Cleanroom Gowning Checklist for Fabs (Free)

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12 critical items still open - these are the highest-risk gaps.

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Before entering the gowning area

No makeup, perfume, nail polish or artificial nails in the clean zoneCRITICALNo food, gum, candy or tobacco beyond the controlled break areaCRITICALPersonal items such as phones, paper and pens stored in the locker or approved for the roomCRITICALStreet shoes cleaned on tacky mat or shoe cleanerHair, beard and moustache contained for the next stepVisitor badge and training status checked at the entranceAny cold, cough, open wound or skin condition reported to supervisorCRITICALRestroom visit completed before gowning, since exit means regowning

Gowning room: clean to cleaner order

Hands washed and dried with the approved wipe or dryerHood or head cover put on first, covering all hair and earsCRITICALFace mask or beard cover fitted over nose and mouthCRITICALGarment package opened without touching the floorCoverall or bunny suit stepped into without letting it touch the floorCRITICALZip fully closed up to the collar and hood tucked insideBoots or shoe covers put on, pant legs tucked in or sealedSafety glasses or goggles fitted where the area requires themInner gloves put on last, cuffs placed over the sleeve endsCRITICAL

Final check before entering the fab

Mirror check: no skin, hair or street clothes visibleCRITICALGloves intact, correct size and no residueGarment free of tears, loose threads and visible soilESD check: wrist strap or footwear tester passed where requiredCRITICALAir shower used for the full cycle where installedBadge and pass log updated for the controlled areaGarment ID and size matched to the person if assigned

Inside the cleanroom

Do not touch face, hood or mask with glovesCRITICALChange gloves when torn, contaminated or after touching non clean surfacesUse cleanroom paper and approved pens onlyWalk, do not run, and avoid fast arm movement near open wafers or FOUPsReport any spill, particle alarm or garment damage immediatelyTools and carts wiped or cleaned before entering

Exit and garment handling

Outer gloves removed first and disposed in the binReusable garments hung on assigned hangers inside out where policy says soDisposable items discarded in the gowning room binDamaged or soiled garments tagged for laundry or repairHands washed after leaving the gowning areaRegowning done in full after any break outside the clean zoneCRITICAL

Every critical item must pass. Any critical miss means the person regowns before entry. Adjust the list to your fab's ISO 14644 class, garment type and written gowning procedure.

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How to use the checklist

Print it for gowning room training, keep it at the entrance for audits, or tick through it on a tablet. Critical items are the ones most tied to particle shedding, such as hood and mask coverage, glove cuffs and the final mirror check. A missed critical item means regowning before entry. Many fabs also add a short supervisor observation of a few operators per shift, which turns the list into trend data on where gowning breaks down.

Why order matters

Gowning goes from the top of the body to the bottom and from the dirtiest items to the cleanest. Hood first, then mask, then coverall, then boots, then gloves last, so the gloves touch the least. This limits particles falling from hair onto garments that are already on and keeps the glove surface clean. The principles come from ISO 14644 cleanroom practice and each fab's own contamination control plan. Your written procedure takes priority over any generic list.

Cover hair and skin before any garment touches the floor zone
Never let garments touch the floor
Gloves last and checked for tears
Regown fully after leaving the clean zone

Common mistakes and audit tips

The usual failures are exposed hair at the neckline, mask below the nose, sleeves not covering the wrists, and reusing gloves after touching a phone, face or door handle. In OSAT assembly areas, people also forget that gowning applies to engineers walking through briefly. For audits, sample at the gowning room exit, pair it with particle count data, and log the findings. When a particle excursion appears, gowning observations are one of the first places to look.

Frequently Asked Questions

Does this replace our written gowning procedure?

No. Treat it as a starting point. Your own SOP, ISO 14644 class, garment type and contamination control plan define the required steps, and the SOP wins in any conflict.

Why are gloves put on last?

Gloves contact the garment cuffs and everything you touch while dressing. Putting them on last keeps them clean and sealed over the sleeve, which limits skin and fiber shedding at the wrists.

How often should gowning be audited?

Many fabs observe a sample of operators every shift or week, and audit more after particle excursions. The right frequency depends on class, risk and how stable your particle trend is.

Do OSAT assembly areas need the same gowning?

Not always. Assembly and test areas often run ISO 7 or 8 with simpler garments than a front end fab at ISO 5 or better. Use the level your classification and customer requirements specify.

If you want gowning audits, garment inventory and training status tied to your ERP or HR records, Netray can build that as a private app over your own data.

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