The conductivity may be varied by adjusting the thickness with different rotational speeds. Thicker layers of 90 nm thus have a 2.5 times higher conductivity as compared to 60 nm thick layers. For the build-up of an even conductive layer, the substrate should be wetted with the resist solution before the spin process is started. After a certain storage time at room temperature, the coating pattern of Electra may change slightly. To restore the coating pattern, treatment with ultrasound and filtration (0.2 μm) can then be carried out.