Capacitor Electrode Silicon Gradient Antiresonance
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Solution Overview
Problem
Capacitors with different self-resonant frequencies connected in parallel can degrade impedance characteristics and decoupling functions at antiresonant frequencies, leading to performance issues.
Innovation Solution
A capacitor design with specific electrode layer compositions and structures, including varying silicon (Si) content and conductive materials, is used to maintain impedance characteristics even when connected to capacitors with different self-resonant frequencies, featuring thicker electrode layers and plating layers to enhance moisture resistance and adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If capacitors with different self-resonant frequencies are connected in parallel, then the capacitor can provide broader frequency coverage, but impedance characteristics and decoupling functions are degraded at antiresonant frequencies
Solution Approach 1:
The patent applies local quality by creating asymmetric electrode layer structures where the first electrode layer has a different silicon content than the second electrode layer. Specifically, the first electrode layer contains a higher ratio of silicon to conductive material than the second electrode layer, creating localized compositional differences that tune the self-resonant frequency characteristics of individual capacitors to reduce antiresonance effects when connected in parallel.
2Reliability
If electrode layers are made thicker to improve moisture resistance and adhesion, then reliability is improved, but manufacturing complexity and material consumption increase
Solution Approach 1:
The patent implements local quality by varying the thickness and composition of different electrode layers. The first electrode layer is made thicker with higher silicon content for enhanced moisture resistance, while the second electrode layer maintains lower thickness and silicon content for cost-effectiveness. This localized differentiation optimizes protective properties where needed without uniformly increasing complexity throughout the entire electrode structure.
Data Source
AI summary
A capacitor includes a capacitor main body with first and second primary surfaces and first through fourth side surfaces, internal electrodes, and first through fourth terminal electrodes, wherein the third terminal electrode includes a first electrode layer provided on the third side surface and a second electrode layer provided on the first electrode layer, the fourth terminal electrode includes a third electrode layer provided on the fourth side surface and a fourth electrode layer provided on the third electrode layer, the first electrode layer includes a conductive material and Si, the second electrode layer includes a conductive material and Si, and a ratio by weight of Si in the first electrode layer is greater than a ratio by weight of Si in the second electrode layer.