Metal Core PCB Thermal Management for Heating Elements
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Solution Overview
Problem
High-power electronic components, such as light sources in electronic devices, generate excessive heat, which can damage or fail heat-sensitive components and reduce the operational efficiency and lifespan of both the component and surrounding components.
Innovation Solution
A circuit board module with a metal core printed circuit board and a heating element, where the heating element is disposed on the metal core printed circuit board, allowing for efficient heat dissipation to the substrate while minimizing cost by only applying the metal core printed circuit board to specific areas, thus reducing thermal conductivity mismatch with the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a metal core printed circuit board is used to dissipate heat from the heating element, then the temperature control of the heating element is improved, but the cost and complexity of the circuit board module increases
Solution Approach 1:
The patent applies the metal core printed circuit board only in the assembling region where the heating element is located, rather than using it for the entire circuit board. This localized application provides effective heat dissipation where needed while avoiding the unnecessary cost and complexity of using metal core PCB throughout the entire device.
Solution Approach 2:
The circuit board is divided into two distinct regions: an assembling region with metal core printed circuit board for heat dissipation, and other regions with conventional substrate. This segmentation allows the system to achieve thermal management benefits only where required, balancing performance with cost and complexity considerations.
2Temperature
If a metal core printed circuit board is used across the entire substrate, then heat dissipation is maximized, but the cost of the circuit board module increases significantly
Solution Approach 1:
The metal core printed circuit board is applied only in the assembling region where thermal management is critical, rather than across the entire substrate. This localized approach provides sufficient heat dissipation for the heating element while significantly reducing material costs and manufacturing complexity compared to full-coverage metal core PCB.
Solution Approach 2:
Instead of applying thermal management solutions uniformly across the entire substrate (excessive action), the patent applies the metal core printed circuit board only to the extent necessary for effective heat dissipation (partial action), achieving cost-effective thermal management.
3Temperature
If the substrate has high thermal conductivity, then heat from the heating element is dissipated quickly, but heat-sensitive components on the substrate may be damaged
Solution Approach 1:
The metal core printed circuit board creates a localized thermal management zone around the heating element, providing rapid heat dissipation where needed while the conventional substrate in other regions maintains lower thermal conductivity, protecting heat-sensitive components from thermal damage.
Solution Approach 2:
The circuit board module is segmented into a thermal management zone (metal core PCB) and a protected zone (conventional substrate), allowing differential thermal properties in different regions to simultaneously achieve effective heat dissipation and component protection.
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 effectively prevents overheating of the heating element and adjacent components, enhancing operational efficiency and extending the lifespan of the electronic device while reducing costs by targeted thermal management.
Implementation Method 1
the thermal conductivity of the metal core printed circuit board is greater than a thermal conductivity of the substrate
Data Source
AI summary
A circuit board module includes a circuit board, a metal core printed circuit board, and a heating element. The circuit board includes a substrate, and a surface of the substrate has an assembling region. The metal core printed circuit board is on the assembling region and includes a first circuit layer and a second circuit layer. The first circuit layer and the second circuit layer are electrically connected to each other. The second circuit layer is electrically connected to the circuit board. The thermal conductivity of the metal core printed circuit board is greater than the thermal conductivity of the substrate. The heating element is on the metal core printed circuit board and is electrically connected to the first circuit layer. An electronic device having the circuit board module is also provided.