Metal Frame Mounting Portion Width for Acoustic Noise Reduction
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Solution Overview
Problem
Multilayer capacitors used in automotive systems face challenges with thermal, electrical, and mechanical reliability due to direct contact with substrates, leading to acoustic noise and potential short circuits when metal frames are misaligned during mounting.
Innovation Solution
The electronic component design includes a body with external electrodes and metal frames that have a support portion bonded to the electrodes, with a mounting portion extending from the lower end, spaced apart from the body, and a narrower width than the body, to prevent contact with adjacent land patterns and reduce acoustic noise, while maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the metal frame width is increased to improve mounting stability, then mechanical reliability is improved, but the mounting portion contacts adjacent land patterns causing short circuits
Solution Approach 1:
Different sections of the metal frame have different widths optimized for their specific functions: the body support portion has a larger width for mechanical strength and stability, while the mounting portion has a smaller width to prevent contact with adjacent land patterns.
2Volume of moving object
If the metal frame is positioned closer to the body for compactness, then device size is reduced, but acoustic noise increases due to vibration transfer
Solution Approach 1:
The metal frame extends in the thickness direction (first direction) to provide adequate spacing between the capacitor body and substrate, while controlling its width (second direction) to maintain compactness. This dimensional differentiation allows simultaneous achievement of noise reduction and space efficiency.
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 enhances durability and reliability against vibration and deformation, reduces acoustic noise, and prevents short circuits by maintaining the metal frame's position, ensuring improved thermal and mechanical reliability and increased mounting density.
Implementation Method 1
a support portion bonded to the external electrodes
Data Source
AI summary
An electronic component includes a body in which external electrodes are disposed on opposing surfaces of the body in a first direction thereof, respectively; and a pair of metal frames connected to the external electrodes, respectively, wherein the metal frame includes a support portion bonded to the external electrodes, and a mounting portion extending in the first direction from a lower end of the support portion and spaced apart from the body and the external electrodes, and a length of the mounting portion in a second direction perpendicular to the first direction is smaller than a length of the body in the second direction.