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Don’ts
Don’t allow anyone not grounded to touch devices, loaded
sticks or loaded burn-in boards. To be grounded they must be
standing on a conductive floor mat with conductive heel straps
attached to footwear or must wear a grounded wrist strap.
Don’t touch the devices by the pins or leads unless
grounded since most ESD damage is done at these points.
Don’t handle devices or loaded sticks during transport from
work station to work station unless protected by shielding
bags. These items must never be directly handled by any-
one not grounded.
Don’t use freon or chlorinated cleaners at a grounded work
area.
Don’t wax grounded static controlled conductive floor and
bench top mats. This would allow build-up of an insulating
layer and thus defeating the purpose of a conductive work
surface.
Don’t touch devices or loaded sticks or loaded burn-in
boards with clothing or textiles even though grounded wrist
strap is worn. This does not apply if conductive coats are
worn.
Don’t allow personnel to be attached to hard ground. There
must always be 1 megohm series resistance (1/2 watt
between the person and the ground).
Don’t touch edge connectors of loaded burn-in boards or
empty burn-in boards containing permanently mounted
driver circuits when not grounded. This also applies to burn-
in programming cards containing ICs.
Don’t unload stick on a metal bench top allowing rapid dis-
charge of charged devices.
Don’t touch leads. Handle devices by their package even
though grounded.
Don’t allow plastic ‘‘snow or peanut’’ polystyrene foam or
other high dielectric materials to come in contact with
devices or loaded sticks or loaded burn-in boards.
Don’t allow rubber/plastic floor mats in front of static con-
trolled work benches.
Don’t solvent-clean devices when loaded in antistatic sticks
since this will remove antistatic inner coating from sticks.
Don’t use antistatic sticks for more than one throughput pro-
cess. Used sticks should not be reused unless recoated.
Recommended Maintenance Procedures
Daily
Perform visual inspection of ground wires and terminals on
floor mats, bench tops, and grounding receptacles to ensure
that proper electrical connections via 1 megohm resistor (1/2
watt) exist.
Clean bench top mats with a soft cloth or paper towel damp-
ened with a mild solution of detergent and water.
Weekly
Damp mop conductive floor mats to remove any accumu-
lated dirt layer which causes high resistivity.
Annually
Replace nuclear elements for ionized air blowers.
Review ESD protection procedures and equipment for
updating and adequacy.
Static Controlled Work Station
The figure below shows an example of a work bench prop-
erly equipped to control electro-static discharge. Note that
the wrist strap is connected to a 1 megohm resistor. This
resistor can be omitted in the setup if the wrist strap has a 1
megohm assembled on the cable attached.
ESD WARNING SYMBOLS
CONDUCTIVE BENCH TOP
R
CONDUCTIVE WRIST
STRAP
R
CONDUCTIVE BENCH TOP
WRIST STRAP GROUND
LEAD IS ATTACHED TO
R = 1 MEGOHM
GROUND, i.e. COLD WATER
PIPE OR EQUIVALENT
BUILDING FLOOR
R
DISSIPATIVE FLOOR MAT
Technical Brief 52
Содержание Gates One 994 9202 002
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Страница 40: ...Figure 5 1 PDM Flow Diagram 5 2 888 2314 001 Rev T Jan 1996 WARNING Disconnect primary power prior to servicing...
Страница 42: ...Figure 5 2 PDM Loop 5 4 888 2314 001 Rev T Jan 1996 WARNING Disconnect primary power prior to servicing...
Страница 43: ...Figure 5 3 RF Flow Rev T Jan 1996 888 2314 001 5 5 WARNING Disconnect primary power prior to servicing...
Страница 76: ...C 6 888 2314 001 Rev AE 03 05 2002 WARNING Disconnect primary power prior to servicing...
Страница 82: ...E 4 888 2314 001 Rev AE 03 05 2002 WARNING Disconnect primary power prior to servicing...
Страница 88: ...F 6 888 2314 001 Rev AE 03 05 2002 WARNING Disconnect primary power prior to servicing...
Страница 96: ...H 2 888 2314 001 Rev AA 8 18 1999 WARNING Disconnect primary power prior to servicing...
Страница 104: ...K 2 888 2314 001 Rev AE 03 05 2002 WARNING Disconnect primary power prior to servicing...
Страница 105: ...Figure K 1 Interface Board Rev AE 03 05 2002 888 2314 001 K 3 WARNING Disconnect primary power prior to servicing...
Страница 108: ...L 2 888 2314 001 WARNING Disconnect primary power prior to servicing...
