59
Extracted BVceo and Iceo
76 8
Marker at breakdown
Magnified view
Note:
Trace is jumped.
Figure 3-14. Ic-Vceo_R test results setup without a series collector resistor.
Review:
The measured VBceo is 400.4 V and Iceo at 200 V is about 68 nA. The specification
of the VBceo is minimum 350 V at 50 mA collector current condition. The actual
data is at 8 mA collector current, but it looks the VBceo is okay. The Iceo specifica-
tion is maximum 100 µA and the actual 68 nA performance is much lower than the
specification limit.
When measuring VBceo, it typically shows negative resistance characteristics, and
the measurement data show a jump from the breakdown start point to the final
point as shown in the magnified view of figure 3-14. For observing the breakdown
characteristics, a series resistor inserted between the collector terminal and the
collector SMU is effective.
The effect and result inserting a 100 kΩ resister are shown in the next section.
Figure 3-14 plots Icollector versus Vce. The VBceo and Iceo are automatically ex-
tracted at the specified condition, and the parameters are shown in the Parameters
display field.
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