Symmetrical Coil Component for Inductor Array Consistency
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Solution Overview
Problem
There is a demand for non-coupled inductor array chips with coils having the same inductance value, as existing products face inefficiencies due to varying inductance values among coils, which affects mounting area and performance.
Innovation Solution
A coil component design featuring a magnetic body with symmetrical coil parts on either surface of a substrate, connected to external electrodes, ensuring each coil part has the same inductance value through higher coil density near the central portion and lower density near the ends, reducing mutual magnetic flux effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If coils are disposed spaced apart to be non-coupled, then mounting area is reduced, but inductance values become inconsistent among coils
Solution Approach 1:
The patent applies local quality by varying the coil density distribution within each coil structure. Specifically, adjacent coils are designed with different coil density patterns (first coil density for odd-numbered coils, second coil density for even-numbered coils), allowing each coil to achieve consistent inductance values despite being spatially separated and non-coupled. This local variation in coil density compensates for the spacing effect and ensures uniform electrical characteristics across all coils.
2Manufacturing precision
If coil density is increased near central portion, then inductance value is improved, but manufacturing complexity increases
Solution Approach 1:
The patent employs asymmetry by deliberately creating different coil density distributions in adjacent coils. Odd-numbered coils have a first coil density pattern while even-numbered coils have a second coil density pattern, with both patterns being asymmetric relative to their respective central portions. This asymmetric design allows precise control over inductance values while maintaining manufacturing feasibility through systematic variation rather than complex individual customization.
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 efficiency of the inductor array chip by ensuring all coils have equal inductance, reducing the mounting area and improving performance, while maintaining high current handling capabilities.
Implementation Method 1
coils are disposed to be spaced apart from each other such that they are not mutually affected by magnetic fluxes generated thereby
Data Source
AI summary
There are provided a coil component and a board having the same. The coil component includes: a magnetic body including first and second coil parts disposed to be symmetrical to each other on one surface of a substrate on the basis of a central portion of the magnetic body and third and fourth coil parts disposed to be symmetrical to each other on the other surface of the substrate on the basis of the central portion of the magnetic body; and first to fourth external electrodes disposed on outer surfaces of the magnetic body and connected to the first to fourth coil parts.