E-Clean Dust-Free Cleanrooms
E-Clean builds and designs dust-free cleanrooms ranging from FS209E
levels 100 to 100,000, which equate to ISO 14644 levels 5 to 8. For
300,000-level cleanrooms, a sub HEPA filter may be used. For levels
100-100,000, we recommend installation of a system of primary,
secondary, and high-efficiency HEPA filters. The airflow rates of
the secondary and high-efficiency filters should be less than or
equal to the specified airflow rate of the cleanroom. Secondary
filters should be concentrated around the barotropic section of the
air handling system, while the high-efficiency filters should be
concentrated around the end of the air handling system
Additional Considerations for Dust-Free Cleanrooms
Dust-free cleanrooms maintain a positive pressure environment and
control the number of dust particles in the air via an advanced
filtration system. In addition to the filtration system, the level
of cleanliness in a cleanroom is determined by internal and
external environmental factors, such as the amount of people and
equipment contained within the cleanroom and the amount of traffic
passing through the room. The amount of air changes per hour (air
change rate or ACR), air velocity, method of airflow, fan size and
fan speed are just some of the variables that we consider when
designing a world-class cleanroom solution for your enterprise.
Our dust-free cleanroom series can be designed and built to suit
clients who require high-quality air filtration in the electronics,
semiconductor, precision fabrication, LCD manufacturing, optics,
circuitry, and other related industries.
lmportant Practices for Maintaining your Cleanroom
(1) When cleaning the walls of your cleanroom, use ESD cleanroom
wipes.
(2) Use a solution of 90% deonized water and 10% isopropyl alcohol
for surface cleaning.(3)Only use detergents that have been approved
for use in cleanroom environments.(4) Make sure to remove all
garbage and other waste from the cleanroom daily.
(5) Regularly vacuum your cleanroom, and keep a log of all cleaning
and vacuuming activities in your cleanroom with a "CeanroomCleaning
Log" that indludes columns for name, time and area cleaned.
(6) When cleaning the floor of your cleanroom, make sure to shut
off the air purification system and use a mop approved for use
incleanrooms.
(7) When vacuuming your cleanroom, use a vacuum that contains a
HEPA filter.(8) Regularly clean and maintain all windows and doors.
(9) Vacuum and mop your dleanroom daily; and clean walls, windows,
and doors weekly.(10)The undersurfaces of elevated floors must also
be cleaned regularly.
(11) Clean the columns and supports of elevated floors once every
quarter.
(12) When wiping surfaces, always wipe downwards. Start cleaning
your cleanroom from the location farthes
t from the entrance,
moving towards the entrance as you clean.
Dust-Free Cleanroom Management System
(1) Purpose: Enact a management system for the production process
that will alow supervision and management of cleanliness
whilepreventing contact with contaminants in order to have a
significant positive effect on product quality.
(2) Scope: Applicable to anyone or any thing that comes in or
around the cleanroom or related facilities.(3) Working Procedures:
(a) Employees with access to the cleanroom are required to take a
physical exam and produce proof of gooc
health annually.
(b)The number of people in the cleanroom at any time may not exceed
the quotient of (total are in square meters / 4).
(c) Refer to "Cleanroom Area Apparel Management System " for
information about the apparel allowed in the cleanroom.(d)Disinfect
the cleanroom with UV light for one hour daily when the cleanroom
is unoccupied. Disinfect with formaldahydefumigation for 30 minutes
once per month. Keep a log of both of these activities.
(e) All people entering and exiting the cleanroom must follow the
procedures outlined below:
Enter Controlled Area-Remove Shoes→Remove Clothing=→Wash Hands→Put
on Cleanroom Apparel→Disinfect Hands→AirShower→Enter Cleanroom
Approach Cleanroom Exit-→Exit Cleanroom→Remove Cleanroom
Apparel→Put on Original Clothes-Put on Shoes-Exit Controld
Area(f)Designate one person to be responsible for stocking and
replenishing hand disinfectant. Use 0.3% benzalkonium bromide hand
disinfectant.
(g) Employ pass bowes to transfer any material nto a cleanroom,
whether from the outside environment or from one cleanroom
toanother. This minimizes the amount of imes that the door to the
deanroom is opened, which in turn minimizes air contaminants in
thecleanroom.
(h) Sanitize all tables, workstations, benches, and the cleanroom
floor daily. Clean the walls of the deanroom weekly, and keep
adetailed log of all of these activities.
