Colossal dielectric constant in K2Ti2O5

Colossal Dielectric and Electromechanical Responses in Self Assembled Polymeric Nanocomposites

Determination of Dielectric Constant

Introduction The dielectric constant of PCB material is important in determining the trace width required to produce a characteristic impedance of 50 ohms, or any other desired impedance. The most commonly used material, FR-4, has a dielectric constant that may vary widely between manufacturers or batches, and also varies over frequency. It is useful to have a method to determine the dielectric...

High dielectric constant oxides

The scaling of complementary metal oxide semiconductor (CMOS) transistors has led to the silicon dioxide layer used as a gate dielectric becoming so thin (1.4 nm) that its leakage current is too large. It is necessary to replace the SiO2 with a physically thicker layer of oxides of higher dielectric constant (κ) or ‘high K’ gate oxides such as hafnium oxide and hafnium silicate. Little was know...

Microcontroller Based Dielectric Constant Measurement

A dielectric constant measurement setup has been developed to measure dielectric constant of liquids using AT89C55WD microcontroller. A modified operational amplifier based AC Schering Bridge network is used to compute capacitance and hence calculate dielectric constant of liquids. This instrument system permits recording of dielectric constant of liquids at various concentrations and temperatu...

Dielectric-constant evaluation from microstructures

We present an accurate, efficient algorithm for calculating the effective dielectric constant «̄ of periodic two-component composites with arbitrary unit-cell microstructures. The algorithm is based on a formulation of the relevant equations in the Bergman-Milton representation of «̄ that enables the use of the fast Fourier transform in their solution, coupled with the sum rules of the geometric ...