Resistivity

Studies showed that sheet resistance sputtered ITO films is proportional to the inverse of temperature and pressure \cite{yasrebi2014optimization}. It follows that sheet conductance, and thus material conductivity vary linearly with the temperature and pressure. We thus decided to use the conductivity, rather than resistivity as the experiment response. This justifies the use of a linear regression model.
The model (Fig. \ref{153384}) shows that increasing Argon flow and temperature, as well as decreasing the base pressure will increase the conductivity. However it is important to remember that the temperature effect is aliased with potentially important interactions. Additional experiments can be performed to de-alias the main effects from first order interactions.