Advantages and Disadvantages of SOI in terms of radiation tolerance

Institute of space and astronautical science (ISAS) succeeded in orbit injection of a space satellite in 1970, which was the fourth in the world. After then we launched more than 30 space satellites including space probes. One of the space probes, named HAYABUSA, lunched in 2003 and returned to the earth with small amount of sands on a small asteroid named ITOKAWA in 2010 [1], which is an outstanding achievement succeeding to Apollo's great achievement in USA that gathered the mineral of the moon. Since then, exploration of planets and asteroids is one of important missions in ISAS. Presently, HAYABUSA-2 is on an orbit and is exploring another type of asteroids named RYUGU. To achieve more innovative missions in a deep space, advanced LSIs with both high radiation tolerance against harsh environment [2] and low power consumption are strongly required. For this purpose, we are in charge of research and development of LSIs as well as electronic devices used for space science mission. For example, we have been studying radiation effects on advanced devices promising for space science including the SOI devices, spintronics devices [3], [4], and perovskite solar cells [5].