Multilayer Capacitor Metal Frame Mounting Stability
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Solution Overview
Problem
Multilayer capacitors used in automotive applications face challenges with thermal, electrical, and mechanical reliability due to vulnerability to vibrations and deformation, leading to potential reversal defects when mounted on substrates, as the center of gravity is disrupted by the metal frame support.
Innovation Solution
The electronic component design includes a body with external electrodes and metal frames that have a support portion bonded to the electrodes and a mounting portion extending from the lower end, where the length of the mounting portion in the second direction is greater than the body's dimensions, ensuring a secure connection and preventing reversal defects by maintaining stability during mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the multilayer capacitor is supported by the metal frame and floated on the top of the substrate, then the durability against vibrations and deformation is improved, but the center of gravity is located at the top causing reversal defect when mounted
Solution Approach 1:
The mounting portion extends in the first direction (vertical dimension) from the support portion, creating a dimensional transition that relocates the center of gravity downward toward the substrate while maintaining the floating support structure. This dimensional extension resolves the contradiction by achieving both vibration durability and gravitational stability.
Solution Approach 2:
The metal frame is designed with non-uniform dimensions where the mounting portion has different length characteristics compared to the support portion. Specifically, the length in the first direction and the length in the second direction are optimized differently to achieve both structural integrity for vibration resistance and proper center of gravity positioning for mounting stability.
2Stability of the object's composition
If the mounting portion length is increased to prevent reversal defect, then the stability during mounting is improved, but the mounting area becomes excessively large
Solution Approach 1:
The patent optimizes the dimensions of the mounting portion by establishing specific relationships between the length in the first direction and the length in the second direction. By controlling these parameters within defined ratios and proportions, the design achieves adequate mounting stability while preventing excessive mounting area. The parameter optimization ensures the mounting portion is sufficiently large for stability but not excessively large.
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 the durability and reliability of multilayer capacitors against vibrations and deformation, preventing reversal defects by maintaining stability and distributing stress effectively during substrate mounting, while optimizing the mounting area to avoid excessive protrusion.
Implementation Method 1
A conductive adhesive portion may be disposed between the head portion of the external electrode and the support portion
Data Source
AI summary
An electronic component includes a body; external electrodes respectively disposed on opposing surfaces of the body in a first direction thereof; and a pair of metal frames connected to the external electrodes, respectively, in which each of the metal frames 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 greater than a length of the body in the second direction.