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- Antistatic: The property of a material that inhibits
triboelectric charging.
- Antistatic Agent: A substance that is part of or topically
applied to a material to render the material surface static dissipative or
less susceptible to triboelectric charging.
- Common Type Plastics: Description given to plastic
materials that can generate and/or hold a measurable static charge.
- Conductive: A known physical property of a material which allows
charge movement. Less than 1 x 105
ohms/square surface resistivity, or less than 1 x 104
ohms-cm volume resistivity.
- Coulomb: this is defined as The unit of electrical charge. It is equal to the
charge carried by 6.24 X 1018
electrons.
- Current Transient: A rapid transfer of energy between two
objects. A current transient typically has a rise time of 1-5 nanoseconds
(10-9 seconds).
- Dissipative: A standard physical property of a material
which allows charge movement. Equal to or greater than 1 x 105
ohms/sq. to less than 1 x 1012
ohms/sq. surface resistivity or equal to, or greater than 1 x 104
to less than 1 x 1011 ohms-cm
volume resistivity.
- Discharge Time: The overall time necessary for a voltage
(due to an electrostatic charge) to decay from an initial starting value to
some arbitrarily chosen final value. Typically represented in
milliseconds.
- Electromagnetic Interference (EMI): A radiated pulse of
energy capable of causing unwanted current flow in electronic devices.
- Electrostatic Discharge (ESD): A transfer of an
electrostatic charge, either by direct contact or induced field, between
bodies at different potentials.
- Electrostatic Attraction (ESA): The attraction of airborne
particulate between bodies of different potentials.
- ESD/ESA susceptible devices: All electrical and electronic
devices, sub-assemblies, assemblies, products or systems that may be destroyed
or degraded due to an ESD/ESA event.
- Faraday Cage: A totally closed conductive container which
provides ESD and stray field protection.
- Homogeneous: Grounding characteristics which are spread out
uniformly throughout a material. Of uniform make-up or structure, or of the
same or similar kind.
- Induction: A process by which a static field can induce
charging of a nearby conductor without contacting it physically.
- Insulative: The ability to stop the passage of static
electricity into or out by interposing material that acts as a barrier. A
material having a surface resistivity of at least 1 x 1012
ohms/square.
- Joule: A unit of measurement for energy. One joule is equal
to one volt of potential times one coulomb of electric charge.
- Resistance: The ratio of voltage applied to current flowing
between a pair of terminals, without regard to the path which the current
takes (ohms).
- Resistivity: The electrical resistance of a surface (per
square of area) or of a volume (per unit of thickness. Volume: ohms-cm and/or
Surface: ohms/sq.).
- Surface Resistance: The ratio of DC voltage to the current
flowing between two electrodes of specified configuration that contact the
same side of a material. This measurement is expressed in ohms.
- Surface Resistivity: For electric current flowing across a
surface, the ratio of DC voltage drop per unit length to the surface current
per unit width. In effect, the surface resistivity is the resistance between
two opposite sides of a square and its independent of the size of a square or
its dimensional units. Surface resistivity is expressed in ohms/square.
- Triboelectric charging: The generation of electrostatic
charges when two materials make contact or are rubbed together then separated.
- Volume Resistivity: The ratio of the DC voltage per unit
area passing through a material. Generally given in
ohm-centimeters.
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Terminology
