IPC-TM-650 EN 2022 试验方法-- - 第135页
IPC-TM-650 Number Subject Date Revision Page 3 of 3 2.3.10 Flammability of Laminate 12/94 B flushed out during burner ignition and flame adjustment resulting in a false yellow flame tip. Proper flame adjustment becomes v…
IPC-TM-650
Number
Subject Date
Revision
Page 2 of 3
2.3.10
Flammability
of
Laminate
12/94
B
[257
±
3.6°F],
then
cooled
in
a
desiccator
for
4
hours
mini¬
mum
prior
to
testing.
5.2.3
Reserve
sets
of
specimens
may
also
be
conditioned
concurrently
for
failure
verification
purposes.
5.3
Preparation
for
Testing
5.3.1
Adjustment
of
Test
Flame
The
burner
is
ignited
and
adjusted
to
produce
a
blue
flame
19
mm
[0.75
in]
high.
The
correct
flame
is
obtained
by
adjusting
the
gas
supply
and
the
air
ports
of
the
burner
until
a
blue
flame
with
a
yellow-
tipped
outer
cone
19
mm
[0.75
in]
high
is
produced.
The
air
supply
is
increased
slightly
by
opening
the
air
ports
only
until
the
yel¬
low
tip
just
disappears
and
completely
blue
inner
and
outer
flame
cones
are
formed.
The
flame
is
remeasured
for
correct
height.
The
procedure
is
repeated
as
necessary
until
all
con¬
ditions
are
met.
The
burner
tube
is
vertical
during
adjustment
and
testing.
(See
6.2,
6.3,
and
6.4.)
5.3.2
Specimen
Mounting
Each
specimen
is
mounted
in
the
test
fixture
with
its
longitudinal
axis
vertical.
The
clamp
used
shall
cover
no
more
than
the
upper
6.4
mm
[0.25
in]
of
the
specimen.
The
vertical
position
of
the
test
fixture/
specimen
assembly
is
adjusted
so
that
the
lower
end
of
the
specimen
is
9.5
mm
[0.375
in]
above
the
top
of
the
burner
tube.
5.4
Measurement
5.4.1
The
test
flame
is
placed
centrally
under
the
lower
end
of
the
specimen
for
10
±
0.5
seconds.
The
burner
is
with¬
drawn
from
the
specimen.
If
active
combustion
ceases
prior
to
the
specimen
being
completely
consumed,
the
test
flame
is
to
be
immediately
placed
under
the
specimen
for
an
additional
1
0
±
0.5
seconds,
then
withdrawn
as
before.
5.4.2
Evaluation
and
Report
Steps
5.5.1
,
5.5.2,
and
5.5.3
shall
be
performed
for
each
test
condition.
5.5
Recording
Data
The
following
data
is
to
be
observed
and
recorded.
5.5.1
Duration
of
specimen
burning
to
the
nearest
second
after
the
first
test
flame
application
for
each
specimen.
5.5.2
Duration
of
specimen
burning
to
the
nearest
second
after
the
second
test
flame
application
for
each
specimen.
5.5.3
Duration
of
specimen
burning
plus
glowing
to
the
nearest
second
after
the
second
test
flame
application
for
each
specimen,
only
if
required
by
the
specification.
5.5.4
If
any
specimen
burns
up
to
the
holding
clamp
on
any
ignition.
5.6
Calculation
5.6.1
Calculate
the
total
specimen
burning
time
and
the
average
burning
time
based
on
ten
ignitions
per
set
of
five
specimens.
5.6.2
Calculation
of
the
glowing
time
for
each
specimen,
if
required
by
the
specification.
5.7
Report
The
material
shall
be
reported
as
out
of
compli¬
ance
for
one
or
more
of
the
following
test
results,
unless
oth¬
erwise
specified.
5.7.1
More
than
one
specimen
per
set
burns
up
to
the
hold¬
ing
clamp
on
any
ignition.
5.7.2
More
than
one
specimen
per
set
burns
for
a
period
of
time
longer
than
allowed
by
the
specification
for
a
single
specimen.
5.7.3
The
total
specimen
burning
time
or
the
average
speci¬
men
burning
time
as
applicable
exceeds
the
maximum
allowed
by
the
specification
and
is
beyond
the
tolerance
specified
in
5.5.4.
5.7.4
More
than
one
specimen
glows
for
a
period
of
time
greater
than
allowed
by
the
specification
(when
applicable).
5.8
Retest
If
only
one
specimen
per
set
fails
to
comply
with
the
requirements,
the
reserve
set
of
specimens
shall
be
tested.
In
the
case
of
total
or
average
specimen
burning
time,
the
reserve
set
shall
be
tested
only
if
these
calculated
values
exceed
the
specification
maximum
by
five
seconds
or
less.
All
specimens
from
the
reserve
set
shall
comply
with
the
require¬
ments.
6.0
Notes
6
J
Most
laminates
covered
by
this
test
method
do
not
drip
molten
or
flaming
material,
and
therefore
provisions
for
this
evalu¬
ation
have
not
been
described.
If
necessary,
refer
to
UL-STD-94.
6.2
The
inside
of
the
burner
barrel
should
be
cleaned
fre¬
quently.
Specimen
combustion
by-products
can
collect
around
and
inside
the
barrel
tip.
These
deposits
can
be
IPC-TM-650
Number
Subject Date
Revision
Page 3 of 3
2.3.10
Flammability
of
Laminate
12/94
B
flushed
out
during
burner
ignition
and
flame
adjustment
resulting
in
a
false
yellow
flame
tip.
Proper
flame
adjustment
becomes
very
difficult.
6.3
When
the
flame
is
correct
and
the
specimens
end
is
at
the
proper
height
above
the
burner
9.5
mm
[0.375
in],
the
inner
blue
come
of
the
flame
will
just
meet
the
end
of
the
specimen.
The
specimen
will
then
be
ignited
by
the
hottest
area
of
the
flame.
6.4
Accurate
centering
of
the
flame
under
the
specimen
is
essential
for
consistent
testing.
6.5
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
IPG
Test
Methods
is
30%
maximum.
IPC-TM-650 Test Method Manual
Note:
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 4
Number
IPC-TM-650
TEST
METHODS
MANUAL
1
Scope
This
test
method
is
intended
to
evaluate
the
rela¬
tive
flame
resistance
characteristics
of
a
permanent
solder
mask
coating
on
specified
printed
wiring
laminates.
It
is
intended
for
use
on
laminate
0.5
mm
thick
and
greater.
It
should
indicate
to
what
degree,
if
any,
that
the
coating
may
diminish
the
flammability
of
the
laminate.
The
performance
level
of
a
material
by
these
methods
should
not
be
assumed
to
correlate
with
its
performance
in
end-use
applications.
2
Applicable
Documents
2
.3.6
Etching,
Ammonium
Persulfate
Method
2
.3.7
Etching,
Ferric
Chloride
Method
2.3.7.
1
Cupric
Chloride
Etching
Method
3
Test
Specimen
3.1
Test
specimens
shall
be
prepared
using
vendor
recom¬
mendations
or
manufacturers'
production
process
and
fabri¬
cated
parallel
to
either
the
warp
or
the
fill
direction
as
conve¬
nient.
3.2
Test
specimens
shall
be
130
mm
±
5
mm
in
length
and
13
mm
±
0.5
mm
in
width
by
the
thickness
being
tested.
Metal
cladding
shall
be
removed
by
etching,
using
IPC-TM-
650,
Test
Method
2.3.6, 2.3.7,
or
2.3.
7.1.
3.3
The
solder
mask
coating
shall
be
applied
evenly
at
both
the
minimum
and
maximum
anticipated
coating
thickness
over
both
the
minimum
and
maximum
laminate
thickness
desired.
3.4
All
of
these
specimen
sets,
as
well
as
one
specimen
set
of
uncoated
laminate,
for
each
laminate
thickness,
should
come
from
the
same
laminate
lots.
In
addition,
if
other
solder
masks
are
to
be
compared,
all
should
be
applied
to
the
same
lots,
or
results
can
vary
widely.
Pretesting
of
laminate
lots
is
recommended.
3.5
Edges
may
be
smoothed
after
fabrication,
providing
that
any
radius
imparted
to
the
corners
does
not
exceed
12.5
mm.
3.6
Five
specimens
shall
be
prepared
for
each
condition
required
(two
conditions
—
see
specimen
conditioning).
2.3.10.1
Subject
Flammability
of
Soldermask
on
Printed
Wiring
Laminate
Date
Revision
8/98
Originating
Task
Group
N/A
Reserve
duplicates
of
five
specimens
are
also
required
in
the
event
a
retest
is
necessary.
Total
specimens
per
set
are
there¬
fore
equal
to
20.
Total
sets
required,
including
uncoated
sub¬
strate,
would
be
six.
Additional
coatings
tests
would
not
have
to
include
the
uncoated
sets
if
the
laminate
lots
are
the
same
and
submitted
simultaneously.
4
Apparatus
4.1
Test
Chamber
A
laboratory
hood,
totally
enclosed,
with
a
heat
resistant
glass
window
for
observing
the
test,
shall
be
used.
The
exhaust
fan
shall
be
turned
off
during
the
test,
but
may
be
turned
on
periodically
to
clear
out
the
fumes
and
carbonized
airborne
particles
between
tests.
4.2
Clamping
Devices
A
clamping
device,
adjustable
for
vertical
positioning
of
the
test
specimen,
shall
be
provided
within
the
test
chamber
so
the
specimen
will
hang
with
its
length
in
a
vertical
position
approximately
coincident
with
the
central
vertical
axis
of
the
test
chamber.
4.3
Laboratory
Burner
A
Bunsen
or
Tirrell
Burner
shall
be
used
having
a
tube
length
of
100
mm
and
an
inside
diameter
of
9.4
mm
±
1.5
mm.
The
burner
shall
not
be
equipped
with
end
attachments.
4.4
Gas
Supply
The
gas
supply
shall
be
regulated
and
metered
for
uniform
flow.
The
standard
gas
shall
be
technical
grade
methane.
Natural
gas
having
a
nominal
heat
content
of
1000
BTU
per
cubic
foot
may
be
substituted.
Other
fuel
gases,
such
as
butane,
propane,
and
acetylene
may
be
used;
however,
technical
grade
methane
will
be
used
for
referee
testing.
4.5
Timing
Device
A
stop
watch
or
other
suitable
timing
device
with
a
precision
of
0.5
seconds
minimum
4.6
Desiccator
A
desiccator
containing
dried
silica
gel
or
calcium
chloride
4.7
Circulating
Oven
A
conditioning
oven
of
circulating
draft
type
capable
of
maintaining
70℃
±
1
℃