EN 7
3139 785 32970
2.
Precautions
Electrostatically Sensitive Devices (ESD)
Some semiconductor (solid state) devices can be
dam-agedeasily by static electricity.Such components
commonly are called Electrostatically Sensitive
Devices(ESD). Examples of typical ESD devices are
integrated circuits and some field-effect transistors
and semiconductor chip components. Thefollowing
techniques should be used to help reducethe
incidence of component damage caused by static
electricity.
(1) Immediately before handling any semiconductor
component or semiconductor-equipped assembly,
drain off any electrostatic charge on your body
by touching a known earth ground. Alternatively,
obtain and wear a commercially available
discharging wrist strap device, which should be
removed for potential shock reasons prior to
applying power to the unit under test.
(2) After removing an electrical assembly equipped
with ESD devices, place the assembly on a
conductive surface such as aluminum foil, to
prevent electrostatic charge buildup or exposure
of the assembly.
(3) Use only a grounded-tip soldering iron to solder or
unsolder ESD devices.
(4) Use only an anti-static solder removal devices.
Some solder removal devices not classified as
“anti-static” can generate electrical charges
sufficient to damage ESD devices.
(5) Do not use freon-propelled chemicals. These can
generate electrical charges sufficient to damage
ESD devices.
(6) Do not remove a replacement ESD device from
its protective package until immediately before
your are ready to install it.(Most replacement
ESD devices are packaged with leads electrically
shorted together by conductive foam, aluminum foil
or comparable conductive materials).
(7) Immediately before removing the protective
materials from the leads of a replacement ESD
device, touch the protective material to the chassis
or circuit assembly into which the device will be
installed.
2-3 ESD Precautions
CAUTION : Be sure no power is applied to the chassis
or circuit, and observe all other safety precautions.
(8) Minimize bodily motions when handling
unpackaged replacement ESD devices.
(Otherwise harmless motion such as the brushing
together of your clothes fabric or the lifting of your
foot from a carpeted floor can generate static
electricity sufficient to damage an ESD device).
Содержание BDP7100/12
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