IPC-TM-650 EN 2022 试验方法--.pdf - 第158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 …
Caution: Perform all work in a hood,
since vapors given off are toxic. Chemical goggles, com-
pletely enclosing the eyes, should be worn and eye wash
facilities should be readily available.
IPC-TM-650
Page 2 of 2
Number
2.3.24.2
Subject
Porosity
of
Metallic
Coatings
on
Copper-Base
Alloys
and
Nickel
(Nitric
Acid
Vapor
Test)
Date
8/97
Revision
A
Remove
the
part
from
the
desiccator
and
immediately
transfer
it
to
an
oven
at
125℃
for
30
minutes.
Remove
and
inspect
the
part
with
10
power
magnification
using
the
collimated
incandescent
light
source
arranged
so
that
the
light
beam
strikes
the
surface
being
examined
at
an
angle
of
less
than
1
5
degrees.
The
presence
of
blue,
green,
or
bluish-white
protru¬
sions
indicates
that
the
coating
is
discontinuous
(i.e.,
porous,
scratched,
etc.)
at
these
spots.
The
acceptable
number,
sizes,
and
location
of
these
protrusions
shall
be
as
specified
on
the
appropriate
drawing
or
specification.
3.2
Method
2
(Extended
Nitric
Acid
Vapor-Gold
on
Copper)
Procedure
This
method
is
an
extension
of
method
1
and
may
be
used
only
after
the
test
specimen
has
passed
the
requirements
of
the
visual
examination
with
the
collimated
light
source.
The
method
permits
the
determination
of
the
actual
sizes
of
the
larger
pores.
The
inspection
should
be
per¬
formed
as
indicated
below.
After
examining
the
oven-dried
test
specimen
in
accordance
with
Method
1
,
brush
the
corrosion
products
from
the
speci¬
men.
Inspect
the
area
where
the
corrosion
products
appeared
at
a
magnification
that
permits
measurements
of
the
largest
dimensions
of
the
discontinuities
with
reasonable
accuracy.
The
acceptable
distribution
of
pore
sizes
shall
be
as
specified
on
the
appropriate
drawing
or
specification.
3.3
Method
3
(Nitric
Acid
Vapor-Gold
on
Nickel)
3.3.1
Apparatus
The
apparatus
described
in
methods
1
and
2.
3.3.3
Procedure
Use
the
procedure
for
Method
1
up
to
removal
from
nitric
acid
vapors.
At
the
end
of
the
one
hour
exposure
to
the
nitric
acid
vapors,
remove
the
part
from
the
desiccator
and
immediately
dip
it
in
the
1
0
percent
by
weight
sodium
hydroxide
solution
for
25
to
30
seconds
at
room
temperature.
Rinse
the
part
with
water
and
then
dip
it
for
25
to
30
seconds
in
the
polysulfide
reagent
at
room
temperature.
Then
rinse
it
in
water
and
dry
using
fil¬
tered
compressed
air
(gage
pressure
less
than
207
kPa).
Inspect
the
part
at
10
power
magnification.
The
presence
of
black
corrosion
products
is
evidence
of
porosity.
The
accept¬
able
number,
sizes,
and
locations
of
pores
shall
be
as
speci¬
fied
on
the
appropriate
drawing
or
specification.
3.4
Polysulfide
Reagent
Makeup
Dissolve
sodium
sulfide
crystals
in
water
until
solution
is
saturated.
Add
excess
flow¬
ers
of
sulfur
(more
than
250
grams
per
1000
ml).
Stir
and
allow
solution
to
stand
24
hours.
Filter
and
dilute
with
water
to
a
specific
gravity
of
1
.142
at
room
temperature
as
defined
in
ASTM
Designation
E
41
.
The
solution
should
be
a
red-orange
color.
To
check
reagent
effectiveness,
dip
a
clean
copper
or
high
(more
than
95
percent)
copper
alloy
specimen
into
the
reagent
at
room
temperature
as
defined
in
ASTM
Designation
E
41
.
It
shall
blacken
within
1
0
seconds.
3.3.2
Reagents
Nitric
acid,
69.0
to
71
.0
percent
HN03.
Sodium
Hydroxide
10
percent
by
weight
solution.
Polysulfide
reagent.
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 3
IPC-TM-650
TEST
METHODS
MANUAL
Number
2.3.17.2
Subject
Resin
Flow
of
“N。
Flow”
Prepreg
Date
8/97
Revision
B
Originating
Task
Group
MIL-P-13949
Test
Methods
Task
Group
(7-1
1b)
1
.0
Scope
This
test
method
is
designed
to
measure
the
Resin
Flow
of
“no
flow"
prepreg
used
for
bonding
and
adhe¬
sion
without
formation
of
resin
bead
as
caused
by
flow
of
the
resin.
2
.0
Applicable
Documents
None
3
.0
Test
Specimens
3.1
Size
and
Configuration
A
specimen
shall
consist
of
multiple
plies
of
prepreg
cut
approximately
102
mm
[4.0
in]
x
102
mm
[4.0
in].
If
the
reinforcement
is
a
continuous
fiber
woven
fabric,
the
sides
shall
be
cut
on
a
bias
to
the
fabric
weave.
Unless
otherwise
specified,
the
test
specimen
shall
have
three
plies.
3.2
Quantity
and
Sampling
Unless
otherwise
specified,
the
number
of
specimens
tested
shall
be
as
follows:
For
quali¬
fication
testing,
3
specimens
shall
be
tested,
with
the
pieces
for
each
taken
from
areas
of
the
prepreg
that
represents
the
center
and
both
edges
of
the
material
as
impregnated.
For
lot
testing,
one
specimen
shall
be
tested,
with
the
pieces
ran¬
domly
taken
from
the
prepreg.
Pieces
shall
be
taken
no
less
than
25.4
mm
[1.0
in]
from
the
impregnated
edge.
4
.0
Apparatus
or
Material
4.1
Laminating
Press
Unless
otherwise
specified,
a
lami¬
nating
press
capable
of
maintaining
at
a
temperature
of
171
±
2.8℃
[340
±
5°F]
and
capable
of
providing
a
pressure
of
1
380
土
70
kPa
[200
土
10
psi]
on
the
test
sample,
see
6.1
4.2
Hole
Punch
Hole
cutting
tool,
such
as
a
hole
punch
or
die
set
capable
of
cutting
a
25.4
±
1
.3
mm
[1
.0
土
0.05
in]
hole.
4.3
Materials
4.3.1
Release
material
shall
be
Tedlar
type
(polyvinyl
fluo¬
ride,
PVF),
or
equivalent,
of
0.05
mm
[0.002
in]
thickness,
maximum,
at
least
as
large
as
the
size
of
the
caul
plates.
4.3.2
Any
copper-clad
laminate
of
thickness
between
0.25
mm
[0.010
in]
and
0.38
mm
[0.0151
in]
shall
be
cut
to
approximately
152
mm
x
152
mm
[6.0
in
x
6.0
in].
4.3.3
Conformal
press
pad
material
equivalent
to
0.5
mm
[0.020
in]
cotton
linter
paper,
and
cut
to
approximately
152
mm
x
152
mm
[6.0
in
x
6.0
in].
4.4
Measuring
Microscope
Bausch
and
Lomb,
model
SUB-73
stereozoom
microscope
with
31-16-08
micrometer
disc,
Carl
Zeiss
Stage
Micrometer,
or
equivalent.
4.5
Caul
Plates
Caul
plates
shall
be
3.2
mm
[0.125
in]
thick
and
152
mm
[6.0
in]
square
and
made
from
type
304
steel,
or
equivalent.
4.6
Desiccator
Desiccation
chamber
capable
of
maintain¬
ing
an
atmosphere
of
less
than
30%
RH,
at
23℃
[73°F]-
5
.0
Procedure
5.1
Specimen
Preparation
5.1.1
The
prepreg
shall
be
cut
to
conform
with
the
speci¬
men
size
and
configuration
as
per
3.1
.
5.1.2
If
testing
is
to
be
performed
more
than
10
minutes
after
the
prepreg
has
been
manufactured,
specimens
shall
be
desiccated
for
4
±
1/4
hrs.
prior
to
testing.
5.1.3
Cleaning
of
Copper
Cladding
When
applicable
for
referee
purposes,
clean
the
metallic
cladding
on
the
copper
clad
laminate
by
wiping
the
copper
cladding
with
isopropyl
alcohol.
The
copper
clad
laminate
shall
be
immersed
in
suit¬
able
container
containing
22-23°
BAUME
20
percent
by
vol¬
ume
solution
of
hydrochloric
acid,
technical
grade,
maintained
at
21
±
5.6℃
[170°F
±
10°F]
for
a
period
of
15
seconds.
After
removal
of
the
copper
clad
laminate
from
the
hydrochlo¬
ric
acid,
the
copper
cladding
then
shall
be
rinsed
with
a
cold
water
spray
rinse
for
5
seconds
and
blown
dry
with
filtered,
oil
free,
compressed
air.
5.2
Measurement
5.2.1
A
specimen
shall
be
formed
by
stacking
three
plies
of
prepreg
with
the
grain
of
the
reinforcement
aligned
in
the
same
direction.
Only
if
necessary
to
prevent
ply
slippage,
tack
the
three
plies
together
using
a
standard
soldering
iron
within
one
quarter
inch
from
one
or
more
corners
so
that
the
plies
IPC-TM-650
Number
Subject Date
Revision
Page 2 of 3
8/97
2.3.17.2
Resin
Flow
of
uNo
Flow”
Prepreg
B
lay
flat
to
one
another.
Using
a
25.4
mm
[1.0
in]
diameter
hole
punch,
cut
2
holes
at
least
25.4
mm
[1.0
in]
apart
(See
Figure
1)
in
approximately
the
middle
of
the
specimen.
Caution
should
be
taken
during
cutting
in
order
to
prevent
any
loose
fibers
from
protruding
into
the
clearance
hole.
Measure
the
diameter
of
each
hole
in
3
places,
each
approximately
60°
radial
angle
from
the
others
and
determine
the
average
diam¬
eter
of
the
holes.
5.2.2
Place
the
stack
onto
and
in
the
middle
of
a
1
52
mm
x
152
mm
[6.0
in
x
6.0
in]
copper
clad
laminate
of
thickness
between
0.25
mm
[0.010
in]
and
0.38
mm
[0.015
in]
thick
and
cover
the
stack
with
a
sheet
of
release
film.
Over
the
release
film
place
2
pieces
press
pad
material.
For
referee
purposes,
the
surface
of
the
copper
cladding
shall
be
cleaned
immedi¬
ately
prior
to
lay-up
using
the
procedure
in
paragraph
5.1
.3.
(The
cleaning
is
to
standardize
the
surface
against
which
the
resin
will
flow.)
5.2.3
Place
the
stack
(specimen
plus
laminate,
release,
and
padding)
between
the
two
caul
plates.
Load
the
stack
into
the
laminating
press
maintained
at
1
7
1
°
±
2.8℃
[340°
±
5°F]
and
close
immediately
to
1380
±
70
kPa
[200
±
10
psi].
After
holding
at
full
pressure
for
20
minutes,
minimum,
release
the
pressure
and
remove
the
package.
5.3
Evaluation
After
the
package
has
cooled
to
room
temp,
measure
the
diameter
of
the
punched
holes
at
the
point
of
maximum
and
minimum
diameter
as
formed
by
the
resin
flow.
Subtract
the
average
diameter
of
holes
obtained
in
5.2.1
from
the
maximum
and
minimum
diameters.
5.4
Report
The
results
shall
be
reported
including
the
fol¬
lowing:
1.
Identification
of
specimens
tested.
2.
Resin
flow,
for
each
specimen
tested
in
terms
of
the
maxi¬
mum
flow
and
minimum
flow
in
millimeters
(thousands
of
an
inch)
for
both
die-cut
holes.
6.0
Notes
6.1
Agreement
between
supplier
and
user
other
than
that
specified
in
4.1
may
be
necessary
for
specific
resin
chemistries.
6.2
Desiccator
Conditions
The
Test
Methods
Task
Group
determined
that
a
great
majority
of
test
laboratories
are
unable
to
consistently
hold
the
Relative
Humidity
in
a
desiccator
to
less
than
20%.
Based
on
data
from
participating
company
lab
management,
the
lowest
practically
feasible
RH
for
use
with
the
affected
IPC
Test
Methods
is
30%
maximum.