IPC-TM-650 EN 2022 试验方法-- - 第163页

Figure 1 Method of holding device IPC-TM-650 Number Subject Date Revision Page 2 of 3 2.3.19 Volatile Content of Prepreg 12/94 C 21 6 cm (8 5 inj minimum TOP VIEW 5.3 Method B 5.3.1 Apply mold release to the alligator cl…

100%1 / 824
Table 1
Prepreg
(1)
Material Type
Oven
(1)
Temperature
Test
(1)
Time
Difunctional Epoxy,
Tetrafunctional Epoxy,
Multifunctional Epoxy,
Polyimide Blend
163°C (325°F) 15 ± 1 minute
Polyimide 225°C (437°F) 30 ± 1 minute
Cyanate Ester 145°C (293°F) 15 ± 1 minute
(1) For material types that do not conform to the types listed,
follow the manufacturer’s instructions for temperature and
time.
The Institute for Interconnecting and Packaging Electronic Circuits
2215 Sanders Road • Northbrook, IL 60062-6135
Material in this Test Methods Manual was voluntarily established by Technical Committees of the IPC. This material is advisory only
and its use or adaptation is entirely voluntary. IPC disclaims all liability of any kind as to the use, application, or adaptation of this
material. Users are also wholly responsible for protecting themselves against all claims or liabilities for patent infringement.
Equipment referenced is for the convenience of the user and does not imply endorsement by the IPC.
Page 1 of 3
IPC-TM-650
TEST
METHODS
MANUAL
1
.0
Scope
This
test
method
is
designed
to
measure
the
volatile
content
of
prepreg
used
as
bonding
plies
in
the
manu¬
facture
of
laminate
and
printed
boards.
2
.0
Applicable
Documents
None
3
.0
Test
Specimens
3.1
Specimen
Size
The
test
specimen
shall
be
a
ply
of
prepreg
cut
with
its
diagonal
parallel
to
the
X
or
Y
axis
of
the
prepreg.
The
specimen
shall
be
approximately
101
.6
x
101
.6
mm
[4
in
x
4
in].
A
hole
approximately
3.18
mm
[0.125
in]
in
diameter
shall
be
punched
in
one
corner
of
the
specimen.
3.2
Quantity
and
Sampling
Unless
otherwise
specified,
for
each
material
tested,
three
specimens
shall
be
prepared;
one
specimen
shall
be
cut
from
the
center
of
the
width
and
one
each
from
each
edge
of
the
sheet
of
prepreg.
Specimens
shall
be
cut
no
closer
than
25.4
mm
[1
in]
from
the
edge
of
the
prepreg
sheet.
4
.0
Apparatus
or
Material
4.1
Analytical
Balance
Analytical
balance
capable
of
weighing
to
the
nearest
milligram
[0.001
gram].
4.2
Oven
Air
circulating
oven
capable
of
maintaining
±
2.8℃
[±
5°F]
at
the
specified
test
temperature
(see
Table
1).
4.3
Desiccator
Desiccation
chamber
capable
of
maintain¬
ing
an
atmosphere
less
than
30%
R.H.
at
23℃
[73.
4°
F].
Vacuum
drying
systems,
or
equivalent,
that
could
absorb
or
remove
organic
components
shall
not
be
used.
Number
2.3.19
Subject
Volatile
Content
of
Prepreg
Date
Revision
12/94
C
Originating
Task
Group
MIL-P-13949
Test
Methods
Task
Group
(7-1
1b)
4.4
Hanging
Device
to
Support
Prepreg
4.4.1
Paper
clip,
alligator
clip,
or
equivalent
(Method
A)
4.4.2
Clip
jig,
as
shown
in
Figure
1
.
(Method
B)
5.0
Procedure
5.1
Specimen
Preparation
5.1.1
The
prepreg
shall
be
cut
to
conform
with
the
speci¬
men
size
and
configuration
as
per
3.1
.
5.1.2
Preconditioning
Unless
the
prepreg
is
tested
within
10
minutes
of
manufacture,
specimens
shall
be
desiccated
for
24
±
2
hours
before
testing.
Specimens
tested
as
part
of
manufacturing
control
procedures
are
exempt
from
desicca¬
tion.
For
referee
testing,
desiccation
shall
be
performed.
(See
6.1.)
5.2
Method
A
5.2.1
Apply
mold
release
to
the
hanging
device
and
allow
to
air
dry.
5.2.2
Weigh
the
hanging
device
to
the
nearest
milligram
[0.001
gram].
Record
as
W
「
5.2.3
Weigh
each
specimen
with
a
hanging
device
to
the
nearest
milligram
[0.001
gram].
Record
as
W2.
5.2.4
Place
each
specimen
and
hanging
device
in
the
air
circulating
oven
at
the
temperature
and
for
the
time
specified
in
Table
1
or
by
the
governing
document.
5.2.5
Remove
each
specimen
with
the
hanging
device
and
weigh
within
two
minutes
to
the
nearest
milligram
[0.001
gram].
Record
as
W3.
5.2.6
Calculate
and
record
the
volatile
content
as
follows:
Volatile
content
(%)
二
一
寻)
x
100
=
(see
5.2.2)
V
2
"
W2
=
(see
523)
W3
=
(see
5.2.5)
Figure 1 Method of holding device
IPC-TM-650
Number
Subject Date
Revision
Page 2 of 3
2.3.19
Volatile
Content
of
Prepreg
12/94
C
21
6
cm
(8
5
inj
minimum
TOP
VIEW
5.3
Method
B
5.3.1
Apply
mold
release
to
the
alligator
clips
on
the
appa¬
ratus
shown
in
Figure
1
and
allow
to
air
dry.
5.3.2
Weigh
each
specimen
to
the
nearest
milligram
[0.001
gram].
Record
as
W1
.
5.3.3
Secure
each
specimen
at
diagonally
opposite
comers
from
the
metal
hanging
apparatus
as
shown
in
Figure
1
.
5.3.4
Place
the
apparatus
with
specimens
in
the
air
circulat¬
ing
oven
at
the
temperature
and
for
the
time
specified
in
Table
1
or
by
the
governing
document.
5.3.5
Remove
the
specimens
from
the
oven
and
from
the
holding
apparatus
and
weigh
each
specimen
within
two
min¬
utes
to
the
nearest
milligram
[0.001
gram].
Record
as
W2.
5.4
Calculation
Calculate
and
record
the
volatile
content
as
follows:
,叫-
W2x
Volatile
Content
(%)
二
(
一
—
——
)
x
100
5.5
Report
The
results
should
be
reported
and
shall
con¬
tain
the
following:
(1)
Identification
of
prepreg
material
type
tested.
(2)
Percent
volatile
content
for
each
specimen
tested
and
the
average.
(3)
Test
temperature
and
time
in
oven.
IPC-TM-650
Number
Subject Date
Revision
Page 3 of 3
2.3.19
Volatile
Content
of
Prepreg
12/94
C
6.0
Notes
6.1
Moisture
Content
6.1.1
Exclusion
of
Moisture
Content
Desiccation
of
the
specimens
is
performed
for
the
following
reasons.
6.1.
1.1
This
test
method
is
based
on
the
understanding
that
"Volatile
Content"
refers
to
organic
solvents
and
other
ingre¬
dients
of
the
prepreg
that
may
remain
in
the
material
after
curing.
Water
or
moisture
content
is
not
considered
as
a
"Volatile”
for
purposes
of
this
test,
and
therefore
desiccation
is
a
fundamental
step
to
exclude
H20
from
the
data.
It
is
not
possible
to
remove
all
H20
from
material
that
is
hygroscopic,
but
the
most
significant
content
is
removed.
6.1.
1.2
This
method
has
a
high
intrinsic
variability
potential,
and
since
moisture
content
is
extremely
variable
and
depen¬
dent
on
the
storage
environment,
meaningful
data
is
best
achieved
by
removing
the
moisture.
6.1.2
Moisture
Content
Determination
This
method
can
be
performed
in
an
alternative
manner,
in
which
the
specimen
is
weighed
before
it
is
desiccated.
The
difference
between
the
"As
Is
Weight”
and
the
"Weight
After
Desiccation"
(but
before
oven
drying)
is
the
moisture
content.
6.2
Alternate
Specimen
Holder
Method
B
has
been
designed
to
minimize
the
problem
of
specimens
flopping
around
in
the
air
circulating
oven.
6.3
Desiccator
Conditions
The
Test
Methods
Task
Group
determined
that
a
great
majority
of
test
laboratories
are
unable
to
consistently
hold
the
Relative
Humidity
in
a
desiccator
to
less
than
20%.
Based
on
data
from
participating
company
lab
management,
the
lowest
practically
feasible
RH
for
use
with
the
affected
IPG
Test
Methods
is
30%
maximum.