Composite Capacitor Structure for Low Height and Delamination Resistance
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Solution Overview
Problem
Existing composite capacitors with columnar conductors face challenges in reducing overall height and preventing delamination when mounted on bending substrates due to the formation of extending electrode layers.
Innovation Solution
A composite capacitor design featuring a first and second capacitor connected in series, with columnar conductors, dielectric layers, and counter electrode layers, along with a connecting conductor layer and reinforcement conductor to reduce height and prevent delamination by improving mechanical robustness and stress distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If an extending electrode layer is formed on upper electrode layers to connect plural capacitors, then the overall height of the composite capacitor is reduced, but delamination occurs between the extending electrode layer and the upper electrode layers when the mounting substrate bends
Solution Approach 1:
The patent replaces the extending electrode layer with a flexible columnar conductor structure that can elastically deform. The columnar conductors have flexible roots that allow bending without breaking, eliminating the delamination problem while maintaining reduced height. This applies the principle of using flexible structures instead of rigid connecting layers.
Solution Approach 2:
The patent introduces dynamic flexibility to the electrode structure through columnar conductors with elastic roots. These roots allow the conductors to bend and deform elastically when the substrate bends, transforming the static rigid connection into a dynamic flexible one that adapts to substrate deformation without delamination.
2Volume of moving object
If columnar conductors are used in composite capacitors, then the capacitor structure is compact, but the capacitors cannot deform elastically in the extending direction of the columnar conductors
Solution Approach 1:
The patent segments the columnar conductor into two functional parts: a rigid upper portion that maintains electrical connection and a flexible root portion that enables elastic deformation. This segmentation allows the conductor to maintain compact structure while gaining deformation capability, resolving the contradiction between compactness and adaptability.
Solution Approach 2:
The patent applies different mechanical properties to different parts of the columnar conductor. The root portion has high flexibility to enable deformation, while the upper portion maintains structural integrity for electrical connection. This local differentiation of material properties allows the single structure to satisfy both compactness and elastic deformation requirements.
Data Source
AI summary
A composite capacitor that includes a first capacitor and a second capacitor. Each of plural first columnar conductors and each of plural second columnar conductors have a nano-size outer diameter. The composite capacitor includes a connecting conductor layer and a reinforcement conductor. The reinforcement conductor is located between a first counter electrode layer and a second counter electrode layer of the first capacitor and the second capacitor, respectively, and is connected to each of the first counter electrode layer, the second counter electrode layer, and the connecting conductor layer. The material forming the reinforcement conductor is the same as each of the first counter electrode layer and the second counter electrode layer and is different from the material forming the connecting conductor layer.