Inductor Terminal Electrode Design for Mounting Stability
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Solution Overview
Problem
As electronic devices become smaller, the reduced size of inductor components leads to decreased terminal electrode areas, resulting in a lower fixing force between the inductor component and the circuit board, making secure mounting challenging.
Innovation Solution
The inductor component design includes a core with terminal electrodes that have increased surface areas, specifically with a central portion of the end electrode section being higher than the end portions and a convex arc-shaped top edge, along with a wire wound around the shaft connected to these electrodes, enhancing the fixing force by increasing the surface area for connection to the circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the inductor component size is reduced, then the device can be made smaller, but the terminal electrode area decreases resulting in lower fixing force
Solution Approach 1:
The terminal electrode is designed with a three-dimensional structure featuring a first electrode section, a second electrode section extending in the height direction, and a third electrode section extending in the width direction. This multi-dimensional configuration increases the effective surface area of the terminal electrode without increasing the overall footprint of the inductor component, thereby maintaining strong fixing force while enabling compact device size.
Solution Approach 2:
The top edge of the end electrode section is designed with a convex arc shape rather than a straight line. This curved configuration increases the surface area of the terminal electrode in a compact manner, enhancing the fixing force between the inductor component and the circuit board while maintaining a small overall component size.
2Area of stationary object
If the end electrode section height is increased to increase surface area, then fixing force improves, but wire and solder interference risk increases
Solution Approach 1:
The terminal electrode is designed with different sections having different heights and functions: the first electrode section provides a base area, the second electrode section extends upward to increase surface area for fixing, and the third electrode section extends in the width direction. This localized differentiation allows the electrode to achieve sufficient surface area for strong fixing force while controlling the height in specific regions to minimize interference with wire and solder during mounting.
Solution Approach 2:
The convex arc-shaped top edge of the end electrode section gradually increases the surface area compared to a straight edge, providing enhanced fixing force while maintaining a controlled profile that reduces the risk of interference with wire and solder during the mounting process.
Data Source
AI summary
An inductor component comprises a core including a substantially column-shaped shaft and a support formed on an end portion of the shaft, and a terminal electrode formed on the support. The terminal electrode includes a side electrode section on a side face of the support and an end electrode section on an end face of the support. An end portion of the end electrode section adjacent to the side face is higher than an end portion of the side electrode section adjacent to the end face.