Types of Anti-Static Packaging

Container	Conductive Properties	Anti-Static Properties	Uses
	Non-Conductive 10^12 ohms per square	Container inherently builds up static less charge from handling.	Capacitors, resistors, and passive components for use ESD-safe area.
	10^8 to 10^10 ohms per square 5 KiloVolts to 50 Volts within 200 nanoseconds	Low initial charge on container. Container slowly dissipates charges over time.	Integrated circuits, assembled PCBs, microcontrollers.
	10^3 to 10^6 ohms per square 5 KiloVolts to 50 Volts within 200 nanoseconds	No initial charges on container. Provides direct path for charged to bleed off.	For use in environments with explosives and other settings that require a conductive non-metal container.

What is an Ohm per Square?

When measuring the resistance of thin materials, such as the wall of a container, it’s common to see the measurement recorded in Ohms-per-Square. No, this isn’t a mistake. Ohms-per-Square is the number of ohms from one side to another across an imaginary square of the material. Because we assume the material is very thin, the size of the square is irrelevant.

In order for this assumption to be valid, the thickness of the material must be less that 40% of the side length of the square. In order for a proper measurement to be taken, the distance from the edge of the film to the square must be 4 times larger than the side length of the square.