Ossila FACT1 User Manual page 58

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In finite measurement mode, the output and transfer data are saved in two separate files, one per
device. In addition, the main figures of merit and the transfer curves are also collectively saved in an
'overview' file so as to facilitate statistical analysis and data representation.
The complete data logging structure for finite measurement mode is the following:
IV file. It contains the output characteristics and the gate leakage current.
TC file. Depending on the measurement settings chosen, it contains the linear and transfer
characteristics, the entire set of transistor figures of merit as function of the gate voltage (if
applicable), the linear fit with upper and lower bounds or, alternatively, the first and second
derivative of the transfer curves.
JPEG file. It stores the IV, TC, mobility etc plots as screenshot on the output UI.
Overview file contains the OFET/TFT figures of merit and both linear and transfer curves for
all the DUTs measured during the session.
If both Create Folder and Time Stamp options are enabled, the data logging tree is
Volume:\Folder\ d_m_Y-h_m_s_File Name_IV_Devn
... \ d_m_Y-h_m_s_File Name_TC_Devn
...\ d_m_Y-h_m_s_File Name_Devn
...\ d_m_Y-h_m_s_File Name_IV_Overview
Where Folder and File Name are the path and the string specified in the Folder and File Name inputs
of the Select Devices to Measure and Measurement Type UI, respectively.
d_m_Y-h_m_s is the time stamp with day (d) of the month (m), and year Y. The current time is
specified by h (hour), m (minute) and s (second). Finally, n in Devn is the DUT number.
Important: When operating in finite measurement mode, SuperFACT requires exclusive use of MS
Excel©. Consequently, you must close any open Excel files before starting a measurement and avoid
using this application while a measurement is underway, otherwise SuperFACT may fail to store the
data and return an error. If an instance of MS Excel is open when a measurement session is started,
SuperFACT will prompt the user to close any open Excel files and then restart the acquisition
In lifetime mode, for each acquisition cycle and for each DUT, a IV and TC files with time stamp are
generated. These files are the same as files 1) and 2) for the finite acquisition mode case. The times
series of the OFET/TFT figures of merit for saturation and linear regime are saved in two separate
files, one per each DUT. The experiment settings are also recorded on a 'header' file.
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It is possible that an Excel instance remains open in the 'background' (i.e. not visible to the user), even after
any open Excel files have been closed. Every time that a finite mode measurement is initiated, SuperFACT
opens an Excel instance in background mode. This instance may remain open if SuperFACT fails to close it
because, for example, an execution error has occurred. If Excel is still open in the background, SuperFACT will
try to close this instance and ask the user to restart the acquisition.
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