System SourceMeter® Instrument Reference Manual Section 7:
2600BS-901-01 Rev. B / May 2013 7-101
i_leakage_measure()
This KIHighC factory script function performs a current leakage measurement after stepping the output voltage.
Type TSP-Link accessible
Affected by Where saved Default value
Usage
imeas = i_leakage_measure(smu, levelv, limiti, sourcedelay, measurei, measuredelay)
System SourceMeter
instrument channel (for example, smua refers to SMU
Voltage level to step to when this function is called
Current limit setting for the voltage step
Delay to wait before lowering the current limit for measurement
Current limit (and measure range); note the current limit is lower at this level and
because high-capacitance mode is active, the measure range will follow
Delay to wait after lowering the current limit before taking the measurement
Details
This function causes the smu to:
• Change its current limit to limiti with a voltage output of levelv for sourcedelay time, and then
changes its current limit to measurei (that also changes the measurement range to measurei) for
measuredelay time
• When measuredelay time expires, a measurement is taken and returned as imeas.
When measuring leakage current:
• Charge the capacitor before calling this function (the instrument's output is usually at a nonzero voltage
before calling this function; when measuring leakage, this function does not charge the capacitor).
• Set levelv = 0
Example
smua.source.highc = smua.ENABLE
smua.source.levelv = 5
smua.source.output = smua.OUTPUT_ON
delay(1)
imeas = i_leakage_measure(smua, 0, 1, 300e-3,
10e-6, .1)
Enable high-capacitance mode. Charge the
capacitor at 5 V for 1 second set
by delay(1).
The parameters passed on to the
i_leakage_measure() function in this
example are:
smu = smua
levelv = 0 V
limiti = 1 A
sourcedelay = 300 ms
measurei = 10 µA range
measuredelay = 100 ms
The levels and delays will depend on the
value and type of capacitor used.
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