What is an SOI?

SOI stands for Silicon-On-Insulator.

Typically, pn junction isolation is used to electrically isolate devices on an integrated circuit (IC). In contrast, SOI uses a silicon dioxide (SiO2) layer for isolation between devices. SOI technology makes it possible to prevent malfunction and destruction of an IC caused by vertical and horizontal parasitic devices formed by conventional pn junction isolation.

Fig. 1 Cross-section view of a structure
Fig. 1 Cross-section view of a structure
Fig. 2 Cross-section view of p-n junction isolation
Fig. 2 Cross-section view of p-n junction isolation

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