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Electrostatic Discharge (ESD) Awareness and Control

What is static electricity?
Static electricity is a stationary charge of electricity resting on the object's surface.

How and when static charges are generated?
They are generated either by contact and separation of objects (known as direct charging by friction or triboelectric charging) or by passing one object through a charged electrostatic field surrounding another object (inductive charging).

Typical generators of static electricity:
• Work Surfaces - formica, finished wood, synthetic mats, ungrounded metal, glass or fiberglass
• Chairs - fiberglass, vinyl, other plastics, ungrounded metal, finished wood
• Clothes - synthetics, gloves, wool, shoes and boots
• Floors - carpeted, vinyl, waxed
• Packaging Materials - polyethylene bags, foam packaging pellets, plastic trays and boxes

What is electrostatic discharge (ESD)?
Electrostatic discharge is the sudden transfer of static charge between two objects. An example of this is the sight, sound and feel of the spark that "zaps" the person or other conductive surface that is touched after walking across a carpeted floor. Human senses can only perceive an electrostatic discharge of about 3,500 volts or higher. That is, we do not see, feel or hear static discharges below 3,500 volts.

Ideal ESD Workplace


Pros and Cons of Observing an Ideal ESD Workplace

Benefits for following ESD procedures: Causes of uncontrolled ESD:
  • Less work and inventory
  • Reduced overall cost
  • Fewer field failures
  • Increased product reliability
  • More repeat business resulting in greater profits
  • Degraded or lost service to customer
  • Increased maintenance and repair expenses
  • Higher amount of capital investment for the larger inventory of boards required for maintaining the desired service levels

Who are required to follow the ESD procedure?

Shipping Packing Unpacking Testing Transport


 
 
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