Multilayer Chip Inductor Coil Layout for Resistance Variation Control
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Solution Overview
Problem
Multilayer chip inductors face variations in resistance value due to the division of via hole conductors during the cutting of mother laminates, affecting the consistency of the coil's inductance value.
Innovation Solution
The electronic component features a coil with via hole conductors that are not divided, positioned outside the coil's magnetic flux path, allowing for a larger coil area and reduced resistance variation by maintaining a fixed proximity to the coil conductors, thus enhancing inductance and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If via hole conductors are formed by dividing a cylindrical conductor into two parts, then the coil area can be enlarged to achieve high inductance value, but the resistance value between external electrodes varies due to variation in cut position
Solution Approach 1:
The via hole conductor is divided into two separate via hole conductors (first and second via hole conductors) that are positioned at different locations. This segmentation allows each via hole conductor to be independently formed with consistent dimensions, eliminating resistance variation caused by cutting position shifts while still enabling the coil area to be enlarged for high inductance value.
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 achieves a higher inductance value with reduced resistance variation, as the via hole conductors do not block magnetic flux and maintain insulation, allowing for a larger coil area and improved direct current superposition characteristics.
Implementation Method 1
a coil L, and via hole conductors V1 and V2... the coil L is a spiral coil having a coil axis extending in the lamination direction
Data Source
AI summary
An electronic component includes overlapping coils in a rectangular laminate to form a substantially annular orbit. The orbit passes about an intersection of diagonal lines of an insulator layer of the laminate and is divided into a first orbit portion and a second orbit portion by a straight line parallel to a short side of the insulator layer. When an orbit obtained by the axisymmetric movement of the first orbit portion relative to the straight line is defined as a third orbit portion, a part of the second orbit portion overlaps with a part of the third orbit portion, and the non overlapped portion of the second orbit portion is positioned closer to the intersection than the non overlapped portion of the third orbit portion. A via hole conductor is provided in a region outboard an outer side of the non overlapping portion of the second orbit portion and inboard an outer side of the non overlapping portion of the third orbit portion.