All Rights Reserved3
CLEAN ROOM TRAININGCLEAN ROOM USE Copyright JHU/APL 2002 All Rights ReservedDressingEntryWork placementActivityDiscipline4
CLEAN ROOM TRAININGCONTAMINATION TYPES Molecular contaminants Surface contaminants Particulate contaminantsCopyright JHU/APL 2002 All Rights Reserved5
CLEAN ROOM TRAININGMOLECULAR CONTAMINANTSOURCES OutgassingOil vaporsAlcoholsPaints, glues, & epoxiesAromatics; If you can smell it,suspect it as a contaminantNote: Particulate filters will NOT handle molecular contaminants!:Copyright JHU/APL 2002 All Rights Reserved6
CLEAN ROOM TRAINING SOURCES of SURFACECONTAMINATIONFinger prints Oil & greaseSkin oil Face powderHand cream PlasticizersFace cream WaxPolishCopyright JHU/APL 2002 All Rights Reserved7
CLEAN ROOM TRAININGSOURCES of PARTICULATES People (skin, scales, hair,clothing lint, etc.) Particle shedding materials(cardboard boxes, paper) Abrading actions (drilling,sawing, sanding, etc.) Bare wood productsCopyright JHU/APL 2002 All Rights Reserved8
CLEAN ROOM TRAININGRELATIVE PARTICLE SIZESMOST PARTICLES ARE TOO SMALL TO BE SEEN WITHOUTAID. THEIR SMALL SIZE RESULTS IN ELECTROSTATICBONDING TO SURFACESSMALLEST SIZEVISIBLE TO EYE.(50 MICRONS)SIZE PARTICLECOUNTED INCLEAN ROOMS.(0.5 MICRONS)HUMAN HAIR(100 MICRONS)Copyright JHU/APL 2002 All Rights ReservedMEASUREDPARTICLES ARE 100TIMES SMALLERTHAN SEEN BY THEUNAIDED EYE9
CLEAN ROOM TRAININGPARTICULATE SIZES/MATERIALSMETALLURGICAL DUST & FUMESATMOSPHERIC DUSTCARBON BLACKVISIBLETOBACCO SMOKEPOLLENSVIRUSESBACTERIAROSIN SMOKECLAY0.0010.01Copyright JHU/APL 2002 All Rights Reserved0.10.3MICRONSSILT1.010.0100.010
CLEAN ROOM TRAININGPARTICLE GENERATION ACTIVITYACTIVITY*PARTICLESDESCRIPTION OF ACTIVITY100,000MOTIONLESS IN EITHER SITTING ORSTANDING POSITION500,000HANDS, FOREARMS, NECK ANDHEAD 00HANDS, ARMS, TRUNK, NECK, HEADMOTION AND SOME LOWER BODYMOTIONSITTING TO STANDING OR VICEVERSAWALKING AT 2.0 MPHWALKING AT 3.5 MPHWALKING AT 5.0 MPH* MINIMUM 0.3 MICRON AND LARGERCopyright JHU/APL 2002 All Rights Reserved11
CLEAN ROOM TRAININGSIZE DISTRIBUTION of PARTICLES fromSNEEZES or COUGHSDIAMETER 1-1 uM 1-2 uM 2-4 uM 4-8 uM 8-16 uM 22 ALCopyright JHU/APL 2002 All Rights 0,76512
CLEAN ROOM TRAININGCLEAN ROOM CLASS DEFINITIONA CLASS (n) CLEAN ROOM ISDEFINED AS A ROOM WITH AIRCONTAINING NO MORE THAN (n)PARTICLES PER CUBIC FOOT EQUALTO OR LARGER THAN 0.5 MICRON.(WHERE “n” IS 100, 1,000, 10,000, ETC.)Copyright JHU/APL 2002 All Rights Reserved13
CLEAN ROOM TRAININGCLEAN ROOM CLASSESISO-14644578Copyright JHU/APL 2002 All Rights ReservedFed StdClass 100Class 10,000Class 100,000209EM3.5M5.5M6.514
CLEAN ROOM TRAININGDIRT CUBE1”1”1”ABOUT 6PARTICLES PER CU.IN. OR 10,000 PERCU. FT.Copyright JHU/APL 2002 All Rights ReservedABOUT 58PARTICLES PER CU.IN. OR 100,000 PERCU. FT.ABOUT 165PARTICLES PER CU.IN. OR 300,000 PERCU. FT.15
CLEAN ROOM TRAININGAIR FLOW Air entering the room is cleanAir leaving the room is dirtyAir flushes dirt out of the roomUnidirectional flow- predictablePosition yourself out of flowCopyright JHU/APL 2002 All Rights Reserved16
CLEAN ROOM TRAININGBLOCKAGE Blocking air flow is undesirable Blocking air-returns reducesflushing dirt away Blocking air to flight hardwareincreases the chance ofcontaminationCopyright JHU/APL 2002 All Rights Reserved17
CLEAN ROOM TRAININGACTIVITY Limit vigorous actions Apply discipline to all activity Bring only clean items into the cleanroom Limit soldering, drilling, etc. Use only house or HEPA filtered vacuum Never sweep or dust, use C/R wet mopCopyright JHU/APL 2002 All Rights Reserved18
CLEAN ROOM TRAININGGARMENTS Garments controlcontamination– They confine it inside or– They direct it to the floor Wear proper garments Wear garments properlyCopyright JHU/APL 2002 All Rights Reserved19
CLEAN ROOM TRAININGCLASS 10,000 REQUIRES Hoods, booties, face mask, gloves & antistatic coverallsGarment change once per week - minimumClean shoes with shoe cleaner before enteringEntering room by walking across tacky matKeep hood, if used, together with smockThrow away face mask & gloves on exitingUse approved wipes & note paperPre-cleaning all tools, equipment, hardware, etc., before taking itinto clean roomCopyright JHU/APL 2002 All Rights Reserved20
CLEAN ROOM TRAININGRULES No drilling, grinding, filing, sawingNo thread cutting, deburringNo soldering, brazing, weldingNo conformal coating or pottingNo cutting with diagonal pliersDo not vaporize plastic (wire insulation)Limit use of alcohol when cleaningMost glues not acceptableNo heat strippingNo masking, duct, adhesive tapes, only C/R tapesCopyright JHU/APL 2002 All Rights Reserved21
CLEAN ROOM TRAININGRULES (cont) No wood, cardboard, regular paperAvoid high outgassing materials (hydrocarbons)No gasoline vehiclesNo unpainted wood mockupsUse clean room note pads & paperNo felt tip or retractable pens, only ballpoint typeNo pencils or erasersUse proper tools that are cleanedDon’t touch face with glovesNo open cell foamsCopyright JHU/APL 2002 All Rights Reserved22
CLEAN ROOM TRAININGCLEANLINESS IS DEPENDENT On YOUOn informed and trained peopleOn limiting number of people in roomOn proper garment and dressOn no smoking, drinking, eating in themOn limited trips in/outOn good personal hygieneOn not blocking air returnOn cleaning all items prior to cleanroom entryOn frequent and thorough facility cleaningOn clean working proceduresCopyright JHU/APL 2002 All Rights Reserved23
CLEAN ROOM TRAININGTHE BOTTOM LINELIMITPEOPLE - ACTIVITY - MATERIALCopyright JHU/APL 2002 All Rights Reserved24
CLEAN ROOM TRAININGYOUare the keyELEMENTin goodCLEAN ROOM OPERATIONCopyright JHU/APL 2002 All Rights Reserved25
CLEAN ROOM TRAININGHomewood Key Contact InformationAll emergencies security(24hrs)x 67777City Fire Department : Pull alarm and dial911Office of Safety and Environmental Healthx 68798Johns Hopkins Emergency Notices Web ght JHU/APL 2002 All Rights Reserved26
26 CLEAN ROOM TRAINING Copyright JHU/APL 2002 All Rights Reserved Homewood Key Contact Information . Author: Andreas G. Andreou Created Date: 9/2/2015 3:54:03 PM
