Electrical behavior of the Diamond layout style for MOSFETs in X-rays ionizing radiation environments

This paper aims to describe some innovative layout styles, which are capable to boost the electrical performance and, in the same time, the Total Ionizing Dose (TID) tolerance of Metal-Oxide-Semiconductor (MOS) Field Effect Transistors (MOSFET), without burdening the current planar Complementary MOS (CMOS) Integrated Circuits (ICs) manufacturing processes. To illustrate the potential use of these new alternative devices in analog and digital CMOS ICs applications, this work focuses on the Diamond layout style for MOSFET that presents hexagonal gate geometry. The new effects associated to this innovative transistor structure and its modeling are presented and discussed in detail. Some experimental results are illustrated to evidence its use mainly in space and medical CMOS ICs applications.

Graphical abstractThe Diamond layout style is capable to improve radiation tolerance of the threshold voltage, on-state drain current and off-state drain current of MOSFETs in relation to the conventional ones counterparts.Figure optionsDownload full-size imageDownload as PowerPoint slide