IPC-TM-650 EN 2022 试验方法1.pdf - 第82页
Thickness Mean (mils) Microns Standard Deviation (mils) Microns Profile Factor Mean (mils) Microns Standard Deviation (mils) Micron s IPC-TM-650 Number Subject Date Revision Page 2 of 2
IPC-TC-500
NOTE:
Figure 1 Resistance Calculation of Plated-Through
Connection
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Thickness
Mean
(mils)
Microns
Standard
Deviation
(mils) Microns
Profile
Factor
Mean
(mils) Microns
Standard
Deviation
(mils) Microns
IPC-TM-650
Number
Subject Date
Revision
Page 2 of 2
Figure 2A Circuit for Resistance Measurements
Figure 2B Ideal Probe Placement on Pad
IPC-TM-650
Number
Subject Date
Revision
Page 2 of 4