MIM stands for Metal - Insulator - Metal. A MIM diode is a multilayer diode consisting of two metal layers with an insulating layer between them. It operates as a bidirectional Zener di ode and can be designed in thin-film technology
. MIM diodes operate bidirectionally and switch when a predetermined threshold is exceeded, both at positive and negative voltage
. The threshold values at which the MIM diodes switch to the conducting state depend on the structure, but also on the thickness of the insulation layer and the physical properties of the insulation and metal layers.