anti static clean room flooring
TRANSCRIPT
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ANTI STATIC CLEAN ROOM FLOORING ESD Flooring Issues In Clean Rooms
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As electrostatic discharge (ESD) thresholds increase, awareness of ESD
standards and control in cleanrooms is a major concern.
ESD Floor
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Most polymer flooring materials are electrical insulators,
which can create static buildup.
ESD Floor
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Cleanroom floors are frequently found in
Electronics,
Pharmaceutical,
Biopharmaceutical,
Medical device industries,
Aerospace,
And other critical manufacturing environments.
Clean room flooring
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Anti Static and Conductive floors are designed to measure at or below
35 Million ohms.
Clean room flooring
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Typical contains from
500,000 to 1,000,000 particles
(0.5 microns or larger) per cubic foot of air.
Clean room flooring
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A Class 100 cleanroom is designed to never allow
more than 100 particles (0.5 microns or larger)
per cubic foot of air.
Clean room flooring
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Class 1000 and Class 10,000 cleanrooms are designed to limit particles to 1000 and
10,000 respectively
(In comparison, a human hair is about
75-100 microns in diameter).
Clean room flooring
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A particle 200 times smaller (0.5 micron) than the human hair
can cause major disaster in a cleanroom !
Clean room flooring
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Contamination can lead to expensive
downtime
and increased production costs.
Clean room flooring
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In fact,
the billion dollar NASA Hubble Space Telescope was damaged and did not perform as designed because of a particle smaller than 0.5 microns.
Clean room flooring
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ESA
is becoming more of a concern as static charges have been seen to actually bond contaminants to surfaces of products or tooling.
Clean room flooring
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Example:
for a 4” wafer, charged to 1000 volts, a particle of 1 micron in diameter would have the bonding force of over 830,000 pounds per square inch.
Clean room flooring
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Electrostatic attraction between charged objects and particles can be quite
strong compared to gravitational, aerodynamic, or
adhesion forces.
Clean room flooring
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Conductive work surfaces can be considered a current-carrying
hazard to people
and ESD-sensitive devices.
Clean room flooring
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ESD control measures traditionally have been required for:
• Defense, • Electronics assembly, • Wafer manufacturing, • Semiconductor, • & The disk drive industry.
Clean room flooring
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In the area of ESA control, these industries have ramped up ESA programs
for their cleanrooms:
• Fiber optics, • Medical, • Pharmaceutical, • Wafer, • And disk drive manufacturing.
Clean room flooring
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Controlling static electricity and ESD events in the cleanroom is important for these industries.
Clean room flooring
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ESD S20.20 recommends a
target RH between 30% – 70%.
< 30% RH, materials have a greater tendency
to charge.
Surface Resistance versus Relative Humidity (RH):
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www.epfloors.com
Join EP Floors Corp
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