Inductor Surface Electrode Plating for Thermal Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing inductor components face challenges in thermal dissipation characteristics at the connection points between metal pins and outer electrodes, leading to potential heat-related issues and decreased connection reliability when current flows through the inductor electrode.
Innovation Solution
The inductor component design incorporates a surface electrode formed by plating over a base electrode composed of conductive paste, with the surface electrode having a larger cross-sectional area on the outer side than the inner side, enhancing thermal conductivity and dissipation, and is structured to prevent the outer electrode from detaching from the insulating layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conductive paste outer electrode is used for external connection, then ease of manufacture is improved, but thermal dissipation characteristics deteriorate due to larger resistivity and lower thermal conductivity
Solution Approach 1:
The outer electrode is constructed as a composite structure with a base electrode layer made of conductive paste and a surface electrode layer made of metal material plated on top. This composite structure combines the manufacturing advantages of conductive paste with the superior thermal and electrical conductivity of metal, resolving the contradiction between ease of manufacture and thermal dissipation characteristics.
Solution Approach 2:
The surface electrode layer is selectively formed on specific portions of the base electrode where high current flows and heat generation occurs. This local application of high-conductivity metal material optimizes thermal dissipation at critical hot spots while maintaining the overall composite structure, addressing the thermal dissipation issue without compromising manufacturing ease.
2Reliability
If metal pins are used instead of through-hole conductors, then resistivity is reduced and thermal conductivity is increased, but heat production at connection points worsens when connected to conductive paste outer electrode
Solution Approach 1:
The composite outer electrode structure with metal surface plating provides a low-resistivity, high-thermal-conductivity interface that matches well with metal pins. This reduces the thermal barrier at the connection point between metal pins and outer electrode, minimizing heat generation and improving reliability.
Solution Approach 2:
The metal surface electrode layer acts as an intermediary between the metal pin and the conductive paste base electrode. It provides a thermal and electrical conduit that facilitates efficient heat transfer from the metal pin connection point to the larger base electrode area, reducing localized heat accumulation.
3Productivity
If the inductor component size is reduced, then productivity is improved and device integration is enhanced, but thermal dissipation capability worsens due to smaller heat dissipation area
Solution Approach 1:
The surface electrode layer is concentrated on the outer peripheral portion of the base electrode where heat dissipation to the substrate occurs. This localized enhancement of thermal conductivity at the heat dissipation interface maximizes thermal management efficiency in the miniaturized component, addressing the thermal dissipation challenge without increasing overall component size.
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 improves thermal dissipation characteristics by effectively dissipating heat generated at the connection points, reducing the risk of connection failures and enhancing the reliability and electrical performance of the inductor component.
Implementation Method 1
The surface electrode formed by plating has a higher thermal conductivity than that of the base electrode composed of a conductive paste, and therefore, the thermal dissipation characteristics in the case where heat is produced in the connection portion improve
Implementation Method 2
a surface electrode formed on the base electrode by plating
Data Source
AI summary
An inductor component including an inductor electrode includes an insulating layer and an outer electrode for external connection formed on the upper surface of the insulating layer. The inductor electrode includes a metal pin for input/output that has an upper end surface connected to the outer electrode and that is embedded in the insulating layer. The outer electrode includes a base electrode formed on the upper surface of the insulating layer and composed of a conductive paste, and a surface electrode formed on the base electrode by plating. The surface electrode is formed such that the area of a cross section thereof perpendicular to the thickness direction on an outer layer side away from the base electrode is larger than the area of a cross section thereof perpendicular to the thickness direction on an inner layer side close to the base electrode.