Laminated Ceramic Component Fuse Electrode for Short-Circuit Isolation
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Solution Overview
Problem
Laminated ceramic electronic components are prone to short circuits and overheating due to thermal and mechanical stresses, leading to potential fuming, firing, and loss of function when mounted on a wiring substrate.
Innovation Solution
Incorporating an intermediate electrode made of conductive carbon material that functions as a fuse, electrically connecting electrode layers and external electrodes, which burns and cuts off the current when a short circuit occurs, preventing overheating and maintaining the component's functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrode materials are used in laminated ceramic electronic components, then electrical connectivity is maintained, but the component is prone to short circuits and overheating under thermal and mechanical stresses
Solution Approach 1:
The patent changes the material parameter of the intermediate electrode from conventional metals to conductive carbon material, which has different thermal and electrical properties. This material substitution allows the intermediate electrode to resist short circuits and prevent overheating while maintaining electrical connectivity, directly resolving the reliability-temperature contradiction.
Solution Approach 2:
The patent introduces an intermediate electrode as a mediator between the external electrode and the electrode layer. This intermediate carbon-based electrode acts as a protective buffer that prevents direct thermal and mechanical stress transmission, reducing short circuit risks and overheating while maintaining electrical connection.
2Reliability
If intermediate electrode is added to prevent short circuits, then reliability improves, but device complexity increases
Solution Approach 1:
The patent merges the intermediate electrode with the existing electrode structure during the lamination process. The conductive carbon material is applied as part of the green sheet assembly before firing, integrating the protective function into the existing manufacturing flow without adding separate complex assembly steps.
Solution Approach 2:
The intermediate electrode is designed as a sacrificial or protective layer that can be consumed or degraded under extreme conditions to protect the main electrode structure. This disposable approach provides reliable short circuit protection without requiring complex reusable mechanisms.
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
The conductive carbon intermediate electrode effectively blocks overcurrent, reducing the risk of fuming and firing, and maintains the component's functionality by isolating the short-circuited area, thus enhancing reliability and reducing damage from thermal stress.
Implementation Method 1
an intermediate electrode configured to electrically connect at least one electrode layer and one of the external electrodes, wherein the intermediate electrode contains a conductive carbon material
Implementation Method 2
functions as a fuse, electrically connecting electrode layers and external electrodes, which burns and cuts off the current when a short circuit occurs
Data Source
AI summary
A laminated ceramic electronic component according to the present disclosure includes a laminated body, a pair of external electrodes, and an intermediate electrode. The laminated body includes ceramic layers and electrode layers which are alternately laminated and a pair of end portions in a longitudinal direction of the laminated body. The pair of external electrodes are provided at the pair of end portions of the laminated body. The intermediate electrode includes a first end being in direct contact with at least one of the electrode layers and a second end being in contact with one of the external electrodes, such that the intermediate electrode physically separates each of the electrode layers and the external electrodes. Additionally, each electrode layer has a first current value for electrical breakdown, and the intermediate electrode has a second current value for electrical breakdown, which is lower than the first current value.