IPC-TM-650 EN 2022 试验方法--.pdf - 第62页

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 vol untaril y establis hed by T echni cal Committees of the …

100%1 / 824
Figure 1 Dicy inspection set-up (expanded view)
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
inspection
method
is
designed
to
visually
inspect
for
dicyandiamide,
commonly
called
lidicy,"
that
is
not
dissolved
in
the
resin
of
prepreg
materials
in
which
it
is
used
as
a
curing
agent,
by
means
of
polarized
lighting.
2
.0
Applicable
Documents
None.
3
.0
Test
Specimens
Unless
otherwise
specified,
one
ply
of
prepreg
cut
to
101
.6
x
1
01
.6
mm
[4.0
x
4.0
in].
4
.0
Apparatus
or
Material
4.1
An
incidental
light
source
such
as
a
photographic
light
box,
light
table
or
illuminated
microscope
base.
Light
intensity
shall
be
sufficient
to
detect
small
features
of
the
specimen
under
fully
polarized
conditions,
such
as
a
60
watt
light
bulb
used
in
a
light
box.
4.2
A
matched
pair
of
polarizing
filter
lens.
4.3
A
microscope
capable
of
magnification
at
least
30X
to
100X.
5
.0
Procedure
5.1
Preparation
5.1.1
Place
one
polarizing
filter
directly
over
the
light
source.
Place
the
specimen
over
the
filter.
5.1.2
Place
second
polarizing
filter
over
the
specimen
directly
in
line
with
the
first
filter.
5.1.3
Set
microscope
to
desired
magnification
between
30X
and
100X
and
position
over
the
approximate
center
of
the
fil¬
ters.
For
referee
purposes,
magnification
shall
be
at
100X.
5.1.4
Focus
microscope
on
the
specimen
through
the
top
filter.
5.1.5
Rotate
top
filter
90°
from
bottom
filter
(see
Figure
1).
5.2
Evaluation
5.2.1
Examine
for
the
presence
of
dicy
over
the
entire
speci¬
men,
excluding
the
edges.
The
dicy
(if
present)
will
cause
scattering
of
the
polarized
light
which
can
then
pass
through
the
second
filter
in
sufficient
intensity
to
be
visible.
Number
2.1.10
Subject
Visual
Inspection
for
Undissolved
Dicyandiamide
Date
12/94
Revision
A
Originating
Task
Group
MIL-P-13949
Test
Methods
Task
Group
(7-1
1b)
5.2.2
Careful
scrutiny
must
be
used
to
eliminate
consider¬
ation
of
dust
or
cracks
in
the
resin
as
dicy,
because
they
will
also
diffuse
polarized
light.
Severe
incidence
of
undissolved
dicy
may
be
observed
using
partially
or
non-polarized
light.
5.3
Report
Presence
of
dicy
shall
be
noted
as
per
the
degrees
shown
in
Appendix
A.
Appearance
as
to
the
form,
i.e.,
crystal,
flake,
or
cluster,
shall
be
reported.
6
.0
Notes
6.1
Dicy
is
a
curing
agent
used
with
epoxy
resin;
it
is
intro¬
duced
at
the
resin
mixing
stage.
If
the
mix
is
not
homoge¬
neous
or
is
improperly
done,
particles
of
dicy
may
not
dissolve
or
may
be
recrystallized.
Dicy
may
also
recrystallize
during
the
treating
operation.
During
lamination
of
the
prepreg,
dicy
may
contribute
to
the
formation
of
voids
or
other
defects.
6.2
Dicy
Flake
A
loose
mass
of
crystals,
usually
in
the
form
of
crystals
radiating
from
a
center
point.
6.3
Dicy
Cluster
A
concentration
of
crystals
or
flakes.
WgJ
—
Visual
Examination
Magnification
30X-100X
—
Prepreg
一，三
［:酬
E
：
成正州
mUMvK
Polarizing
Filter
Turned
90°
See
paragraph
5.1.6
绊
L
中
P
小公1
Light
Source
m
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
.0
Scope
This
test
method
identifies
the
major
areas
of
concern
during
a
visual
examination
and
describes
the
recom¬
mended
procedures.
2
.0
Application
Documents
None.
3
.0
Test
Specimen
Any
representative
clad
or
unclad
sample
of
printed
wiring
material.
4
.0
Equipment/Apparatus
Magnifier
or
microscope
capable
of
up
to
30X
magnification,
having
a
reticle
capable
of
measuring
to
the
nearest
0.001
in.
5
.0
Procedures
5.1
Pinholes
Pinholes
are
predetermined
by
visual
exami¬
nation
using
not
less
than
10X
magnification
on
the
specimen.
Copper
surfaces
should
be
prepared
by
cleaning
or
light
etch¬
ing.
5.2
Pits
and
Dents
The
maximum
total
point
count
for
pits
and
dents,
per
square
foot
of
panel
inspected
is
determined
as
follows:
Longest
Dimension
(inch)
Point
Value
0.000
to
0.010
inclusive
1
0.
01
1
to
0.020
inclusive
2
0.021
to
0.030
inclusive
4
0.031
to
0.040
inclusive
7
over
0.040
30
Number
2.1.5
Subject
Surface
Examination,
Unclad
and
Metal-Clad
Material
Date
12/82
Revision
A
Originating
Task
Group
N/A
5.3
Scratches
Scratches
can
be
measured
with
the
use
of
a
microscope
(30X
maximum).
5.4
Wrinkles
Wrinkles
should
be
viewed
by
normal
or
cor¬
rected
20/20
vision.
5.5
Inclusions
Inclusions
should
be
measured
using
18X
to
30X
magnification.
6
.0
Notes
For
additional
reference
see:
IPC-CF-150:
Copper
Foil
IPC-A-600:
Acceptability
of
Printed
Boards
MIL-P-1
3949:
Laminate
Materials
Pits
and
dents
should
be
determined
visually
using
not
less
than
10X
magnification
on
the
specimen.
FED-STD-191
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
.0
Scope
This
method
is
designed
to
determine
the
thick¬
ness
of
woven
glass
fabric,
such
as
E-glass,
S-glass,
and
quartz,
used
as
reinforcement
in
prepreg
(resin-impregnated
glass
fabric,
or
B-stage).
It
is
applicable
for
glass
fabric
inspection
before
and
after
impregnation.
2
.0
Applicable
Documents
3
.0
Test
Specimens
3.1
Size
Specimen
size
of
101
.6
x
1
01
.6
mm
[4.0
x
4.0
in]
is
recommended;
specimens
used
for
determination
of
resin
content
by
Burn
Off
Method
may
be
used.
Specimens
shall
be
of
sufficient
size
to
insure
that
all
points
of
the
pressure
foot
of
the
thickness
gauge
shall
be
at
least
6.4
mm
[0.25
in]
from
the
edge
of
the
specimen.
3.2
Quantity
and
Sampling
Unless
otherwise
specified,
three
pieces
of
material
shall
be
cut
one
each
from
three
sample
sheets.
Specimens
shall
be
cut
with
the
edges
on
a
bias
to
the
orientation
of
the
fabric.
Specimens
shall
be
free
of
folds,
creases,
knots
or
other
distortions
which
are
not
repre¬
sentative
of
the
material
surface.
4
.0
Apparatus
or
Material
4.1
Muffle
furnace
Muffle
furnace
that
is
capable
of
main¬
taining
550
+/-50℃
[1022
±90°F]-
4.2
Thickness
Gage
(Dead
weight
type)
A
dead
weight
type
thickness
gage
equipped
with
a
dial
graduated
to
read
with
a
precision
of
0.0025
mm
[0.0001
in]
shall
be
used.
The
pressure
foot
shall
be
circular
with
a
diameter
of
6.35
±0.025
mm
[0.25
±0.001
in],
and
with
the
moving
parts
weighted
to
apply
a
total
load
of
173
±14
kPa
(25
±2
psi)
to
the
specimen.
The
anvil
shall
be
not
less
than
6.35
mm
[0.250
in]
in
diameter.
The
micrometer
shall
be
capable
of
repeating
its
readings
to
0.0013
mm
[0.00005
in]
at
zero
setting
or
on
a
steel
gage
block.
Number
2.1.6
Subject
Thickness
of
Glass
Fabric
Date
Revision
12/94
B
Originating
Task
Group
MIL-P-13949
Test
Methods
Task
Group
(7-1
1b)
5.0
Procedure
5.1
Preparation
of
Prepreg
Specimens
Place
specimens
in
a
muffle
furnace
at
550±50℃
[1022
±90°
F],
for
a
period
of
time
necessary
to
assure
complete
removal
of
the
organics
(resin).
After
removal
from
the
muffle
furnace,
the
specimens
shall
be
cooled
to
room
temperature.
5.2
Thickness
Determination
The
specimen
shall
be
placed
on
the
thickness
gauge
anvil,
and
the
pressure
foot
shall
be
closed
onto
the
specimen
at
a
location
outside
the
area
to
be
measured.
The
pressure
foot
shall
be
backed
off
to
a
distance
of
0.008
to
0.01
mm
[0.0003
to
0.0004
in],
the
specimen
moved
to
the
measurement
position,
and
the
pres¬
sure
foot
then
released
onto
the
specimen.
The
pressure
foot
shall
be
allowed
to
rest
there
for
a
minimum
of
5
seconds.
The
dial
reading
shall
then
be
taken
to
the
nearest
0.0025
mm
[0.0001
in].
5.3
Evaluation
Record
each
reading
and
report
the
average
of
three
measurements
to
the
nearest
0.025
mm
[0.001
in].
6.0
Notes
See
Federal
Test
Method
Standard
No.
191,
Method
No.
5050
for
additional
information
and
background
on
this
procedure.