Monolithic Thermal EMI Shield for Electronic Devices
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Solution Overview
Problem
Electronic devices face challenges with thermal energy and electromagnetic interference (EMI) leakage through seams between discrete cans, which can damage components and affect performance.
Innovation Solution
An electronic device design featuring a single-piece metallic shield integrated with fan assemblies and housing, providing airtight seals to enhance thermal dissipation and block EMI, with airflow directed through a grill for efficient cooling and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If discrete cans are used to cover components, then each component can be individually protected, but thermal energy and electromagnetic energy leak through the seams between adjacent cans
Solution Approach 1:
The patent combines multiple discrete shielding cans into a single integrated shield structure that covers multiple components. This merging eliminates the seams between adjacent cans that cause thermal and EMI leakage, while still providing individual protection for each component through internal partitions or positioning features within the unified shield.
2Ease of manufacture
If multiple discrete cans are used, then assembly can be simplified, but the number of seams increases creating more EMI ingress points
Solution Approach 1:
The patent integrates multiple shielding functions into a single shield component that can be assembled as one piece, reducing the total number of seams and EMI ingress points while maintaining ease of assembly through standardized mounting interfaces with the housing and fan assemblies.
3Ease of manufacture
If discrete cans are used, then manufacturing of individual parts is easier, but thermal energy dissipation efficiency decreases due to air leaks at seams
Solution Approach 1:
The patent creates a unified shield structure that eliminates air leaks at seams between discrete cans, improving thermal energy dissipation efficiency by containing the airflow path. The integrated design maintains manufacturability through standard fabrication processes for metal shields and simplified assembly procedures.
4Object-generated harmful factors
If a single-piece shield is used, then thermal dissipation and EMI blocking are improved, but manufacturing complexity and assembly difficulty increase
Solution Approach 1:
The patent successfully merges multiple shielding functions into a single piece that can be manufactured using standard processes. The design incorporates features like mounting tabs, positioning protrusions, and integrated airflow channels that are built into the shield during fabrication, eliminating the need for complex post-assembly operations while maintaining effective thermal and EMI shielding.
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 increases thermal energy dissipation and reduces EMI, improving component performance and manufacturing efficiency by minimizing air leaks and EMI ingress points, while also simplifying assembly and reducing costs.
Implementation Method 1
shields described herein are made from metal and when covering components that generate electromagnetic energy, the shields can block the electromagnetic energy from interfering with other components of the electronic device
Implementation Method 2
Shields described herein are sealed with fan assemblies, and form a pressurized enclosure that directs air from the fan assemblies, thereby enhancing thermal energy dissipation in an electronic device
Implementation Method 3
the shield directs airflow from the first fan assembly and the second fan assembly through the grill
Data Source
AI summary
An electronic device is disclosed. The electronic device includes a shield that provides thermal and electromagnetic interference (“EMI”) shielding benefits. The shield is secured with fan assemblies by airtight seals to prevent air leakage and promote a pressured volume when the fan assemblies are running. Further, the shield can direct airflow from the fan assemblies to one or more thermally conductive components, where the airflow can convectively cool the thermally conductive components and exit the electronic device. The shield is made from a metal, and when the shield covers a circuit board, the shield protects an EMI barrier for integrated circuits located on the circuit board. Moreover, the shield can provide a single-piece, monolithic body that provides advantages over multiple shields, such as eliminating gaps in the shield for air leakage and EMI intrusion, increasing air circulation efficiency, and decreasing costs.