Coil Component Surface Roughness Layout to Reduce Static Adhesion

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Solution Overview

Problem

Miniaturized coil components tend to adhere to other components due to static electricity, making handling and mounting inefficient, especially when external electrodes are flush with the base body surface, reducing the gap and increasing adhesion likelihood.

Innovation Solution

A coil component design featuring a base body with a first surface divided into regions, where the third region is rougher than the first and second regions, reducing electrostatic forces and adhesion by weakening the electrostatic charge on the mounting surface, and external electrodes are connected to the coil conductor ends, with the option of recesses and flush configurations to minimize contact area.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If the thickness of external electrodes is reduced or they are embedded flush with the base body surface to miniaturize the coil component, then the size of the coil component is reduced, but the gap between the coil component and other components is reduced, making the coil component more likely to adhere to other components due to static electricity

Engineering Contradiction:

Improvesize of coil componentVSAvoidadhesion to other components

Core Design Contradiction:

Volume of moving objectVSObject-affected harmful factors

Solution Approach 1:

The base body surface is divided into different regions with different roughness characteristics. The first region (under the first external electrode) and second region (under the second external electrode) have different surface roughness from the third region (between the electrodes). This local differentiation of surface properties allows the coil component to maintain miniaturization while controlling adhesion in specific areas, particularly reducing adhesion in the third region where no electrode is present.

Inventive Principle:

Principle #3Local quality

2Volume of moving object

If the external electrodes are embedded in the base body to be flush with the surface, then the coil component is miniaturized, but the contact area with other components increases, increasing the likelihood of adhesion

Engineering Contradiction:

Improvecoil component sizeVSAvoidcontact area with other components

Core Design Contradiction:

Volume of moving objectVSArea of stationary object

Solution Approach 1:

Different regions of the base body surface have different roughness to locally control contact characteristics. The third region between the external electrodes has different surface roughness compared to the regions under the electrodes, allowing optimization of contact area and adhesion resistance in the inter-electrode region while maintaining flush mounting for miniaturization.

Inventive Principle:

Principle #3Local quality

3Volume of moving object

If the coil component is miniaturized, then it can be mounted in miniaturized electronic circuits, but it adheres to gripping members of mounters and tweezers due to static electricity, making handling and mounting inefficient

Engineering Contradiction:

Improvecoil component sizeVSAvoidhandling efficiency

Core Design Contradiction:

Volume of moving objectVSEase of operation

Solution Approach 1:

The surface roughness is locally optimized in the third region between the external electrodes to reduce electrostatic charge accumulation. This local modification of surface properties specifically addresses the handling issue by reducing adhesion to gripping members during transfer operations, while maintaining the overall miniaturized form factor of the coil component.

Inventive Principle:

Principle #3Local quality

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

The design significantly reduces the likelihood of the coil component adhering to other components, enhancing handling and mounting efficiency by minimizing electrostatic forces and contact area, while maintaining effective electrical connections.

Implementation Method 1

A first surface of the base body has a first region, a second region, and a third region provided between the first region and the second region and rougher than the first region and the second region... reducing electrostatic forces and adhesion by weakening the electrostatic charge on the mounting surface

Methodology Applied

Scientific EffectElectrostatic force: Electrostatics

Data Source

PatentUS20240258013A1Coil component, circuit module, electronic device, and method of manufacturing coil component

Publication Date: 2024.08.01 TAIYO YUDEN KK

AI summary

Provided is a coil component including a base body having a first surface and including an insulating material, the first surface having a first region, a second region, and a third region provided between the first region and the second region and rougher than the first region and the second region, a coil conductor provided in the base body, a first external electrode connected to one end of the coil conductor and provided on the base body in the first region, and a second external electrode connected to another end of the coil conductor and provided on the base body in the second region.