Publication

Design Considerations of Ferroelectric Properties for Negative Capacitance MOSFETs

Mihai Adrian Ionescu, Christian Enz, Farzan Jazaeri, Ali Saeidi
2018
Conference Papers

Abstract

Impact of physical parameters of ferroelectric layer on the performance of Negative Capacitance (NC) MOSFETs is experimentally studied in this paper. Electrical behaviors of PZT-based and Si:HfO2-based NC-FETs are investigated and discussed. In a PZT-based p-type NC-FET, a sub-thermal swing down to 20mV/dec is achieved due to the remarkable voltage gain of NC, reaching a maximum value of 10V/V. Nevertheless, the performance improvements with Si:HfO2 NC booster are significantly lower than PZT due to the coexistence of different phases and also high leakage current which can enormously reduce the enhancement by NC.

Official source

https://infoscience.epfl.ch/entities/publication/7a71ce7d-3d5e-4a74-a182-0aefdbbc8301

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Mihai Adrian Ionescu, Christian Enz, Farzan Jazaeri, Ali Saeidi
2018
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/7a71ce7d-3d5e-4a74-a182-0aefdbbc8301

About this result

Related concepts (18)

Ferroelectricity

Ferroelectricity is a characteristic of certain materials that have a spontaneous electric polarization that can be reversed by the application of an external electric field. All ferroelectrics are also piezoelectric and pyroelectric, with the additional property that their natural electrical polarization is reversible. The term is used in analogy to ferromagnetism, in which a material exhibits a permanent magnetic moment. Ferromagnetism was already known when ferroelectricity was discovered in 1920 in Rochelle salt by Joseph Valasek.

Lead zirconate titanate

Lead zirconate titanate, also called lead zirconium titanate and commonly abbreviated as PZT, is an inorganic compound with the chemical formula It is a ceramic perovskite material that shows a marked piezoelectric effect, meaning that the compound changes shape when an electric field is applied. It is used in a number of practical applications such as ultrasonic transducers and piezoelectric resonators. It is a white to off-white solid. Lead zirconium titanate was first developed around 1952 at the Tokyo Institute of Technology.

Ceramic capacitor

A ceramic capacitor is a fixed-value capacitor where the ceramic material acts as the dielectric. It is constructed of two or more alternating layers of ceramic and a metal layer acting as the electrodes. The composition of the ceramic material defines the electrical behavior and therefore applications. Ceramic capacitors are divided into two application classes: Class 1 ceramic capacitors offer high stability and low losses for resonant circuit applications.

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