The objective of a controlled cleanroom is to provide a contamination-free space in which to test or manufacture contamination-free products. However, contamination of various origins seems to find its way into even the most meticulous cleanrooms. Here are some hidden causes of contamination:

Poor gowning protocol, improper cleanroom garments, insufficient gowning for a particular class or infrequent changing of protective suits, gowns, gloves, and floor mats can cause contamination problems in a cleanroom.

It is vital to remember that most airborne particles from people migrate out of their cleanroom garments.

To combat this, it is important to use cuff sealing tape around the edges of the garment. 

Many labels are made from paper and have adhesives that leave behind residue. Tapes often come on cardboard cores. Both cardboard and paper release particulates into the environment and oftentimes adhesives and backings can outgas. Make sure you get your cleanroom tape and labels from a certified cleanroom consumable supplier. 

Stay tuned for Part II in our next issue!

Jennifer Nunes is with UltraTape of Wilsonville, Ore. www.cleanroomtape.com