Abstract
SOIPiX is a R&D project targeting the development of monolithic pixel detectors with Silicon On Insulator technology for future high energy physics experiments, X-ray experiments, and other applications. It integrates both radiation sensors and LSI circuits in one chip to achieve high resolution and intelligent detectors. After a short introduction about the advantages of monolithic active pixel sensors, the main characteristics of SOI monolithic sensors will be discussed: technological process, response to incident radiation and radiation hardness. Special attention will be given to the description of the so-called "back-gate" effect and the different techniques developed to mitigate it. Finally, various applications of this technology will be presented.