IPC-TM-650 EN 2022 试验方法-- - 第248页
IPC-TM-650 The Institute for Int erconnecting and Packaging E lectronic Circuits 2215 S anders Road • Northbrook, IL 60062-6135 Material in this T est M ethods Manual was voluntarily establis hed by T echni cal Committee…
5.5.2
Apply sufficient force to the punch using the appara-
tus in 4.6 to remove the section from the test specimen.
5.5.3
Use a permanent marker or vibrating scribe to serial-
ize each resulting piece.
5.6 Visual Examination
5.6.1
Visually examine each coupon and the extracted
pieces for evidence of tears or cracks of the solder mask.
6 Notes
6.1 Safety
Operator should be trained and familiar with the
hazards inherent to the chemicals being used and analyzed.
Proper personal safety equipment, such as safety glasses,
gloves and splash apron, and adequate ventilation shall be
used.
Number
2.4.7.1
Subject
Solder Mask - Determination of Machineability
Date
03/07
Revision
IPC-TM-650
Page
2
of
2
IPC-TM-650
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
determine
the
peel
strength
of
metallic
cladding
when
tested
in
the
following
conditions,
“as
received,”
after
thermal
stress,
and
after
exposure
to
processing
chemicals;
and
to
evaluate
the
base
laminate
material
after
the
peel
strength
test
is
completed
for
degradation
due
to
the
conditioning.
2
.0
Applicable
Documents
Method
2.4.
8.1
,
Peel
Strength,
Metal
Foil
(Keyhole
Method
for
Thin
Laminates)
Method
5.8.3,
Peel
Strength
Test
Pattern
3
.0
Test
Specimens
3.1
Size
and
Configuration
Specimens
shall
be
50.8
mm
x
50.8
mm
[2.0
x
2.0
in]
by
the
thickness
of
the
laminate.
Cladding
test
strips
shall
be
as
specified
(see
5.1
.2).
3.2
Quantity
and
Sampling
At
least
2
specimens
per
clad
side
per
each
test
condition
(see
5.2)
shall
be
taken
at
random
from
the
laminate
lot.
They
may
be
taken
from
samples
used
for
other
QA
testing
or
inspection.
One
specimen
per
side
shall
be
used
for
crosswise
and
one
specimen
per
side
for
lengthwise
testing.
4
.0
Apparatus
or
Material
4.1
Tensile
Tester
A
tensile
strength
tester
equipped
with
a
load
cell,
capable
of
measuring
to
the
nearest
0.0045
kg
[0.01
lbs],
and
light
load
wire
or
chain
and
clamp
at
least
457
mm
[1
8.0
in]
long
(its
weight
is
included
in
the
load
cell
calcu¬
lation).
The
clamp
jaws
must
cover
the
entire
width
of
each
peel
strip.
Any
equipment
or
apparatus
having
the
described
accuracy,
precision,
and
reproducibility
may
be
used.
4.2
Solder
Pot
A
solder
bath
or
pot
capable
of
maintaining
solder
at
the
specified
temperature
when
measured
25.4
mm
[1.0
in]
below
the
surface.
Type
Sn60
or
Sn63
solder
shall
be
used.
4.3
Specimen
Hold-down
A
suitable
hold-down
clamping
system
equivalent
in
performance
as
that
defined
in
IPC-TM-
650,
Method
2.4.8.1.
Number
2.4.8
Subject
Peel
Strength
of
Metallic
Clad
Laminates
Date
12/94
Revision
C
Originating
Task
Group
MIL-P-13949
Test
Methods
Task
Group
(7-1
1b)
4.4
Chemicals
A
minimum
of
two
ounces
of
the
following
processing
solutions:
4.4.1
Organic
chemical
stripper,
such
as
Methylene
Chlo¬
ride,
or
equivalent
4.4.2
Sodium
Hydroxide
10
gr/liter
4.4.3
Boric
Acid
30
gr/liter
and
Sulfuric
Acid
1
0
gr/liter
444
Organic
degreaser,
such
as
isopropyl
alcohol,
or
equivalent.
4.5
Hot
fluid
bath,
capable
of
being
maintained
at
the
speci¬
fied
temperature,
when
measured
25.4
mm
[1
.0
in]
below
the
surface.
4.5.1
Dow
Silicone
Fluid
No.
704,
or
equivalent.
4.6
Dow
Silicone
Grease,
Compound
4,
or
equivalent.
4.7
Data
Collection
For
qualification
testing,
a
recording
system
capable
of
permanent
data
retention
must
be
incorpo¬
rated
into
the
test
apparatus.
4.8
Etching
system
capable
of
complete
removal
of
metallic
cladding.
4.9
Measuring
device
capable
of
measuring
from
0.000
to
12.7
mm
[0.5
in]
to
within
土
0.0025
mm
[0.0001
in].
4.10
Etch
Resist
Materials
or
Systems
4.10.1
Platers
tape,
or
equivalent,
to
act
as
etch
resist
for
strip
formation
of
the
specified
widths
(see
5.2.1
.1
,
5.2.2.
1
,
and
5.2.
3.1).
4.10.2
Photoresist
system
(printing,
developing,
and
stripping).
5
.0
Procedure
5.1
Specimen
Preparation
Note:
IPC-TM-650
Number
Subject Date
Revision
Page 2 of 3
2.4.8
Peel
Strength
of
Metallic
Clad
Laminates
12/94
C
5.1.1
Cut
the
specimens
from
the
laminate
sample.
Speci¬
mens
shall
be
taken
no
closer
than
25.4
mm
[1
.0
in]
from
the
edge
of
the
laminate
sheet
as
manufactured.
5.1.2
Specimens
shall
be
prepared
with
at
least
four
resist
strips
of
the
width
specified
(see
5.2.
1.1,
5.2.2.
1
,
5.2.3.
1),
etched,
cleaned
and
processed
using
standard
industry
prac¬
tices
and
equipment.
For
qualification
and
referee
testing
the
specimen
shall
be
photoimaged
in
accordance
with
the
art¬
work
shown
in
Method
5.8.3
of
IPC-TM-650
except
that
tab
ends
are
optional.
Specimens
shall
be
etched
so
that
the
conductor
strips
on
one
specimen
are
in
one
direction
per
Figure
1
.
Double
clad
laminate
shall
have
each
side
tested
using
separate
specimens.
The
opposite
side
cladding
shall
be
either
fully
removed
or
left
fully
clad.
For
referee
testing
the
cladding
on
the
opposite
side
shall
remain.
Separate
speci¬
mens
for
both
the
warp
and
fill
directions
are
required
for
each
side.
5.1.3
Thin
specimens
may
be
provided
with
support
by
bonding
them
to
a
rigid
substrate
base,
or
may
be
tested
with
the
aid
of
the
keyhole
fixture
(see
Figure
2).
For
referee
testing
of
laminates
less
than
0.51
mm
[0.020
in],
the
specimens
shall
be
bonded
to
a
rigid
substrate
or
laminate.
Peel
values
can
be
affected
by
the
adhesive
used
to
bond
the
specimen
to
the
rigid
substrate.
It
is
imperative
that
the
best
adhesive
be
found
for
the
type
of
materials
being
bonded
to
least
influence
the
true
peel
strength
value.
5.1.4
For
referee
testing
and
qualification,
specimens
shall
be
preconditioned
by
baking
at
125℃
[257°F]
for
4
±
0.5
hours.
5.2
Measurements
5.2.1
Condition
A
Peel
Strength:
As
Received
5.2.1
.1
A
minimum
of
two
3.1
8
mm
[0.1
25
in]
test
strips
per
specimen
shall
be
peeled.
For
qualification
testing
four
3.18
mm
[0.125
in]
strips
per
specimen
shall
be
peeled.
5.2.
1.2
Adjust
the
measurement
system
to
compensate
for
the
weight
of
the
wire
and
clamp.
5.2.1
.3
Peel
the
test
strip
back
at
the
tab
end
(if
present)
no
more
than
12.7
mm
[0.5
in].
Attach
the
clamp
to
the
peeled
back
end
of
the
test
strip.
5.2.1.
4
Fasten
specimen
with
hold
down
fixture
so
that
an
unencumbered
vertical
pull
can
be
exerted.
The
end
of
the
test
strip
should
be
in
a
vertical
position
ready
for
testing.
The
wire
connecting
the
clamp
to
the
tensile
tester
must
be
free
to
pull
vertically
within
±
5°
angle.
5.2.1.
5
Start
tester
and
apply
force
in
the
vertical
direction
at
the
rate
of
50.8
mm
[2.0
in]/minute,
until
at
least
a
25.4
mm
[1
.0
in]
peel
is
completed
(see
Note
6.1).
5.2.1.
6
Observe
and
record
the
minimum
load
as
defined
by
Figure
1
.
Measure
the
actual
width
of
the
test
strip
and
record
with
the
minimum
load.
5.2.1.
7
If
the
full
width
of
the
test
strip
does
not
peel,
the
results
shall
be
discarded
and
another
strip
tested.
5.2.2
Condition
B
Peel
Strength:
After
Thermal
Stress
5.2.2.1
A
minimum
of
two
3.18
mm
[0.125
in]
test
strips
per
specimen
shall
be
peeled.
For
qualification
testing
four
3.18
mm
[0.125
in]
strips
per
specimen
shall
be
peeled.
5.2.2.2
Apply
a
thin
coating
of
silicon
grease
to
specimens
and
float
on
solder
maintained
at
288℃
±
5.5℃
[550°
F
土
10°F]
for
10
seconds,
+1,-0.
5.2.2.3
Cool
specimens
to
laboratory
ambient
temperature,
Clean
the
grease
off
and
perform
steps
5.2.1
.2
through
5.2.1.
7.
5.2.3
Condition
C
Peel
Strength:
After
Exposure
to
Pro¬
cessing
Chemicals
5.2.3.1
A
minimum
of
two
0.79
mm
[0.032
in]
test
strips
per
specimen
shall
be
peeled.
For
qualification
and
conformance
four
0.79
mm
[0.032
in]
strips
per
specimen
shall
be
used.
5.2.3.2
Immerse
in
organic
stripper
as
specified
in
4.4.1
for
75
±5
seconds
at
23
±2℃
[73.4
±3.6°F]-
5.2.3.3
Dry
specimens
15
±
5
minutes
at
125
±
5
℃
[257
±
9°F]-
5.2.3.4
Immerse
in
a
solution
of
10
gr/liter
sodium
hydrox¬
ide
at
90
土
5
℃
[194
±
9°F]
for
5
±1
minutes.
5.2.3.S
Rinse
in
hot
tap
water
at
50-55℃
[1
22-1
31
°F]
for
5
±
1
minutes.
5.2.3.6
Immerse
for
30
±5
minutes
in
a
solution
of
1
0
gr/liter
sulfuric
acid
(sp.
gr.
1
.836)
and
30
gr/liter
boric
acid
solution
at
60
土
5
℃
[140
±
9°F].