Electrostatic Discharge - Fluke PM6685 Service Manual

Electrostatic discharge

Almost all modern components have extremely thin conductors and
metal oxide layers. If these layers are exposed to electrostatic dis -
charge they will break down or perhaps even worse, be damaged in a
way that inevitably will cause a breakdown later on. The lectro-tatic
Discharge, (ESD) sensitivity of MOS and CMOS semiconductors
have been known quite a while, but nowadays bipolar semiconduc -
tors and even precision resistors are ESD sensitive. Consider
therefoe all components, pc boards and sub assemblies as sensi -
tive to electrostatic discharge. The text below explains how you can
minimize the risk of damage or destroying these devices by being
aware of the problems, and learning how to handle these compo-
nents.
ESD sensitive options are packed in conductive containers
marked with the symbol to the leftl.
Never open the container unless you are at an ESD protected
work station.
Use a wrist strap grounded via a high resistance.
Use a grounded work mat on your work-bench.
Never let your clothes come in contact with ESD sensitive
equipment even when you are wearing a grounded
wrist strap.
Never touch the component leads.
Never touch open connectors.
Use ESD-safe packing materials.
Use the packing material only once.
Keep paper and non conductive plastics etc. away from your
work-bench. These may block the discharge path to
ground.
Electrostatic discharge 9-3