Tuomo Siponkoski

Bachelor Thesis:
Characterization of the dielectric properties of wood-based substrate
materials, University of Oulu.

In this thesis, the dielectric properties of different wood-based materials were characterized. Based on the results, it was estimated how well these materials would suit for use as substrates in electronics, and whether they could thus provide a more environmentally friendly alternative to the commonly used FR4 fiberglass.

Bachelor Thesis:
Measurement software for characterizing piezoelectric materials using biased impedance spectroscopy, University of Oulu.

In this thesis basics of piezoelectricity and piezoelectric ceramics were introduced. The main focus was on a designing and implementing a measuring software in LabVIEW environment, which can be used to automatically measure resonance frequencies and calculate coupling factors from a bulk piezoceramics.

Bachelor Thesis:
Processing and characterizing of BaTiO3, University of Oulu.

In this study different processing steps of ceramic fabrication and the basic theory on piezoelectric ceramics and barium titanate were presented along with the possible methods to replace the conventional sintering. Barium titanate samples were fabricated using the conventional sintering method and their electromechanical properties measured.