Multilayer Capacitor Dielectric Grain Structure for High Capacitance
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Solution Overview
Problem
Existing multilayer ceramic capacitors face limitations in miniaturization and high capacitance due to the thickness of dielectric layers, and there is a need to improve dielectric characteristics through mechanisms other than reducing layer thickness.
Innovation Solution
A multilayer electronic component with a dielectric layer comprising a mixture of dielectric grains with nano domains (10 nm to 100 nm) and polar nano regions (less than 10 nm) is designed, where the ratio of these grains is controlled to enhance dielectric characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the thickness of the dielectric layer is decreased to achieve miniaturization and high capacitance, then the capacitance density increases, but the dielectric characteristics deteriorate and manufacturing becomes difficult
Solution Approach 1:
The patent applies local quality by creating dielectric grains with non-uniform domain structures. Specifically, it introduces two types of dielectric grains: one with nano domains (10-100 nm) and another with polar nano regions (<10 nm). This local differentiation in domain structure within the dielectric layer enables improved dielectric characteristics without requiring further thickness reduction, thus resolving the contradiction between capacitance density and dielectric reliability.
Solution Approach 2:
The patent employs composite materials by combining different types of dielectric grains with distinct domain structures within the same dielectric layer. The mixture of grains containing nano domains and polar nano regions creates a composite dielectric structure that achieves both high capacitance density and maintained dielectric characteristics, eliminating the need to reduce layer thickness further.
2Volume of moving object
If the thickness of the dielectric layer is reduced to enable further miniaturization, then the component size decreases, but the dielectric characteristics and dissipation factor worsen
Solution Approach 1:
The patent applies parameter changes by modifying the domain structure parameters within the dielectric grains. By controlling the size and distribution of nano domains (10-100 nm) and polar nano regions (<10 nm), the patent achieves improved dielectric characteristics and reduced dissipation factor without changing the overall dielectric layer thickness, thereby enabling miniaturization while maintaining reliability.
3Reliability
If the dielectric layer thickness is maintained at current levels, then dielectric characteristics are preserved, but further miniaturization and high capacitance cannot be achieved
Solution Approach 1:
The patent applies segmentation by dividing the dielectric layer into multiple types of dielectric grains with different domain structures. Instead of using a uniform dielectric structure, it segments the dielectric material into grains containing nano domains and separate grains containing polar nano regions. This segmentation enables enhanced capacitance density while maintaining dielectric characteristics without requiring thickness reduction.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The component achieves improved dielectric characteristics and reduced dissipation factor, facilitating miniaturization and high capacitance without further reducing layer thickness.
Implementation Method 1
it has been revealed that controlling polarization characteristics by external electric or magnetic field as a factor that can affect the dielectric characteristics
Data Source
AI summary
A multilayer electronic component may include a body including a capacitance forming portion including a dielectric layer including a plurality of dielectric grains, and a plurality of internal electrodes alternately disposed to be stacked with the dielectric layer; and an external electrode disposed on the body, wherein the plurality of dielectric grains include a first dielectric grain including a nano domain that is a domain region with a major diameter of 10 nm to 100 nm, and a second dielectric grain including a polar nano region including a domain region with a major diameter of less than 10 nm, and when the number of the first dielectric grains included in the capacitance forming portion is ND, and the number of the second dielectric grains included in the capacitance forming portion is RD, 50%<ND/(ND+RD) may be satisfied.