IPC-TM-650 EN 2022 试验方法1.pdf - 第420页
ASTM D495 Page 1 of 2
IPC-TM-650
Number Subject Date
Revision
Page 7 of 7
2.4.54
TestMethodforThermalTransmissionPropertiesof
09/2022
MetalBasedPrintedBoards(MBPB)
N/A
6Notes
6.1
The following information should be given in the measurement report associated with the measurement. Show all measured
values and the mean value for all parameters:
6.2
General information:
6.2.1
Measurement institution
6.2.2
Testing apparatus (identification)
6.2.3
Date
6.2.4
Contact person
6.3
Specimen identification:
6.3.1
Name of the manufacturer
6.3.2
Batch or lot number
6.3.3
Grade designation
6.3.4
Nominal thickness
6.3.5
Any other information pertinent to the identification of the material
6.4
Results and thermal properties
6.4.1
Number of layers used in the test
6.4.2
Average temperature of the specimen (@ max pressure)
6.4.3
Temperature difference over the specimen (@ max pressure)
6.4.4
Pressure used during testing
6.4.5
Apparent thermal conductivity (@ max pressure)
6.4.6
Thermal resistance (@ max pressure)
6.4.7
Uncertainty of the thermal measurement (@ max pressure)
6.4.8
Layer thicknesses of top, base and dielectric layer
6.4.9
Microscopic images of the layer thicknesses
6.4.10
Used material to reduce contact resistances between meter bars and specimen
6.4.11
Assumptions of the thermal conductivity of the top and base plate to determine the thermal properties of the dielectric
layer
6.4.12
Determined thermal conductivity of the dielectric layer (@ max pressure)
6.5
The following information show how to use the values from this method for CFD simulation.
Build up a three-layer system in your simulation tool according to Figure 5. Use for upper and lower metal layer the mean value
of the thickness from microsection and the thermal conductivity of each metal layer. Use the mean value of apparent thermal
conductivity (Table 1 Equation 16) and thickness of the dielectric material.
ASTM D495
Page 1 of 2
Figure 4 Generalized Resonator Pattern Card Showing Dimensions of Table 1 and Made of Laminate Matching the
Nominal Permittivity of Material to be Tested
Figure 5 Base Stripline Board with Copper Foil and Dielectric Matching the Nominal Permittivity of the Material to be
Tested
IPC-TM-650
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