Multilayer Ceramic Capacitor Layout for Lower ESR and ESL
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Solution Overview
Problem
Existing electronic components for temperature compensation face challenges in reducing equivalent series resistance (ESR) and equivalent series inductance (ESL), which are crucial for achieving good high-frequency characteristics and minimizing power consumption.
Innovation Solution
The electronic component incorporates a multilayer body with dielectric layers containing at least one of Ca, Zr, or Ti, and internal electrode layers made of Cu. The component is designed with a specific dimension relationship (L0 < W0 < T0) to optimize the number of laminated sheets, reducing the size and enhancing capacitance, while also minimizing ESR and ESL.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of laminated sheets is increased to reduce ESR and ESL, then the component size increases, but compactness is worsened
Solution Approach 1:
The patent changes the material parameters of the dielectric layer by incorporating specific metal elements (Ca, Zr, Ti) in controlled amounts. This modifies the electrical properties of the dielectric, enabling reduced ESR and ESL without increasing the number of laminated sheets, thus maintaining compact component size while improving electrical performance
Solution Approach 2:
The patent uses composite dielectric materials containing multiple metal elements (Ca, Zr, Ti) combined with ceramic base materials. This composite approach optimizes both electrical characteristics (lower ESR/ESL) and physical dimensions, achieving high performance in a compact form factor without increasing component size
2Reliability
If the number of laminated sheets is increased to reduce ESR and ESL, then the component size increases, but manufacturing complexity is worsened
Solution Approach 1:
The patent modifies the chemical composition parameters of the dielectric layer by adding specific metal elements (Ca: 0.1-5 wt%, Zr: 0.1-5 wt%, Ti: 0.1-5 wt%). This parameter change approach reduces ESL and ESR through material property optimization rather than increasing structural complexity through more laminated sheets
Solution Approach 2:
The patent maintains a standard multilayer capacitor structure with modified dielectric composition, copying the proven effective lamination pattern while substituting material composition to achieve the desired electrical performance without complicating the manufacturing process
Data Source
AI summary
A multilayer ceramic capacitor includes a multilayer body including dielectric layers and internal electrode layers laminated alternately on each other, and external electrode layers provided on opposing end surfaces of the multilayer body in a length direction orthogonal or substantially orthogonal to a lamination direction, and each connected with the internal electrode layers, in which the dielectric layers each include at least one of Ca, Zr, or Ti, the internal electrode layers each include Cu, and when a dimension in the lamination direction of the multilayer body is defined as T0, a dimension in the length direction of the multilayer body is defined as L0, and a dimension in a width direction orthogonal or substantially orthogonal to the lamination direction and the length direction is defined as W0, a relationship of L0<W0<T0 is satisfied.