Umberto Celano received a M.Sc. degree in Nanoelectronics from the University of Rome ``Sapienza'', Italy and a Ph.D. degree in Physics from the KU Leuven, Belgium in 2011 and 2015 respectively. Currently, he is a researcher in the material and component analysis group of imec in Belgium. Umberto's research interests include nanometer scale issues in materials, emerging nanoelectronics and physical characterization. His goal is to explore methods and novel metrology techniques that enable the understanding of the physics in nanomaterials and nanoelectronics devices.

• Introduction.- Filamentary-Based Resistive Switching.- Nanoscaled Electrical Characterization.- Conductive Filaments: Formation, Observation and Manipulation.- Three-Dimensional Filament Observation.- Reliability Threats in CBRAM.- Conclusions and Outlook.

Umberto Celano received a M.Sc. degree in Nanoelectronics from the University of Rome ``Sapienza'', Italy and a Ph.D. degree in Physics from the KU Leuven, Belgium in 2011 and 2015 respectively. Currently, he is a researcher in the material and component analysis group of imec in Belgium. Umberto's research interests include nanometer scale issues in materials, emerging nanoelectronics and physical characterization. His goal is to explore methods and novel metrology techniques that enable the understanding of the physics in nanomaterials and nanoelectronics devices.

• Introduction.- Filamentary-Based Resistive Switching.- Nanoscaled Electrical Characterization.- Conductive Filaments: Formation, Observation and Manipulation.- Three-Dimensional Filament Observation.- Reliability Threats in CBRAM.- Conclusions and Outlook.

Umberto Celano received a M.Sc. degree in Nanoelectronics from the University of Rome ``Sapienza'', Italy and a Ph.D. degree in Physics from the KU Leuven, Belgium in 2011 and 2015 respectively. Currently, he is a researcher in the material and component analysis group of imec in Belgium. Umberto's research interests include nanometer scale issues in materials, emerging nanoelectronics and physical characterization. His goal is to explore methods and novel metrology techniques that enable the understanding of the physics in nanomaterials and nanoelectronics devices.

• Introduction.- Filamentary-Based Resistive Switching.- Nanoscaled Electrical Characterization.- Conductive Filaments: Formation, Observation and Manipulation.- Three-Dimensional Filament Observation.- Reliability Threats in CBRAM.- Conclusions and Outlook.