Multilayer Capacitor Metal Frame Segmentation for Short Circuit Prevention
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Solution Overview
Problem
Multilayer capacitors used in automotive applications face challenges in thermal, electrical, and mechanical reliability, particularly in preventing short circuits due to distortion of metal frames during mounting on substrates, which affects their performance and durability.
Innovation Solution
The design includes a capacitor array with multiple multilayer capacitors arranged in a specific configuration, connected by first and second metal frames with support and mounting portions, and conductive adhesive portions to secure the capacitors and prevent short circuits by maintaining a specific area ratio of cutting to mounting portions, ensuring reliable attachment and preventing contact with land patterns of different polarities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multilayer capacitors are stacked in a modular configuration to increase capacity, then the capacitance increases, but the metal frame becomes more susceptible to distortion and short circuit defects during mounting
Solution Approach 1:
The mounting portion of the metal frame is divided into multiple distinct portions (first mounting portion and second mounting portion) that are spatially separated and have different lengths. This segmentation allows each portion to independently accommodate distortion without causing short circuits, while still maintaining electrical connectivity for the modular capacitor stack.
Solution Approach 2:
Different portions of the metal frame are given different lengths and configurations tailored to their specific functions. The first mounting portion has a different length than the second mounting portion, allowing each to optimize its local performance for mounting stability and short circuit prevention respectively, rather than using a uniform design throughout.
2Reliability
If the metal frame is designed with extended mounting portions for secure attachment, then the mounting reliability improves, but the risk of contact with land patterns of different polarities increases
Solution Approach 1:
The mounting portion is segmented into multiple separate portions with different lengths and spatial positions. This segmentation ensures that even if one portion contacts a land pattern, the other portions are positioned to avoid contact, thereby preventing short circuits while maintaining secure mounting through the collective action of all portions.
Solution Approach 2:
The first mounting portion and second mounting portion are designed with asymmetric lengths and configurations. This asymmetry allows the frame to be optimized for both secure mounting attachment and avoidance of harmful contacts with land patterns, as each portion can be tailored to its specific functional requirements rather than using a symmetric uniform design.
Data Source
AI summary
An electronic component includes: a capacitor array including a plurality of multilayer capacitors which are sequentially arranged in a first direction, and first and second metal frames disposed on both side surfaces of the capacitor array and connected to first and second external electrodes of the plurality of multilayer capacitors, respectively; the first and second metal frames include first and second support portions, and first and second mounting portions, respectively; and the first and second mounting portions include first and second portions opposing each other toward the center of the capacitor array, and third and fourth portions positioned outside the first and second portions, respectively, and a length of each of the first and second portions is shorter than a length of each of the third and fourth portions.