Utilities_Ulib - Keithley 4200A-SCS Reference Manual

Section 6: Clarius

utilities_ulib

The utilities_ulib user library provides a user module to add delays.
utilities_ulib user module
User module
Delay_second
VLowFreqCV user library
The VLowFreqCV user library contains user modules that are used for very low frequency C-V
characterization. The next table briefly describes the user modules.
VLowFreqCV user modules
•
vlfcv_measure
Makes a single C-V measurement using two SMUs connected to the device under test (DUT).
•
vlfcv_measure_dual_sweep_bias
Performs C-V characterization at multiple DC bias values. This module allows dual sweep,
sweeping from a start to stop bias, with one measure point at the stop point before sweeping
back to the start point.
•
vlfcv_measure_dual_sweep_bias_fixed_range
Performs C-V characterization at multiple DC bias values. This module allows dual sweep,
sweeping from the start point to the stop point, with one measure point at the stop point before
sweeping back to the start point. It uses a fixed measure range for the SMU for the entire voltage
bias sweep. The routine uses the maximum DC bias voltage, expected_C and expected_R to
determine the maximum current for the test and uses this current to set the current measure
range for the test.
•
vlfcv_measure_sweep_bias
Performs C-V characterization at multiple DC bias values. It makes the same measurements as
vlfcv_measure, but allows you to make measurements at each point of a linear sweep of the
DC bias voltage.
•
vlfcv_measure_sweep_bias_fixed_range
Performs C-V characterization at multiple DC bias values. This routine performs the same
measurements as vlfcv_measure, but allows you to make measurements at each point of a
linear sweep of the DC bias voltage. This routine is also similar to
vlfcv_measure_sweep_bias, except that it uses a fixed current measure range on for the
SMU sense for the entire voltage bias sweep. The routine uses the maximum DC bias voltage,
expected_C and expected_R to determine the maximum current for the test and uses this
current to set the current measure range for the test.
•
vlfcv_measure_sweep_freq
Performs C-V characterization at multiple frequency values. It makes the same measurements as
vlfcv_measure, but allows you to make measurements at each point of a list sweep of the test
frequency.
•
vlfcv_measure_sweep_time
Performs C-V characterization a specified number of times, creating a C versus time graph.
6-320
Description
Enter delay time in seconds.
Model 4200A-SCS Parameter Analyzer Reference Manual
4200A-901-01 Rev. C / February 2017