Manual

4-8 Safety
ESD Precautions
Electrostatic Discharge (ESD), also known as “static discharge”, is the sudden transfer of
electricity from one object to another (including people and tools). ESD can cause severe,
unnoticeable damage to electronic printed circuit assemblies (PCA), parts and assemblies.
Proper precautions must be taken to prevent the transfer of ESD damage while you are
handling sensitive components.
The following generally increases ESD:
•
low humidity (dry air)
•
movement across carpets
•
touching of plastics, synthetics and insulators
Most of the time, you cannot detect the presence of ESD. Occasionally, you may feel a slight
shock when touching an object when ESD is particularly high. However, imperceptible
levels of ESD that you cannot feel can damage electronic components. Assume that there is
always an ESD danger present in your environment.
ESD damage can occur at any time when you are assembling, testing or handling electronic
components. The following are recommended ESD safety precautions to be used whenever
handling electronic components, parts or assemblies:
•
Wear an ESD wrist strap while performing all tasks.
•
If a wrist strap is not available, always touch a bare metal grounded surface to
discharge built up electricity before touching the electronic components.
•
Never allow anyone to enter your work area unless they are wearing a wrist strap.
•
Use a dissipative floor mat under your work area.
•
Use only ESD approved equipment.
•
Ground all tools and equipment, if possible.
•
Keep your work area clean and clear of items such as packing foam and plastic
envelopes that can cause ESD.
•
Store all electronic PCA and assemblies in static safe bags.
•
Report any instances of ESD damage or potential damage to your supervisor
immediately.