Series-Partitioned Porous Capacitor Structure Against Short Circuits
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Solution Overview
Problem
Capacitors with a single capacitance forming part are prone to short circuits due to electric field concentration, impairing their functionality.
Innovation Solution
The capacitor design includes a configuration with a first and second capacitance forming part, each comprising a metal porous body, dielectric film, and conductive film, partitioned by metal wall and partition wall portions, and connected in series through external connection lines, enhancing electrical reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single capacitance forming part is used, then the device complexity is reduced, but the reliability deteriorates due to electric field concentration causing short circuits
Solution Approach 1:
The capacitance forming part is divided into multiple independent capacitance elements (first capacitance element, second capacitance element, etc.) that are connected in series. Each element has its own metal porous body, dielectric film, and conductive film, creating separate capacitance forming regions that prevent electric field concentration from causing immediate short circuit failure across the entire device.
2Reliability
If multiple capacitance forming parts are used in series, then the reliability is improved, but the device complexity increases
Solution Approach 1:
Multiple capacitance elements are combined within a single capacitor device, sharing common external connection lines and insulating substrate infrastructure. The first and second capacitance elements are integrated into one device with shared terminal structures, reducing the overall complexity compared to using completely separate capacitor components.
3Reliability
If multiple capacitance forming parts are used, then the reliability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The dielectric film and conductive film are formed continuously across multiple capacitance elements using atomic layer deposition (ALD) method. The films are deposited in a continuous process that covers all metal porous bodies sequentially, ensuring uniform thickness and properties across all capacitance elements without requiring separate manufacturing steps for each element, thereby maintaining consistent precision throughout the device.
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
This design improves the reliability of capacitors by preventing short circuits and maintaining functionality under electric field stress.
Implementation Method 1
a first dielectric film covering a surface of the first metal porous body
Implementation Method 2
a first conductive film covering the first dielectric film
Implementation Method 3
at least the first capacitance forming part and the second capacitance forming part are electrically connected in series between the first external connection line and the second external connection line
Data Source
AI summary
A capacitor that includes: an insulating substrate; a capacitance forming part; a first external connection line; a second external connection line; and a first metal wall portion. The first metal wall portion partitions the capacitance forming part into a first capacitance forming part and a second capacitance forming part. The first capacitance forming part includes a conductive first metal porous body, a first dielectric film, and a first conductive film, and the second capacitance forming part includes a conductive second metal porous body, a second dielectric film, and a second conductive film. The first metal wall portion is joined to the first conductive film and the second conductive film so that at least the first capacitance forming part and the second capacitance forming part are electrically connected in series between the first external connection line and the second external connection line.