IPC-TM-650 EN 2022 试验方法.pdf - 第349页
T able 1 T est Report on Solder Paste Enter appropriate information in top portion of report and complete report by entering the test results or checkmarks in the appropriate spaces. Inspection Purpose: QPL I.D. Number: …
1.0
Scope
This
test specifies a standard procedure for
determining the viscosity of solder paste in the range of
50,000 to 300,000 centipoise.
2.0
Applicable Documents
None
3.0
Test Specimen
Paste
to be tested shall be stabilized
at 25°C ± 1°C for a minimum of 24 hours prior to testing. The
paste volume shall be sufficient to fill the viscometer recep-
tacle to about 60% of its depth.
4.0
Equipment/Apparatus
The
equipment used shall be a
spiral pump viscometer (Malcom, Brookfield Viscometer or
Rheometer with Spiral Adaptor accessory, or equivalent). Set
the instrument rotational speed for 10 rpm. Other equipment
may be used provided the results can be empirically corre-
lated as mutually agreed upon. Additional shear rates may be
specified by the user or supplier.
5.0
Procedure
5.1 Preparation
5.1.1
Open
the container(s), remove any internal cover,
scrape off paste adhering to the lids or internal cover(s) and
the container wall(s) and add this to the paste in the contain-
er(s).
5.1.2
Using
a spatula, stir the paste gently for 1 to 2 minutes
to homogenize it, taking care to avoid the introduction of air.
5.1.3
Transfer
sufficient paste to the viscometer receptacle
to fill this to about 60% of its depth. Place the receptacle in
the temperature controlled unit on the viscometer and allow it
to stabilize at 25 ± 0.25°C for 15 minutes minimum and 15
minutes maximum.
5.2
Test
5.2.1
Immerse the instrument sensor into the sample in
accordance with the equipment manufacturer’s instructions.
The solder paste shall not cover the pump outlet.
5.2.2 Turn
on chart recorder and set instrument to run at
one specific shear rate. Take reading when output has been
stable for at least 1 minute.
5.3
Evaluation
Record
data in Table 1 ‘‘Test Report on
Solder Paste.’’
6.0
Notes
6.1 Test Equipment Sources
The
equipment sources
described below represent those currently known to the
industry. Users of this test method are urged to submit addi-
tional source names as they become available, so that this list
can be kept as current as possible.
6.1.1
Spiral Pump Viscometer Equipment
Brookfield
Engineering Laboratories, Inc.
240 Cushing Street
Stoughton, MA 02072
(617) 344-4310
Malcom Instruments Corp.
26226 Industrial Blvd.
Hayward, CA 94545
(510) 293-0580
(510) 293-0584 - fax
The
Institute for Interconnecting and Packaging Electronic Circuits
2215 Sanders Road • Northbrook, IL 60062-6135
IPC-TM-650
TEST
METHODS MANUAL
Number
2.4.34.3
Subject
Solder
Paste Viscosity—Spiral Pump Method
(Applicable at Less Than 300,000 Centipoise)
Date
1/95
Revision
Originating Task Group
Solder Paste Task Group (5-24b)
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.
P
age1of2
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T
able 1 Test Report on Solder Paste
Enter appropriate information in top portion of report and complete report by entering the test results or checkmarks in the appropriate spaces.
Inspection Purpose: QPL I.D. Number:
__
Qualification Manufacturer’s Identification:
__ Quality Conformance A Manufacturer’s Batch Number:
__
Quality Conformance B Date of Manufacture:
__
Shelf-Life Extension Original Use-By Date:
__
Performance Revised Use-By Date:
Date
Inspection Completed:
Overall
Results: __ Pass __ Fail
Inspection Performed by:
W
itnessed by:
Inspections
User’s
Actual
Requirement Test Result P/F (*) Tested by & Date
Material
Visual
Metal Content
Viscosity
Solder Ball
Slump
Alloy
Flux
Powder Size
% In Top Screen
% In Next Screen
% In Bottom Screen
% In Receiver Bottom
Max. Powder Size
Powder Shape
Tack
Wetting
* P/F = PASS/FAIL; enter P if test results are within tolerance of actual requirement; otherwise, enter F
IPC-TM-650
Number
2.4.34.3
Subject
Solder
Paste Viscosity—Spiral Pump Method (Applicable at Less
Than 300,000 Centipoise)
Date
1/95
Revision
P
age2of2
电子技术应用 ｗｗｗ．ＣｈｉｎａＡＥＴ．ｃｏｍ
1.0
Scope
This
test method is designed to measure the
viscosity of paste flux.
2.0
Applicable Documents
None
3.0
Test Specimen
Enough
paste flux to fill a container
with a minimum diameter of 4 cm to a minimum depth of
approximately 10 cm.
4.0
Apparatus and Reagents
4.1
Brookfield
RVT viscometer or equivalent with helipath
stand and a TC spindle.
4.2
Water
bath capable of holding 25 +/-0.5°C.
4.3
Stopwatch
4.4
Spatula
5.0
Procedure
5.1
Test
5.1.1
Place
container of paste flux in water bath at 25+/-
0.5°C.
5.1.2
When
medium has attained thermal equilibrium, place
container under spindle so that it is at center of surface.
5.1.3
Start
the Brookfield at 5 revolutions per minute and
start the Helipath stand on descend.
5.1.4
Two
minutes after the spindle has cut into the top sur-
face of the medium, record the value. Check that spindle is
not touching bottom of container.
5.1.5
Remove
spindle from the paste flux. Using spatula, stir
the flux vigorously for 15 to 20 seconds and remeasure
viscosity.
5.2
Expression of Results
The
viscosities are calculated
from the values recorded after 2 minutes of medium penetra-
tion. Both stirred and unstirred results should be quoted.
6.0
Notes
6.1 Safety
Observe all appropriate precautions on MSDS
for chemicals involved in this test method.
The
Institute for Interconnecting and Packaging Electronic Circuits
2215 Sanders Road • Northbrook, IL 60062-6135
IPC-TM-650
TEST
METHODS MANUAL
Number
2.4.34.4
Subject
Paste
Flux Viscosity − T-Bar Spindle Method
Date
1/95
Revision
Originating Task Group
Flux Specifications Task Group (5-24a)
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.
P
age1of1
电子技术应用 ｗｗｗ．ＣｈｉｎａＡＥＴ．ｃｏｍ