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    • A study on the field failures of certain diode bridge rectifiers 

      Korpinen, Katriina (2019)
      A power supply manufacturer had experienced field failures of three-phase diode bridge rectifier modules. The modules seemed to lose their ability to withstand voltage. In this thesis, the rectifier modules used by the ...

    • Acoustic Detection of Cracks and Delamination in Multilayer Ceramic Capacitors 

      Levikari, Saku; Kärkkäinen, Tommi; Andersson, Caroline; Tamminen, Juha; Silventoinen, Pertti (IEEE, 04.10.2018)
      Multilayer Ceramic Capacitors (MLCC) are the most widely used capacitor type in the electronics industry. However, the brittle ceramic dielectric makes MLCCs prone to mechanical damage. Manufacturing defects or damage ...