Multilayer Coil Component with Determination Marks
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Solution Overview
Problem
Existing multilayer inductors face challenges in determining the location of outer electrodes for minimizing stray capacitance, as visual inspection and automatic determination are difficult due to the complex geometry of the multilayer body.
Innovation Solution
A multilayer coil component with a multilayer body formed of laminated insulating layers and coil conductors, featuring first and second outer electrodes that are electrically connected to the coil, with determination marks on the surface to facilitate the identification of electrode locations, allowing for easier formation and mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the outer electrode is formed on a part of the end surface or side surface to decrease stray capacitance, then the stray capacitance between the coil and outer electrode is reduced, but the location determination becomes difficult for visual inspection and automatic sensing
Solution Approach 1:
A determination mark is introduced as an intermediary element on the surface of the multilayer body. This mark serves as a visual and detectable indicator that mediates between the hidden electrode location and the external observation system, allowing automatic sensors to easily identify electrode positions without direct visualization of the electrode itself.
Solution Approach 2:
The determination mark utilizes visual contrast (color or reflectivity differences) to indicate the location of outer electrodes. By creating a visible mark on the surface that corresponds to the electrode position, the system enables easy visual inspection and automatic optical detection of electrode locations.
2Object-affected harmful factors
If the axial direction of the coil is perpendicular to the outer electrode to decrease stray capacitance, then the stray capacitance is reduced, but the complexity of determining electrode location increases
Solution Approach 1:
The determination mark acts as an intermediary that simplifies the complex spatial relationship between the coil and outer electrode. Instead of requiring complex calculations or sophisticated sensing to determine electrode location based on the perpendicular arrangement, the mark provides a direct visual and detectable reference point on the multilayer body surface.
3Ease of operation
If visual inspection is used to determine outer electrode location, then the process is simple, but automatic determination with sensors cannot be achieved
Solution Approach 1:
The determination mark serves as a universal intermediary that works with both human visual inspection and automatic sensor detection. The mark can be detected by simple optical sensors, enabling automation while maintaining the simplicity of visual identification for manual processes.
Solution Approach 2:
By using visual contrast markers, the system enables both human visual inspection and automatic optical sensing. The color or reflectivity difference of the mark makes it easily detectable by simple optical sensors, facilitating automation without complicating the visual inspection process.
Data Source
AI summary
A multilayer coil component includes a multilayer body that is formed of laminated insulating layers and that contains a coil, and a first outer electrode and a second outer electrode that are electrically connected to the coil. The coil is formed of coil conductors. The first outer electrode covers a part of a first end surface of the multilayer body, extends from the first end surface, and covers a part of a first main surface thereof. The second outer electrode covers a part of a second end surface of the multilayer body, extends from the second end surface, and covers a part of the first main surface. A lamination direction of the multilayer body and an axial direction of the coil are parallel to a mounting surface. Determination marks are formed on surfaces of the multilayer body at locations at which the first and second outer electrodes are formed.