Electrostatic Discharge; Generating Static - Compaq Presario 1600 series Maintenance & Service Manual

Compaq.com - Compaq Presario Maintenance and Service Guide - 1600 Series
COMPAQ
Presario 1600 Series Portable Computers
Notice | Preface |
Removal & Replacement Procedures

Electrostatic Discharge

This chapter provides general service information for the Compaq Presario Series of portable
computers. Adherence to the procedures and precautions described in this chapter is
essential for proper service. The topics covered include
effects, a table of activities that
Preventing Electrostatic Damage to
Grounding Methods,
use in the service area. Return to
Electrostatic Discharge
A sudden discharge of static electricity from a finger or other conductor can destroy static-
sensitive devices or microcircuitry. Often the spark is neither felt nor heard, but damage
occurs. An electronic device exposed to electrostatic discharge (ESD) may not be affected at
all and will work perfectly throughout a normal cycle. Or it may function normally for a while,
then degrade in the internal layers, reducing its life expectancy.
Networks built into many integrated circuits provide some protection, but in many cases, the
discharge contains enough power to alter device parameters or melt silicon junctions.

Generating Static

The table below shows how different activities generate static electricity and at different
electrostatic voltage levels.
Typical Electrostatic Voltages
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Electrostatic Discharge
June 27, 2004
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