LFE 2000 Series - Page 28

t.ll
I'{Qj;]SIATIC
DISCHARGE
HANDLING
PRECAUTIONS
;::'r
CAUTJON;'r?,i
IN
HANDLING
MOS
INTEGMTED
CIRCUITS
AND
THE
UNI'IS
INTO T{HICH
THEY
HAVE
BEEN
INSTALLED,
SPECIAL
PRECAUTIONS
MUST
BE
OBSERVED
IN
THE
WORK
AREA
TO
PREVENT
STATIC
CHARGES
FROM
CAUSING
DEVICE
FAILURES.
The
precautlons
listed
below
are
recomrnended
to
:'
All
benches
used
for
assembly
or test
of
conductive
antrstat
i<: rnaterral.
j',\-]l
RF,V
iJ
rnrnfmf
ze these
fa'i
lures:
MOS
circuits
are to
be
covered
wrth
Conductrve
wrist
straps properly
that
body
charges
are
grounded.
grounded
should
be
worn
by
all
operators
s()
WARNING:
NEVER
EXPOSE
AN OPERATOR
DIRECTL,Y
TO
A HARI)
ELF]CTRICAI,
GROUND.
FOR
SAf
ETY REASONS,
THE
OPEMTOR
MUST
HAVE
A
RE,SISTANCE
OF
AT
I,EAST
1OOK OHMS
BETWEEN
HIMSELF
ANI)
HARD
ELECTRICAL
GROUND.
Antr-static
netttralized
srnocks
are vrorn
to elirninate
statjc
charges
generated
by
frrction
of clothrng
layers
during
normal
wear,
Cotton
gloves
are
worn
when
handlrng
MOS
devices.
Nylon
gloves
or
finger
cots
can
NOT
be rrsed.
Al1
MoS
parts
mllst
be left
in conductive
trays.
The
use of
plastic
containers
rs not
al
lowed.
The
use
of
a
conductive
foam
such
as Velofoanr
lt761l
is
suggested.
Solderlrrg
j
rorts
mrlst
have
grounded
tips.
At,tent ion
shoul d be
grven
to 11y
equipment
that
may be
rrtductively
coupled
t.hat
can
generate
stray
volt;rges.
MOS
parts
should
be
handled
on
grounded
conductjve
surfaces
and the
oper;rtttr
must
touch the
conductive
surface
before
touching
the
parts.
MOS
devi-ces
shotrld
not be
handled
by thelr
leads but
by thelr
packages
insteacl.
In
general,
materials
prone
to statlc
charge
accumulation
should
not corne
irrtrr
contact
wrth
MOS devlces.
-2t-
LFE Instrunents
Division