IPC-TM-650 EN 2022 试验方法-- - 第241页

ASTM-D-790 IPC-TM-650 T a ble 1 Specimen Dimensions T est Parameters Nominal thickness 1 mm [inches] Width 2 mm [inches] Length 3 mm [inches] Span mm [inches] Speed of testing mm [inches] per min. 0.79 [0.031] 25.4 [1.0]…

100%1 / 824
IPC-TM-650
Number
Subject Date
Revision
Page 2 of 2
2.4.4
Flexural
Strength
of
Laminates
(at
Ambient
Temperature)
12/94
B
5.2.3
Specimens
shall
be
at
room
temperature.
Center
the
specimen
on
the
supports
with
the
long
axis
of
the
specimen
perpendicular
to
the
loading
nose
and
supports.
5.2.4
Apply
the
load
at
the
speed
of
testing
from
Table
1
until
the
specimen
breaks.
The
load
at
breakage
shall
be
recorded
in
pounds.
(P).
5.3
Calculation
and
Report
5.3.1
Calculate
the
flexural
strength
for
each
specimen
using
the
formula
below:
S
二
3PL
2bd2
S
=
Flexural
strength
in
psi
P
=
Load
at
breaking
(pounds)
L
=
Span,
inch
b
=
Width
of
specimen
d
=
Thickness,
inch
5.3.2
Average
the
flexural
strengths
and
record
in
psi.
5.3.3
Report
the
specimen
thicknesses,
individual
psi
val¬
ues,
and
average
psi
for
each
direction;
note
the
orientation
of
the
sample
panel
or
sheet
associated
with
the
direction
of
the
specimen.
6.0
Notes
None
6.1
Additional
information
and
background
useful
to
the
per¬
formance
of
the
test
may
be
found
in
ASTM-D-790.
ASTM-D-790
IPC-TM-650
Table 1
Specimen Dimensions Test Parameters
Nominal thickness
1
mm [inches]
Width
2
mm [inches]
Length
3
mm [inches]
Span
mm [inches]
Speed of testing
mm [inches] per min.
0.79 [0.031] 25.4 [1.0] 63.5 [2.5] 15.9 [0.625] 0.51 [0.020]
1.57 [0.062] 25.4 [1.0] 76.2 [3.0] 25.4 [1.0] 0.76 [0.030]
2.36 [0.093] 25.4 [1.0] 88.9 [3.5] 38.1 [1.5] 1.02 [0.040]
3.18 [0.125] 25.4 [1.0] 101.6 [4.0] 50.8 [2.0] 1.27 [0.050]
6.35 [0.250] 12.7 [0.5] 152.4 [6.0] 101.6 [4.0] 2.03 [0.080]
1.) Nominal thicknesses other than those listed shall be prepared and tested in accordance with the next greater nominal thickness.
2.) Width as cut and smoothed to within 5% of nominal shown.
3.) Length as cut (not necessary to smooth) to within 10% of nominal shown.
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
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Page 1 of 2
IPC-TM-650
TEST
METHODS
MANUAL
1
.0
Scope
This
test
method
is
designed
to
determine
the
flexural
strength
of
laminates
of
the
thicknesses
greater
than,
or
equal
to,
0.51
mm
[0.020
in]
by
applying
a
specific
load
to
a
specified
sized
and
shaped
specimen
at
elevated
tempera¬
ture.
2
.0
Applicable
Documents
Flexural
properties
of
un
reinforced
and
rein¬
forced
plastics
and
electrical
and
insulating
materials.
Method
2.3.6,
Etching
Ammonium
Persulfate
Method
2.3.7,
Etching
Ferric
Chloride
Method
2.3.7.
1,
Cupric
Chloride
Etching
Method
2.4.25,
Glass
Transition
Temperature
and
Cure
Factor
by
DSC
3
.0
Test
Specimens
3.1
Size
and
Configuration
Dimensions
of
the
specimens
shall
be
as
shown
in
Table
1
.
Edges
of
the
specimens
shall
be
free of
fractures,
delamination,
or
roughness
by
means
of
sanding
or
other
equivalent
means
(do
not
radius
the
edges).
3.2
Quantity
and
Sampling
Unless
otherwise
specified,
four
test
specimens
shall
be
cut
from
the
lengthwise
direction
of
the
sample
sheet
or
panel.
4
.0
Apparatus
or
Material
4.1
Tester
A
standard
tension
and
compression
test
appa¬
ratus,
which
can
be
operated
at
a
constant
rate
of
crosshead
Number
2.4.4.1
Subject
Flexural
Strength
of
Laminates
(at
Elevated
Temperature)
Date
Revision
12/94
A
Originating
Task
Group
MIL-P-13949
Test
Methods
Task
Group
(7-1
1b)
movement
shown
in
Table
1
.
The
error
in
the
load
measuring
system
shall
not
exceed
±
1
%.
The
loading
nose
and
supports
shall
have
cylindrical
surfaces.
The
radius
of
nose
and
support
shall
be
at
least
in
accordance
with
ASTM-D-790
(in
order
to
avoid
excessive
indentation).
4.2
Test
chamber
designed
to
shroud
the
specimens,
test
jaws
and
movable
shafts
as
an
integral
part
of
the
tester,
or
equivalent.
Chambers
must
be
capable
of
maintaining
the
test
temperature
as
shown
in
Table
2
to
within
土
3
℃
[5.4°F]-
4.3
Etching
system
capable
of
complete
removal
of
metallic
cladding.
4.4
Measuring
devices
capable
of
measuring
specimen
width
to
the
nearest
0.025
mm
[0.001
in]
and
specimen
thick¬
ness
to
the
nearest
0.0025
mm
[0.0001
in].
5
.0
Procedure
5.1
Specimen
Preparation
5.1.1
When
applicable,
etch
off
all
metallic
cladding
in
accordance
with
accepted
industry
practices.
For
referee
test¬
ing,
etching
shall
be
in
accordance
with
2.3.6,
2.3.7,
or
2.3.7.1
5.1.2
Cut
specimens
to
the
size
as
shown
in
Table
1
and
smooth
the
edges
of
specimens.
Measure
and
record
speci¬
men
width
to
the
nearest
0.0025
mm
[0.001
in],
and
thickness
to
the
nearest
0.0025
mm
[0.0001
in].
Table 2
Resin Type Thickness Test Temperature
Difunctional, tetrafunctional epoxies ALL 125°C
Hot Strength Retention Epoxies
High Temperature Epoxies
Up to 1.6 mm [0.063 inch]
1.6 mm [0.063 inch] and over
190°C
170°C
BT- epoxies
Modified epoxies
ALL 170°C
Polyimide of T
g
greater than 250°C
1
ALL 204°C
Polyimides of T
g
less than or equal to 250°C
1
ALL 170°C
Cyanate Esters ALL 204°C
1
T
g
measured by IPC-TM-650, Test Method 2.4.25
IPC-TM-650
Number
Subject Date
Revision
Page 2 of 2
2.4.4.1
Flexural
Strength
of
Laminates
(at
Elevated
Temperature)
12/94
A
5.2
Measurement
5.2.1
Set
tester
for
the
required
span
and
crosshead
verti¬
cal
speeds,
as
specified
in
Table
1
.
5.2.2
Align
the
loading
nose
and
supports
so
that
the
axis
of
the
cylindrical
surfaces
are
parallel,
and
the
loading
nose
is
midway
between
the
supports.
5.2.3
Condition
specimens
within
the
test
chamber,
for
one
hour
at
the
temperature
specified
(see
Table
2,
or
the
appli¬
cable
specification).
5.2.4
Center
the
specimen
on
the
supports
with
the
long
axis
of
the
specimen
perpendicular
to
the
loading
nose
and
supports
and
stabilize
for
2
minutes
at
temperature.
5.2.5
Apply
the
load
at
the
speed
of
testing
from
Table
1
until
the
specimen
breaks.
The
load
at
breakage
shall
be
recorded
in
pounds
(P).
5.3
Calculation
and
Report
5.3.1
Calculate
the
flexural
strength
for
each
specimen
using
the
formula
below:
S
=
3PL
2bd2
S
二
Flexural
strength
in
Psi
P
二
Load
at
breakage
(pounds)
L
=
Span,
inch
b
=
Width
of
specimen
d
=
Thickness
5.3.2
Average
the
flexural
strengths
and
record
in
psi.
5.3.3
The
specimen
thicknesses,
average
Psi,
and
test
tem¬
perature
shall
be
reported.
6.0
Notes
None
6.1
Additional
information
and
background
useful
to
the
per¬
formance
of
the
test
may
be
found
in
ASTM-D-790.