Industry
ESD flooring for electronics manufacturing
Board assembly, rework and test are the rooms ANSI/ESD S20.20 was written for. The floor is one control item inside a program that also covers wrist straps, footwear, packaging and benches.[1]
What is different about these rooms
The floor is measured with the person on it
S20.20 qualifies a person, their footwear and the floor as one circuit, under 1.0 x 109 ohms and under 100 volts walking. Your footwear policy is part of whether the floor passes.
Dissipative is the usual band here
The ESD Association puts dissipative as the default for electronics work. Conductive gets specified when a discharge itself is the hazard, which is rarely a board line.
The audit trail is half the purchase
Resistance logs and a reverification schedule under ESD TR53 are what an auditor asks for. A floor with no readings behind it is a floor with no evidence.
Sources
- ANSI/ESD S20.20-2021, the ESD control program standard for electronics handling
ESD control program requirements (administrative and technical) for any organization that handles ESD-sensitive electrical or electronic parts.
www.esda.org - Conductive and dissipative ESD epoxy technical data sheet, resistance and cure figures
Cited here for the conductive flooring/coating resistance band. The ESD Association's own consumer-facing page states only the <= 1.0 x 106 ohm ceiling with no stated floor.
www.arcat.com
Every number on this page came from one of those documents. Send us the room and we will tell you which of them your floor has to answer to.