Electrostatic Discharge - Alcatel-Lucent 1675 Manual De Seguridad

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Electrostatic discharge

Introduction
Electrostatic discharge (ESD), caused by touching with the hand for example, can destroy
semiconductor components. The correct operation of the complete system is then no
longer assured.
Industry experience has shown that all semiconductor components can be damaged by
static electricity that builds up on work surfaces and personnel. The electrostatic discharge
can also affect the components indirectly via contacts or conductor tracks. The
electrostatic charges are produced by various charging effects of movement and contact
with other objects. Dry air allows greater static charges to accumulate. Higher potentials
are measured in areas with low relative humidity, but potentials high enough to cause
damage can occur anywhere.
The barred-hand symbol
Circuit packs containing components that are especially sensitive to electrostatic discharge
are identified by warning labels bearing the barred-hand symbol.
ESD instructions
Observe the following ESD instructions to avoid damage to electrostatic-sensitive
components:
• Assume that all solid-state components and assemblies are sensitive to ESD.
• Wear working garments made of 100% cotton to avoid electrostatic charging.
• Touch the circuit packs at the edges or the insertion and removal facilities only.
• Touch the SFP modules at the edges only.
• Ensure that the rack is grounded.
• Wear a properly grounded ESD wrist strap (connected to the rack ESD bonding
point, for example).
• Work in an ESD safe work area or workstation. An ESD safe work area should be
equipped with a grounded ESD wrist strap and a grounded ESD mat or ESD
dissipative work surface.
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365-374-159R11.01.28 Release 11.01.28
Issue 1 November 2012
1675 LU MSS