
28-11Capacitance and Capacitance Measurements
ere are also specially designed capacitors (e.g., mica, glass, oil, gas, and vacuum). ese capacitors
ar
e
u
sed
p
articularly
i
n
h
igh-voltage
(
35
k
V)
a
nd
h
igh-current
(
200
A
)
a
pplications
.
In th
e
ma
jority
of ca
ses,
th
e
ma
nufacturing
pr
ocess
of th
e
ca
pacitors
be
gins
by fo
rming
on
e
pl
ate
usi
ng
me
tallization
of on
e
sid
e
of a e
xible
di
electric
l
m
. A fo
il
su
ch
as al
uminum
is us
ed
as th
e
ot
her
pl
ate
. e l
m/foil
co
mbination
is ro
lled
on a su
itable
co
re
wi
th
al
ternate
la
yers
sl
ightly
ex
tended
an
d
th
en
he
at
tr
eated
. In so
me
ca
ses,
tw
o-foil
la
yers
ar
e
di
vided
by a di
electric
l
m
or pa
per
im
pregnated
wi
th