Coil Component Electrode Layout for Short-Circuit Prevention
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Solution Overview
Problem
Miniaturization of electronic devices leads to increased risk of short-circuits due to external electrodes of coil components coming into contact with other components on mounting boards, as their overall length or width is increased by electrode thickness.
Innovation Solution
A coil component design featuring a body with slit portions exposing lead-out patterns, spaced external electrodes, and a surface insulating layer to prevent short-circuits, while maintaining a compact size and improving bonding strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external electrodes are formed on two surfaces of the body to provide electrical connection, then electrical connectivity is improved, but the overall length or width of the coil component increases due to electrode thickness
Solution Approach 1:
The patent transitions from forming external electrodes on opposite surfaces (requiring sufficient body thickness) to forming them on adjacent surfaces of the same face. This dimensional reconfiguration allows electrodes to be positioned on the same mounting plane without increasing the body's thickness, thereby resolving the contradiction between electrical connectivity and compact dimensions.
2Volume of moving object
If external electrodes are positioned closer together to reduce component size, then miniaturization is achieved, but the risk of short-circuit with adjacent components increases
Solution Approach 1:
The patent introduces a groove structure as an intermediary element between the external electrodes and adjacent components. This groove creates a physical separation or clearance zone that prevents short-circuits while allowing the electrodes to be positioned closer together, thus enabling miniaturization without compromising reliability.
3Volume of moving object
If the body size is reduced to achieve miniaturization, then device compactness is improved, but the bonding strength between external electrodes and the body may be compromised
Solution Approach 1:
The patent segments the body structure by introducing grooves that create distinct regions for electrode bonding. This segmentation allows for optimized bonding surfaces and structures within the compact body, ensuring adequate bonding strength is maintained even as overall component size is reduced.
Data Source
AI summary
A coil component includes a body; a support substrate disposed in the body; a coil portion including a first coil pattern, a first lead-out pattern, and a second lead-out pattern; a first slit portion defined at a corner portion between the first end surface and the first surface, and a second slit portion defined at a corner portion between the second end surface and the first surface, the first and second slit portions exposing the first and second lead-out patterns; a first external electrode and a second external electrode spaced apart from each other on the first surface, and respectively extending onto the first and second slit portions to be connected to the first and second lead-out patterns; and a surface insulating layer disposed on the first and second slit portions to cover a portion of the first and second external electrodes and extending onto the first surface.