Task 1: Determine the type of substrate

We received related data from Dr. Ivona last week and finished the first four tasks before the end of last week. This blog mainly explained the first task- identify the type of substrate. Figure 1 [1] illustrates C-V character of p-type material at high frequency. We were planning to find the C-V character from data and to verify if the curve of the material coincide to C-V character of p-type.

Figure 1: C-V character of p-type material

We first plotted C (capacitor) versus V (voltage) by using the data. The plot was performed in the MATLAB software. In order to ensure the plot is correct, data was also applied into Microsoft Excel.

The two screenshots of result are shown below. It is obvious that the material we got is p-tpye.

Figure 2: C vs V (MATLAB)

Figure 3: C vs V (Microsoft Excel)

[1] Keithley (2007) ''C-V Characterization of MOS Capacitors Using the Model 4200-SCS Semiconductor Characterization System'' [online]. Available: www.keithley.co.uk/data?asset=50977. [Accessed: Feb. 3, 2014]