Multilayer Inductor with Outer Electrode Ends
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Solution Overview
Problem
Existing multilayer inductors face challenges in achieving a large inductance value due to the internal structure, where downstream and upstream ends of the inner electrodes interfere with the magnetic flux, making it difficult to realize high inductance values.
Innovation Solution
The electronic component features a multilayer body with insulator layers and inductor conductor layers arranged in an annular track configuration, where the inductor conductor layers are superposed with connection conductor layers, allowing for a larger inductance value by avoiding internal conductor interference with the magnetic flux.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the downstream ends and upstream ends of the inner electrodes are bent toward the inside of the region enclosed by the inner electrodes, then the inductor can be formed with a compact structure, but the inductance value becomes difficult to increase due to magnetic flux disturbance
Solution Approach 1:
The patent extracts the problematic conductor ends from the interior region by extending them to the outer periphery of the multilayer body. Instead of bending the downstream ends of first inner electrodes and upstream ends of second inner electrodes toward the inside, these ends are positioned at the outer perimeter, removing their harmful effect on magnetic flux while preserving the compact multilayer structure.
Solution Approach 2:
The patent utilizes the stacking direction (vertical dimension) to arrange multiple groups of inner electrodes, with each group having conductor ends extending to the outer periphery. This three-dimensional arrangement allows the magnetic flux to pass through the interior region without obstruction from conductor ends, effectively using the vertical stacking to resolve the two-dimensional flux disturbance problem.
2Reliability
If multiple inner electrodes are stacked to increase inductance, then the inductance value can be increased, but the direct-current resistance increases and heat dissipation becomes poor
Solution Approach 1:
The patent merges multiple first inner electrodes and second inner electrodes in parallel within each group, connecting their downstream and upstream ends respectively. This parallel configuration increases the effective conductor cross-sectional area, reducing direct-current resistance while maintaining high inductance through the combined magnetic effect of multiple electrodes.
Solution Approach 2:
The patent employs a composite structure combining multiple conductor materials (first inner electrodes and second inner electrodes with different winding directions) and insulator materials (resin layers and ferrite sheets) to achieve optimized electrical and magnetic properties. The alternating arrangement of conductors with opposite winding directions creates beneficial magnetic field cancellation effects that reduce losses.
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 configuration enables a significant increase in inductance value while reducing direct-current resistance and enhancing heat dissipation and direct-current superposition characteristics, allowing for more efficient operation.
Implementation Method 1
an inductor that is provided in the multilayer body. The inductor includes a plurality of first inductor conductor layers, a plurality of second inductor conductor layers and a plurality of connection conductor layers
Data Source
AI summary
An electronic component includes a plurality of groups arrayed in a stacking direction, each including a first inductor conductor layer, a second inductor conductor layer, a connection conductor layer and a first insulator layer. In each group, the first insulator layer is provided between a first superposed portion of the first inductor conductor layer and a second superposed portion of the second inductor conductor layer. The connection conductor layer is provided at the same position as the first insulator layer in the stacking direction, and electrically connects the first non-superposed portion and the second non-superposed portion included in the same group to each other. Among two adjacent groups in the stacking direction, a second superposed portion included in a group on another side in the stacking direction and a first superposed portion included in a group on one side in the stacking direction are physically connected to each other.