Multilayer Ceramic Capacitor Insulating Coating ESL Reduction
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Solution Overview
Problem
Multilayer ceramic capacitors face challenges in reducing equivalent series inductance (ESL) while maintaining reliability due to processing variations that can expose extended electrode portions, leading to increased size of the current loop and weakened high-frequency noise removal, and reliability issues from electrode exposure.
Innovation Solution
The electronic component incorporates a multilayer body with insulating coating portions that cover and secure the extended electrode portions, preventing exposure and reducing ESL by optimizing the length and positioning of these electrodes within the coating regions, thereby enhancing reliability and noise suppression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lengths of the end portions of the extended electrode portions are set smaller than the length of the outer electrodes to prevent exposure, then reliability is improved, but the distance between inner electrode layers increases causing ESL to increase
Solution Approach 1:
The patent introduces insulating coating portions that extend in the width direction to cover extended electrode portions that protrude beyond the outer electrodes in the length direction. This dimensional approach allows the extended electrode portions to be longer (reducing ESL) while still being covered and protected by the insulating coating, thus maintaining reliability.
2Ease of operation
If the lengths of the end portions of the extended electrode portions are set close to the length of the outer electrodes to reduce distance, then ESL is reduced, but processing variations cause exposure leading to reliability degradation
Solution Approach 1:
The insulating coating portions are formed in advance to extend beyond the outer electrodes in the width direction, creating a pre-established protective region. This preliminary action ensures that even if processing variations cause the extended electrode portions to protrude, they are already covered by the insulating coating, preventing exposure and maintaining reliability.
Solution Approach 2:
The patent changes the geometric parameters by extending the insulating coating portions in the width direction beyond the outer electrodes. This parameter change creates an overlapping region that provides a safety margin against processing variations, allowing the extended electrode portions to be optimally positioned without risking exposure.
3Reliability
If insulating coating portions are added to cover extended electrode portions, then reliability is maintained, but device complexity increases
Solution Approach 1:
The insulating coating portions are merged with the existing electrode structure, forming an integrated solution where the coating portions and electrodes work together as a unified system. This merging approach adds the necessary protective function without creating entirely separate components, thus limiting the increase in device complexity.
Data Source
AI summary
An electronic component includes a multilayer body, first to fourth outer electrodes, a pair of first insulating coating portions, and a pair of second insulating coating portions. The pair of first insulating coating portions is in at least one of a state in which inner end portions are in contact with the third outer electrode and a state in which outer end portions are in contact with the first outer electrode and the second outer electrode. The pair of second insulating coating portions is in at least one of a state in which inner end portions are in contact with the fourth outer electrode and a state in which outer end portions are in contact with the first outer electrode and the second outer electrode.