IPC-TM-650 EN 2022 试验方法--.pdf - 第738页
5 Data Reporting 5.1 Report bot h percent values calculated in sections 3.6.1 and 4.4.1. Th e Service Temperature value, in uni ts o f °C, be based upon the lesser of the t wo reported percent values c alculated in secti…
3.6.2
Report the results of the visual examination evaluation
in 3.4.9.
4
Dielectric Strength Using ASTM D-149 Test Procedure
4.1 Specimen Preparation
4.1.1
Prepare a specimen of the metal-clad flexible base
material large enough [approximately 400 mm x 500 mm
[approx. 16 in x 20 in]] to prepare at least twelve test speci-
mens each of 80 mm x 80 mm [approx. 3.0 in x 3.0 in]. Cover
materials
be prepared per 3.2. Adhesive bonding films
be prepared per 3.3 where copper foil is used on both
sides of the adhesive bonding film.
4.1.2
Remove (etch) all metal from both surfaces of the
400 mm x 500 mm [approx. 16 in x 20 in] specimen by stan-
dard industry practice. Rinse the etched material thoroughly.
Cut the minimum of twelve test specimens to their nominal
size of 80 mm x 80 mm [approx. 3.0 in x 3.0 in].
4.2 Conditioning and Aging Procedure
4.2.1
After generating the minimum of twelve specimens as
described in 4.1.1, all specimens
be subjected to a sta-
bilization period of a minimum of 24 hours at 23 °C ± 2 °C
[73.4 °F ± 3.6 °F] and 50% RH ± 5% RH.
4.2.2
Examine at least twelve specimens using normal or
corrected 20/20 (also termed 6/6 or 1.0) vision, and record
any presence of any wrinkles, cracks or blisters. Discard those
specimens showing the presence of any wrinkles, cracks or
blisters.
4.2.3
Six specimens examined in 4.2.2 be placed into
an air-circulating oven at the desired Service Temperature
value. The oven temperature
be held at a tolerance of ±
3 °C [± 5.4 °F]. The specimens are to continuously remain in
the oven for 1000 hours, -0 hours / +12 hours.
4.2.4
After being oven-conditioned as described in 4.2.3,
the test specimens
be cooled to room temperature at
standard ambient laboratory conditions. After being cooled to
room temperature, the oven-conditioned specimens
be
subjected to a stabilization period of a minimum of 24 hours
at 23 °C ± 2° C [73.4 °F ± 3.6 °F] and 50% ± 5% RH.
4.2.5
After the stabilization period in 4.2.4, examine the six
specimens that had been subjected to the oven- conditioning
using normal or corrected 20/20 (also termed 6/6 or 1.0)
vision, and record the presence of any wrinkles, cracks or
blisters.
4.3 Measurement of Dielectric Strength
4.3.1
The six specimens that were not subjected to the
oven-conditioning in 4.2.3
be subjected to the dielectric
strength test per ASTM D-149. (These measurements
be considered the ‘‘as-received’’ dielectric strength values.)
4.3.2
The ‘‘thermally aged’’ (oven-conditioned) specimens
examined in 4.2.5
be tested for dielectric strength
according to the conditions outlined in 4.3.1. (These measure-
ments
be considered the ‘‘thermally-aged’’ dielectric
strength values.)
4.4 Evaluation of Results
4.4.1
Calculate the average dielectric strength of the six
‘‘as-received’’ specimens as measured in 4.3.1. Calculate the
average dielectric strength of the six ‘‘thermally aged’’ speci-
mens as measured in 4.3.2. Calculate the ratio of the average
value of the ‘‘thermally aged’’ dielectric strength divided by
the average value of the ‘‘as-received’’ dielectric strength to
determine the percentage retention of dielectric strength.
Record this number to ± 1% accuracy.
[Ave. of Six (6) Diel. Strengths of ‘‘Thermally Aged’’ Specimens]
[Ave. of Six (6) Diel. Strengths of ‘‘As Received’’ Specimens
x 100 = % of Dielectric Strength Retained
Number
2.6.21
Subject
Service Temperature of Metal-Clad Flexible Laminate, Cover
Material and Adhesive Bonding Films
Date
6/11
Revision
B
IPC-TM-650
shall
shall
shall
shall
shall
shall
shall
shall
shall
Page
4
of
5
5 Data Reporting
5.1
Report both percent values calculated in sections 3.6.1
and 4.4.1. The Service Temperature value, in units of °C,
be based upon the lesser of the two reported percent
values calculated in sections 3.6.1 and 4.4.1.
6 Notes
6.1
For specimen preparation, test results may vary
between specimens where the copper remains and those that
have had the copper removed from the nontest side. If the
flexible base material is supplied as single-clad and double-
clad, both must be tested.
6.2
For specimen preparation, test results may vary for the
same flexible base material, depending whether it is tested as
single- or double-clad.
6.3
Suitable procedures must be used to ensure that solder
does not remain on the test specimens after solder float.
6.4
For flexible base materials other than polyimide, the tem-
perature of the solder pot may be other than 288 °C [550 °F],
AABUS.
Number
2.6.21
Subject
Service Temperature of Metal-Clad Flexible Laminate, Cover
Material and Adhesive Bonding Films
Date
6/11
Revision
B
IPC-TM-650
shall
Page
5
of
5
Note:
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 3
IPC-TM-650
TEST
METHODS
MANUAL
1
.0
Scope
This
test
procedure
measures
the
temperature
repeatability
inside
steam
agers
used
to
condition
compo¬
nents
prior
to
solderability
testing.
It
should
be
applied
at
installation
and
after
any
modification
to
the
equipment
and/or
its
location.
2.0
Applicable
Documents
IPC-PC-90
General
Requirements
for
Implementation
of
Statistical
Control
MIL-STD-202
Test
methods
for
Electronics
and
Electrical
Components
Parts
MIL-STD-750
Test
Methods
for
Semiconductor
Devices
MIL-STD-883
Test
Methods
of
Microelectronics
MIL-STD-45662
Calibration
Systems
Requirements
ANSI/ASQC
Z1.1
Guide
for
Quality
Control
Charts
ANSI/ASQC
Z1.2
Control
Chart
Method
of
Analyzing
Data
ANSI/ASQC
Z1.3
Control
Chart
Method
of
Controlling
Quality
During
Production
ANSI/J-STD-002
Solderability
Tests
for
Components
Leads,
Terminations,
Lugs,
Terminals
and
Wires
3.0
Test
Specimens
None
required
4
.0
Apparatus
The
following
test
equipment
shall
be
used
during
the
tests:
4.1
Type
T
copper-constantan
thermocouple
wire,
24
AWG,
±0.5℃
[±0.09°F]
accuracy
minimum,
premium
grade.
PTFE
insulation
is
preferred.
4.2
Thermocouple
Temperature
Indicator,
with
an
accuracy
of
±0.5℃
[±0.9°F]
minimum,
with
capability
for
type
T
thermo¬
couples,
and
be
calibrated
in
accordance
with
MIL-
STD-
45662
or
the
equivalent.
It
is
recommended
that
the
thermocouple
indicator
have
capability
to
log
data
and
be
able
to
take
all
readings
within
2
minutes.
Number
2.6.23
Subject
Test
Procedure
for
Steam
Ager
Temperature
Repeatability
Date
Revision
7/93
Originating
Task
Group
Since
readings
must
be
taken
periodically,
it
is
recommended
that
the
indicator
have
capability
for
pre-settable
time
delay
between
measurements.
Although
the
specific
equipment
used
to
develop
this
method
was
as
specified
above,
other
thermocouple
types
and
temperature
indicators
may
be
used
provided
the
require¬
ments
of
5.1
are
met.
4.3
Hot
plate
with
500
ml
glass
beaker
4.4
The
steam
ager
as
used
to
perform
component
solder¬
ability
testing
per
MIL-STD-202,
Method
208;
MIL-STD-883,
Method
2003;
or
MIL-STD-750,
Method
2026;
or
ANSI/J-
STD-002
as
applicable.
5.0
Test
Procedure
5.1
Thermocouple
Calibration
All
thermocouples
to
be
used
during
the
steam
ager
test
shall
first
be
checked.
Loosely
bundle
the
thermocouples
and
place
in
a
500
ml
glass
beaker
of
vigorously
boiling
water,
heated
by
a
hot
plate.
Measure
the
temperature
indicated
by
each
thermocouple.
All
thermocouples
should
indicate
the
same
temperature
±0.5℃
[±0.9°F]
to
the
local
boiling
point
of
water.
If
any
thermocouple
differs
by
more
this
amount,
the
weld
bead
shall
be
reworked
(and
all
thermocouples
reverified),
or
the
thermocouple
shall
be
discarded
for
the
purpose
of
this
test.
5.2
Install
Thermocouples
Install
the
thermocouples
in
the
ager
at
the
component
level.
All
thermocouple
weld
beads
shall
be
at
the
same
height
±6.35
mm
[±0.25
in].
The
distance
from
the
weld
to
the
water
shall
be
measured
prior
to
the
test.
All
thermocouples
shall
be
at
least
25.4
mm
[1
in]
away
from
any
wall
or
bulkhead.
The
thermocouples
should
be
distrib¬
uted
evenly
around
the
normal
working
area
inside
the
ager,
and
the
location
shall
be
recorded.
Ten
thermocouples
shall
be
used
in
larger
agers,
eight
in
smaller
agers.
For
example,
if
the
ager
uses
five
small
drawers,
a
thermocouple
centered
in
the
front
and
back
halves
of
the
drawer
would
be
sufficient.
If
no
drawers
are
used,
the
thermocouples
should
be
distrib¬
uted
around
the
areas
where
parts
are
usually
placed.