For computers and associated equipment, please make sure the cleanroom manager knows you plan
to bring these items in and if you require LAN access from within the cleanroom. Before entering any
part of the cleanroom, pre-clean the items with IPA and fiber free wipes. Detailed cleaning
instructions will follow this general guideline.
For equipment such as computers, keyboards etc, vacuum clean using a general purpose vacuum
cleaner. Particular attention should be paid to the ventilation ports. This pre clean should be done
external to the cleanroom and anteroom and items should be covered with clean bagging material,
but not of cleanroom quality. As a guide, notebook computers are preferred to desktop computers
(although this is not always practical) not only due to size but also from a cleanliness aspect. Clean
all equipment at an external location to the cleanroom. This equipment can then be bagged to
Small metallic items (screws, nuts, washers) and non metallic items that are safe to use with
solvents must be cleaned using the ultra sonic cleaner located in the chemical lab. Upon entering the
cleanroom anteroom remove from packaging and visually inspect for any obvious signs of
contamination that may have been missed and re-clean if necessary. The best way to visually
inspect any item is to view the item surface at a five degree angle with good background lighting
When cleaning items using wipes provided in the anteroom do the following:
Fold the wiper in half and then fold in half again.
If the person who performs the cleaning operation then goes into the cleanroom, a new pair of
cleanroom gloves must be fitted. The clean item can then be taken into the cleanroom and any
necessary final cleanup can be done within the cleanroom as described above using wipers and IPA
Cleaning and decontaminating cleanrooms are critical tasks to ensure both the integrity of the cleanroom itself and the products made within it. The cleaning activities are therefore tightly controlled, with cleaning products, cleaning methods and cleaning frequencies carefully spelled out in detailed standard operating procedures. Not all cleanrooms are cleaned the same way. The specific cleaning products, methods and frequencies are carefully selected based on the cleanroom class, the contaminants of major concern, the products manufactured and the materials of construction within the room itself. As an example, in ISO Class 3 cleanrooms used to manufacture electronic devices minimization of particle levels is critical, while in ISO Class 5 sterile cleanrooms used to manufacture pharmaceutical or biotechnology products minimization of contamination from bacteria and other viables is paramount.
We invite GSFCC blog readers to contribute articles on this important topic.
Following are references that can be consulted for additional information: