IPC-TM-650 EN 2022 试验方法-- - 第239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]…

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IPC-TM-650
Number
Subject Date
Revision
Page 3 of 3
2.4.3.2
Flexural
Fatigue
and
Ductility,
Flexible
Metal-Clad
Dielectrics
3/91
C
5.3.2
Fatigue
Test
The
number
of
cycles
to
failure
is
the
flexural
fatigue
life
in
fully
reversed
bending
for
the
bend
radius
corresponding
to
the
radius
(1/2
diameter)
of
the
test
mandrel
used.
An
average
flexural
life
from
at
least
three
specimens
should
be
reported.
5.3.3
Fatigue
Behavior
The
fatigue
behavior
of
a
sample
can
be
obtained
by
determining
the
flexural
fatigue
life
with
a
number
of
different
diameter
mandrels.
Plotting
the
results
in
a
strain
range
versus
fatigue
life
Manon-Coffin
plot
log
Ae
=
[2tM/(2tp
+
t)]
versus
log
N
allows
intrapolation
and
extrapola¬
tion
to
other
bend
radii
or
fatigue
lives.
6
Notes
For
further
technical
details,
reference
the
material
given
in
6.1
through
6.3.
6
J
IPC-TP-204
Engelmaier,
W.,
A
New
Ductility
and
Flex¬
ural
Fatigue
Test
Method
for
Copper
Foil
Flexible
Printed
Wiring,
April,
1978
6.2
Engelmaier,
W.,
Fatigue
Ductility
for
Foils
and
Flexible
Printed
Wiring,
Program
No.
1883D
HP-67/97
User's
Library,
Hewlett
Packard
Co.,
Corvallis,
Oregon,
1978.
6.3
Engelmaier,
W.,
Fatigue
Ductility
Flex
Tester,
Drawing
L5201
63,
Bell
Telephone
Laboratories,
Inc.,
Whippany,
New
Jersey,
1978.
6.4
Test
Equipment
Sources
The
equipment
sources
given
in
6.4.1
and
6.4.2
represent
those
currently
known
to
the
industry.
Users
of
this
test
method
are
urged
to
submit
additional
source
names
as
they
become
available,
so
this
list
can
be
kept
as
current
as
possible.
6.4.1
Fatigue
Ductility
Flex
Tester,
Universal
Mfg.
Co.,
Inc.,
(201)
374-9800,
1168
Grove
St.,
Irvington,
NJ
07111.
6.4.2
JDC
Precision
Sample
Cutter,
Model
J
DC
125-N
or
equivalent.
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
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 2
2
.0
Applicable
Documents
1
.0
Scope
This
test
is
designed
to
determine
the
flexural
strength
of
laminates
of
thicknesses
greater
than,
or
equal
to,
0.51
mm
[0.020
in]
by
applying
a
specific
load
to
a
specific
size
and
shaped
specimen.
Flexural
Properties
for
Un
reinforced
and
Rein¬
forced
Plastics
and
Insulating
Material.
IPC-TM-650
TEST
METHODS
MANUAL
Methods
2.3.6,
Etching
Ammonium
Persulfate
Method
2.3.7,
Etching
Ferric
Chloride
Method
2.3.
7.1,
Cupric
Chloride
Etching
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
equivalent
means
(do
not
radius
the
edges.)
3.2
Quantity
and
Sampling
Unless
otherwise
specified,
four
specimens
shall
be
tested,
two
in
the
lengthwise
and
two
in
the
crosswise
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
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
sup¬
Number
2.4.4
Subject
Flexural
Strength
of
Laminates
(at
Ambient
Temperature)
Date
Revision
12/94
B
Originating
Task
Group
MIL-P-13949
Test
Methods
Task
Group
(7-1
1b)
ports
shall
be
in
accordance
with
ASTM-D-790
(in
order
to
avoid
excessive
indentation).
4.2
Etching
system
capable
of
complete
removal
of
the
metallic
cladding.
4.3
Measuring
devices
capable
of
determining
specimen
widths
to
the
nearest
0.025
mm
[0.001
in]
and
specimen
thickness
to
the
nearest
0.0025
mm
[0.0001
in].
5
.0
Procedure
5.1
Specimen
Preparation
5.1.1
When
applicable,
chemically
etch
off
all
metallic
clad¬
ding
in
accordance
with
standard
industry
etching
practices.
For
referee
purposes,
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
0.025
mm
[0.001
in]
and
thickness
to
the
nearest
0.0025
mm
[0.0001
in].
5.2
Measurement
5.2.1
Set
tester
for
the
required
span
and
crosshead
verti¬
cal
speed
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.
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.