To enable high-capacitance mode from the front panel:
1. Press the CONFIG key.
2. Press the SRC key and then select HIGHC-MODE.
3. Select SRC-ENABLE and then press the navigation wheel (or the ENTER key).
4. Select ENABLE and then press the navigation wheel (or the ENTER key).
5. Press the EXIT (LOCAL) key to back out of the menu structure.
To enable high-capacitance mode using a remote interface:
Turning on high-capacitance mode has the following effects on the SMU* settings:
• smuX.measure.autorangei is set to smuX.AUTORANGE_FOLLOW_LIMIT and cannot be
changed.
• Current ranges below 1 µA are not accessible.
• If smuX.source.limiti is less than 1 µA, it is raised to 1 µA.
• If smuX.source.rangei is less than 1 µA, it is raised to 1 µA.
• If smuX.source.lowrangei is less than 1 µA, it is raised to 1 µA.
• If smuX.measure.lowrangei is less than 1 µA, it is raised to 1 µA.
* smuX can be smua for channel A or smub for channel B
Measuring current using high-capacitance mode
The following inputs are required to test leakage using the factory leakage script, as shown in the
following script example.
â–ª SMU: Sets the 2600B source-measure unit to use
â–ª levelv: Sets the output voltage level
â–ª limiti: Sets the current limit for discharging or charging the capacitor
â–ª sourcedelay: Solves the following equation to determine the amount of time before making a
current reading:
Where: i is the limiti setting (current limit)
â–ª measurei: Sets the current measure range
â–ª measuredelay: Defines the delay to wait after lowering the current limit before making the
measurement
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