Metal-Oxide Capacitor Layer Structure for High-Temperature Stability
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Solution Overview
Problem
There is a demand for capacitors with high resistance to high temperatures.
Innovation Solution
A capacitor design featuring a dielectric layer with a first conductive layer made of metal oxide, followed by a second conductive layer with a larger average thickness, which helps in preventing separation under high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional single-layer conductive structure is used, then the device complexity is low, but the high-temperature resistance is insufficient
Solution Approach 1:
The conductive layer is segmented into multiple sub-layers (first conductive layer, second conductive layer, and third conductive layer) with different thicknesses and functions. This segmentation allows each layer to address specific requirements: the first layer provides base conductivity, the second layer (with greater thickness) enhances high-temperature stability, and the third layer completes the conductive path, collectively improving high-temperature resistance without excessive complexity
Solution Approach 2:
Different regions of the conductive layer structure are assigned different qualities: the second conductive layer is designed with greater average thickness specifically at locations where high-temperature stress relief is critical, while other layers maintain thinner profiles. This local differentiation optimizes thermal performance where needed without uniformly increasing overall device complexity
2Stability of the object's composition
If the conductive layer thickness is increased to prevent separation, then the layer integrity improves, but the stress relief capability deteriorates
Solution Approach 1:
The conductive layer is divided into multiple sub-layers with varying thicknesses. The second conductive layer has a greater average thickness than the first and third layers, creating a gradient structure that provides both stress relief (through the thicker intermediate layer) and layer integrity (through the combined multi-layer structure). This segmentation allows simultaneous optimization of both conflicting requirements
Solution Approach 2:
The thickness parameter of the conductive layer is varied across different sub-layers rather than maintaining a uniform thickness. By changing the thickness parameter locally (greater thickness in the second layer, thinner in first and third layers), the structure achieves both stress relief capability and layer integrity, resolving the contradiction between these two properties
Data Source
AI summary
A capacitor disclosed includes an anode body having a dielectric layer formed on a surface of the anode body, and a conductive layer formed on the dielectric layer and made of a metal oxide. The conductive layer includes a first conductive layer formed on the dielectric layer, and a second conductive layer formed on the first conductive layer. The average thickness of the second conductive layer is larger than the average thickness of the first conductive layer.