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How to understand the temperature characteristic TCC

The high K medium, which moves the Curie point spike to near room temperature by adjusting the formula, exhibits a very high dielectric constant at 25°C, but at the same time, the K value changes very much whether it is heating or cooling. The low-K medium, on the other hand, has a formulation system that allows the Curie spike to be depressed and broadened, thus exhibiting better stability as desired.

2020

11-13

How to understand insulation resistance IR

There are no electrons in the atomic structure of the insulator that can move freely under the effect of the strength of the external electric field. For ceramic media, the electrons are firmly bound by ionic and covalent bonds, and the resistivity of the material can be almost defined as infinity in theory. But in fact, the resistivity of the insulator is finite, not infinite, because the impurities and defects in the atomic crystal structure of the material will lead to the appearance of charge carriers.

2020

11-13

How to understand dielectric breakdown strength

Dielectric strength characterizes the ability of a dielectric material to withstand a high-intensity electric field without being electrically penetrated, and is usually expressed in volts/mil (V/mil) or volts/centimeter (V/cm).

2020

11-13

How to understand the capacity aging of capacitors

The capacity and dielectric loss of a ferroelectric ceramic capacitor tend to decay over time. This phenomenon, known as aging, is reversible and occurs because the ferroelectric crystal structure changes with temperature.

2020

11-13

How to understand the electrostatic capacity of capacitors

In this "multilayer" structure, the electrode area A is greatly increased due to the parallel arrangement of the multilayer electrodes and the very thin dielectric layer between the opposing electrodes, so that the capacitance C increases as the factor N (number of dielectric layers) increases and as the thickness t′ of the dielectric layer decreases. Here A' refers to the overlapping area of the overlapping electrodes.

2020

11-13

How to understand the dielectric loss of capacitors.

The frequency range used by the dielectric material has a significant effect on its polarization mechanism, mainly on the polarization "relaxation" process or time delay of the material with the reversal of the AC electric field. The relaxation time of the instantaneous polarization process is short, and the relaxation time of the delayed polarization process is long. Among the atoms and ions that make up the ceramic medium, the latter causes greater dielectric loss. When the frequency of the external electric field is synchronized with the time period of the relaxation process, the loss value is the largest. In short, when the relaxation time is very different from the period of the external electric field, the loss is very small:

2020

11-13

How to understand Q and ESR

An important performance index for evaluating high-frequency chip capacitors is the quality factor Q, or the equivalent series resistance (ESR) associated with it. In addition to providing high-performance RF components, the company is also committed to providing customers with accurate and complete performance data. To achieve this goal, in this article we discuss in detail the measurement and understanding of Q and ESR.

2020

11-13

RF Current and Power of Capacitor

This article mainly discusses the relationship between the loading current, power loss, operating voltage and maximum rated voltage of multilayer ceramic capacitors. The maximum current through the capacitor is mainly limited by the maximum rated voltage and the maximum power loss. The capacitance and the operating frequency of the capacitor determine which of the two is the dominant one. For a capacitor with a lower capacitance value at a given frequency or a given capacitor operating at a lower frequency, their highest voltage limit is generally reached faster than the limit of maximum power loss.

2020

11-13

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