Acquisition Mode - Ossila FACT1 User Manual

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Automatic Mode: the User can choose to characterise up to 20 devices and independently control
up to eight gate lines. See Quick Start for more details on how to set up an automatic acquisition.
In automatic mode, the Ossila multiplexor "SwitchControl20" must be connected to the host PC via
a USB cable, otherwise error code 5040 will be generated an no acquisition can start.
Manual Mode: the multiplexor unit is disregarded. Consequently SuperFACT can operate with any
manual test fixture by simply connecting the test fixture BNC gate and source/drain inputs to any
supported SMU.
Note: If at application start (or during hardware reset), the SwitchControl20 is not detected or it is
not working properly, the application will switch to Manual Mode automatically.
Important: Do not use the multiplexer in manual mode. When in manual mode, the multiplexer unit
remains inactive throughout the acquisition cycle. However, providing the host computer is
connected to the multiplexer, it is possible to take measurement using a manual text fixture in
manual mode. In this case, you need to connect the SMU to the manual test fixture, manually select
the device to measure, and programme SuperFACT to measure only one device at the time. See
Quick Start section for details on how programme an OFET/TFT acquisition.

Acquisition Mode

SuperFACT supports two main acquisition modes: Finite Measurement and Continuous
Measurement.
Finite Measurement: One single measurement per substrate/device (Standard FET characterisation)
or, alternatively, a finite number of repeated Standard Characterisations carried out at regular time
intervals, and with the option of keeping the substrate at a constant bias voltage between two
consecutive acquisitions (Biased Finite Measurement).
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