Hybrid Heat-Radiating Substrate with Oxide Insulating Core
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Solution Overview
Problem
Existing heat-radiating substrates face challenges in achieving high density and integration while protecting thermally weakened elements from heat generated by heat-generating elements, as heat is transferred to the entire substrate, degrading the performance of vulnerable components.
Innovation Solution
A hybrid heat-radiating substrate is developed with a metal core layer and an oxide insulating core layer formed through volume anodizing, which is integrated with the metal core layer, along with a circuit layer that separates heat-generating and thermally weakened elements, using alumina for the oxide layers and aluminum for the metal core, to prevent heat transfer and maintain performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a heat-radiating substrate using metal materials with good thermal conductivity is used, then heat-radiating performance is improved, but thermally weakened elements are degraded due to heat transfer to the entire substrate
Solution Approach 1:
The substrate is divided into distinct regions: a metal core layer for heat radiation and an oxide insulating core layer for thermal isolation. This segmentation allows heat-generating elements to be positioned on the metal layer while thermally weakened elements are positioned on the oxide layer, resolving the contradiction between heat-radiating performance and protection of thermally weakened elements.
Solution Approach 2:
Different regions of the substrate are assigned different thermal properties. The metal core layer provides high thermal conductivity for heat radiation, while the oxide insulating core layer provides low thermal conductivity for thermal isolation. This local differentiation of material properties allows simultaneous optimization for both heat-radiating performance and protection of thermally weakened elements.
2Loss of energy
If a heat-radiating substrate with metal core layer is used, then heat-radiating property is improved, but high density/integration is difficult to implement
Solution Approach 1:
The oxide insulating core layer is formed by volume anodizing directly on the metal core layer, merging two functional layers into a single integrated structure. This eliminates the need for separate assembly steps and complex bonding processes, thereby improving manufacturability while maintaining both heat-radiating performance and high density integration capability.
3Adaptability or versatility
If heat generating elements and thermally weakened elements are mounted on the same substrate, then device integration is improved, but performance of thermally weakened elements is degraded due to heat transfer
Solution Approach 1:
The substrate is segmented into a metal core layer region for heat-generating elements and an oxide insulating core layer region for thermally weakened elements. This spatial segmentation enables both element types to coexist on the same substrate while preventing harmful heat transfer between them, thus maintaining both integration and reliability.
Solution Approach 2:
The oxide insulating core layer acts as a thermal intermediary barrier between the metal core layer and the thermally weakened elements. This intermediary layer blocks heat transfer paths while allowing electrical connections and mechanical mounting, thereby protecting thermally weakened elements without compromising device integration.
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 solution effectively dissipates heat from heat-generating elements while isolating thermally weakened components, maintaining their performance and improving substrate stability and manufacturing efficiency by directly forming the oxide insulating core layer on the metal core layer.
Implementation Method 1
forming an oxide insulating core layer by performing volume anodizing on the metal core member in a thickness direction
Implementation Method 2
forming an oxide insulating layer by performing surface anodizing on one surface or both surfaces of the metal core member
Implementation Method 3
heat generated from the heat generating elements is transferred to the entire heat-radiating substrate (in particular, through a metal core layer)
Implementation Method 4
an oxide insulating core layer having lower thermal conductivity than the metal core layer that is integrally formed with the metal core layer by volume anodizing
Data Source
AI summary
Disclosed herein are a hybrid heat-radiating substrate including a metal core layer; an oxide insulating core layer that is formed in a thickness direction of the metal core layer to have a shape where the oxide insulating core layer is integrally formed with the metal core layer, an oxide insulating layer that is formed on one surface or both surfaces of the metal core layer, and a circuit layer that is configured to include first circuit patterns formed on the oxide insulating core layer and second circuit patterns formed on the oxide insulating layer, and a method of manufacturing the same.