Multilayer Inductor Element with Parallel Linear Conductors
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Solution Overview
Problem
The existing inductor elements, particularly antenna coils with a resin film wound around a ferrite core, have limited operation performance.
Innovation Solution
An inductor element is designed with a multilayer body of stacked sheets, each with linear conductors and via-hole conductors, where the linear conductors on adjacent sheets have a common pattern, enhancing heat dissipation and reducing DC resistance by connecting in parallel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a resin film is simply wound around a ferrite core, then the structure is simple and easy to manufacture, but the operation performance is limited
Solution Approach 1:
The patent transitions from a single-layer wound structure to a multilayer stacked configuration. Multiple sheets with linear conductors are stacked in the thickness direction to form a three-dimensional inductor structure, enabling parallel conductor connections that reduce DC resistance and improve operation performance while maintaining manufacturing simplicity through standardized sheet stacking
Solution Approach 2:
The patent combines multiple sheets with linear conductors into a single multilayer body. The linear conductors on different sheets are connected in parallel through the stacking arrangement, merging their electrical functions to reduce overall DC resistance and enhance operational characteristics without complicating the manufacturing process
2Reliability
If multiple sheets with common conductor patterns are stacked, then heat dissipation performance is enhanced and DC resistance is reduced, but the device complexity increases
Solution Approach 1:
The patent divides the inductor into multiple discrete sheets, each containing linear conductors arranged in specific patterns. These segmented sheets are stacked to form the complete inductor, with the segmentation enabling parallel electrical connections that reduce DC resistance while the modular nature keeps the overall design manageable
Solution Approach 2:
The patent changes the geometric parameters of the conductor arrangement by stacking sheets with specific linear conductor patterns at defined intervals. The common pattern design and systematic stacking arrangement optimize the electrical parameters (reducing DC resistance) while maintaining controllable device complexity through standardized configurations
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 enhances heat dissipation and operation performance by reducing DC resistance components, leading to improved performance of the inductor element.
Implementation Method 1
a plurality of via-hole conductors or side-surface conductors that are disposed with the multilayer body so as to connect the plurality of linear conductors to one another and form an inductor
Implementation Method 2
with a pattern of a plurality of linear conductors being common among at least two sheets, a plurality of protrusions having a pattern corresponding to this pattern are formed on a principal surface of an inductor element. Accordingly, the heat dissipation performance is enhanced
Data Source
AI summary
A multilayer body 12 includes nonmagnetic sheets SH1a and SH1b each having an upper surface provided with a plurality of linear conductors 16, a magnetic sheet SH3 having an upper surface provided with a plurality of linear conductors 18a, and a nonmagnetic sheet SH4 having an upper surface provided with a plurality of linear conductors 18b, which are stacked one on top of another. Via-hole conductors or side-surface conductors are disposed with the multilayer body 12 so as to connect these linear conductors to one another and form an inductor. The plurality of linear conductors have a pattern that is common among at least two sheets adjacent to each other in a stacking direction.