IPC-TM-650 EN 2022 试验方法--.pdf - 第237页
J-STD-004 T ab le 1 Solder Float T emperatures Figure 1 So lder float test fixture The Institute for Int erconnecting and Packaging E lectronic Circuits 2215 S anders Road • Northbrook, IL 60062-6135 Material in this T est…
Note:
Note:
IPC-TM-650
IPC-D-330
Note:
Note:
Figure 1 Fatigue Ductility Flex Tester
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
Scope
With
this
test
method,
the
flexural
fatigue
life
for
any
given
bend
radius,
the
flexural
fatigue
behavior,
and
the
ductility
of
the
metal
cladding
in
percent
deformation
after
ten¬
sile
failure
can
be
determined.
The
indirect
determination
of
cladding
ductility
by
using
a
fatigue
test
is
made
necessary
by
the
geometry
and
dimen¬
sions
of
foil
samples,
which
make
tensile
elongation
and
rup¬
ture
tests
inadequate
for
ductility
determination.
Processing
may
change
the
original
mechanical
prop¬
erties
of
the
conductor
metal.
2
Applicable
Documents
Test
Methods
Manual
2
.1
.1
Microsectioning
2
.4.18
Tensile
Strength
and
Elongation,
Copper
Foil
IPC
Design
Guide
3
Test
Specimen
Foil/dielectric
laminate
of
sufficient
size
to
permit
cutting
of
three
3.2
mm
wide
specimens
of
at
least
50.8
mm
in
length.
Specimens
must
be
clean
cut
and
free
of
burrs
and
nicks.
4
Equipment/Apparatus
4.1
Ductility
Flex
Tester,
Universal
Mfg.,
Model
FDF
or
2FDF
or
equivalent
(see
6.4
and
Figure
1)
4.2
Sample
cutter,
punch
or
tensile
cut
router
(see
6.4.2)
4.3
Micrometer
tool
capable
of
measurement
to
the
nearest
0.0025
mm
4.4
Hewlett-Packard,
HP-67,
Programmable
Calculator
or
equivalent
4.5
Sample
holders,
203.2
mm
x
12.7
mm,
of
very
flexible
material
(e.g.,
epoxy
impregnated
glass
cloth,
paper,
etc.)
4.6
Microscope
-
capable
of
200X
5
Procedure
5.1
Preparation
of
Samples
Number
2.4.3.2
Subject
Flexural
Fatigue
and
Ductility,
Flexible
Metal-Clad
Dielectrics
Originating
Task
Group
N/A
Date
Revision
3/91
C
I
PC-242
1-2
5.1.1
The
samples
should
be
smooth
and
undistorted
(wrinkle
free).
5.1.2
Use
the
sample
cutter
to
cut
the
3.2
mm-wide
test
specimen.
Examine
each
specimen
for
nicks,
cuts,
or
curled
edges.
Discard
any
specimen
with
defects.
5.1.3
Use
the
micrometer
to
determine
the
specimen
thick¬
ness,
t,
in
the
center
of
each
specimen
to
the
nearest
0.0025
mm.
In
the
case
of
single
sided
specimens
the
core
thickness,
tM
has
to
be
determined
also
(see
Figure
2).
Thickness
is
a
critical
parameter
in
the
determination
of
fatigue
ductility.
A
10%
error
in
tM
results
in
a
14%
error
in
Df.
The
second
configuration
in
Figure
2,
the
core
thick¬
ness,
tM,
is
preferably
determined
as
a
fraction
of
the
speci¬
men
thickness,
t,
from
a
microsection
prepared
per
IPC-TM-
650,
Method
2.1
.1
,
and
measured
with
a
metallurgical
microscope
at
200X
minimum
with
a
suitable
filar
eyepiece
or
reticle.
The
measurement
is
to
be
made
from
the
valley
of
the
rough
surface
to
the
smooth
surface
or
valley
to
valley
where
both
surfaces
are
rough.
The
tM
is
to
be
made
once
on
a
J-STD-004
Table 1 Solder Float Temperatures
Figure 1 Solder float test fixture
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 1
IPC-TM-650
TEST
METHODS
MANUAL
1
Scope
This
test
method
establishes
and
defines
the
pro¬
cedures
for
determining
the
solder
float
resistance
of
copper
foil
clad
and
bare
flexible
dielectric
material.
2
Applicable
Documents
Requirements
for
Soldering
Fluxes
3
Test
Specimen
3.1
Two
specimens,
approximately
50
mm
x
50
mm
per
clad
side.
3.2
For
double
clad
laminate,
a
separate
specimen
unit
shall
be
prepared
and
tested
for
each
side.
The
copper
foil
shall
be
etched
from
the
reverse
or
nontest
side
of
each
specimen
using
standard
commercial
practices.
Bare
dielectric
material
shall
be
tested
bare.
4
Apparatus
4.1
Test
Chamber
A
circulating
air
chamber
capable
of
maintaining
a
uniform
temperature
of
135℃
±
10℃.
4.2
Solder
Pot
An
electrically-heated,
thermostatically-
controlled
solder
pot
of
adequate
dimensions
to
accommo¬
date
the
specimen
and
containing
no
less
than
2.25
Kg
of
solder.
4.3
Cutter
template
and
cutter
to
prepare
approximately
50
mm
x
50
mm
specimens
of
copper
clad
dielectric
material.
4.4
Solder
float
test
fixture
as
per
Figure
1
.
4.5
Sn60, Sn62,
or
Sn63
solder
conforming
to
J
-STD-004.
5
Procedure
5.1
Prepare
two
specimens,
clean
the
copper
foil,
then
pre¬
condition
the
test
specimen
in
an
air
circulating
oven
main¬
tained
at
135℃
±
10℃
for
one
hour.
Specimens
may
then
be
held
in
a
room
temperature
desiccator.
5.2
Remove
the
specimens
from
the
conditioning
chamber.
5.3
Attach
the
specimens
to
the
solder
float
test
fixture
with
Number
2.4.13
Subject
Solder
Float
Resistance
Flexible
Printed
Wiring
Materials
Date
Revision
5/98
F
Originating
Task
Group
Flex
Peel
Strength
Test
Methods
Task
Group
(D-13A)
a
thumb
tack
or
other
low
mass
holding
device
(Figure
1)
prior
to
floating
the
sample.
Float
the
specimen,
foil
side
down,
on
the
surface
of
the
molten
solder,
maintained
at
the
tempera¬
ture
specified
in
Table
1
,
for
1
0
seconds.
Method
A
260℃
土
5
℃
Method
B
288℃
±
5
℃
5.4
Float
the
specimen
on
the
surface,
then
remove
the
specimens
and
tap
the
edges
to
remove
excess
solder.
5.5
Evaluation
Thoroughly
clean
each
specimen
and
visu¬
ally
examine
for
blistering,
delamination
or
wrinkling.
For
bare
dielectric
films,
examine
for
blistering,
shrinkage,
distortion
or
melting.
6
Notes
6.1
For
materials
that
absorb
moisture,
the
preconditioning
in
this
method
is
required
to
remove
absorbed
moisture
from
the
materials.
Absorbed
moisture
can
volatilize
and
cause
delamination
and
blistering
because
of
the
rapid
temperature
rise
experienced
in
the
solder
bath.
Drying
may
not
be
required
for
materials
with
low
moisture
absorption
character¬
istics.
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.