Vented Chassis Tabs for EMI Shielding and PCB Cooling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Automotive infotainment systems face challenges in managing electromagnetic interference (EMI) and heat dissipation without increasing the packaging size of electronic devices.
Innovation Solution
A chassis with bent tabs forming vent openings and a circuit board contact points, made from electrically conductive and magnetically permeable materials, enhances EMI shielding and heat dissipation through mini-fins, vents, and convective cooling without enlarging the enclosure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a chassis is formed from metal to provide EMI shielding, then EMI protection is improved, but heat dissipation capability deteriorates
Solution Approach 1:
The chassis is segmented into multiple sections with different material properties - metal sections for EMI shielding and thermally conductive sections for heat dissipation. This allows the chassis to simultaneously provide both EMI protection and thermal management by dividing the structure into functional zones.
Solution Approach 2:
The chassis utilizes composite material construction combining metal and thermally conductive materials in a single structure. This composite approach enables the chassis to exhibit both electromagnetic shielding properties and enhanced heat dissipation capabilities, resolving the contradiction between EMI protection and thermal management.
2Temperature
If heat dissipation features such as perforated holes and heat spreaders are added to the chassis, then thermal management is improved, but packaging size increases
Solution Approach 1:
Heat dissipation features are merged with the chassis structure itself rather than being separate components. The thermally conductive sections are integrated directly into the chassis walls, allowing heat dissipation functionality to be achieved without adding external heat sinks or separate ventilation systems that would increase packaging volume.
Solution Approach 2:
The chassis structure serves multiple functions simultaneously - it provides EMI shielding, thermal management, and structural support. The thermally conductive sections are positioned to serve both as structural elements and as heat dissipation pathways, eliminating the need for separate dedicated heat dissipation components.
3Productivity
If dense integrated circuits are used in automotive infotainment systems, then system performance is improved, but heat generation and EMI susceptibility increase
Solution Approach 1:
The chassis acts as an intermediary between the dense integrated circuits and the external environment. It provides a structured approach to managing the harmful effects by directing heat flow through thermally conductive sections and blocking EMI through metal sections, thereby protecting the high-performance circuits while managing their byproducts.
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 provides robust EMI shielding and efficient thermal management for high-performance infotainment systems by increasing heat sinking capacity and airflow without increasing the package size.
Implementation Method 1
A chassis with bent tabs forming vent openings and a circuit board contact points, made from electrically conductive and magnetically permeable materials, enhances EMI shielding
Implementation Method 2
The chassis with bent tabs forming vent openings... enhances EMI shielding and heat dissipation through mini-fins, vents, and convective cooling
Implementation Method 3
The solution provides robust EMI shielding and efficient thermal management for high-performance infotainment systems by increasing heat sinking capacity
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Methods and systems for an electronic package for a vehicle are provided. In one example, the electronic package includes a chassis having a plurality of bent tabs forming a plurality of respective vent openings in the chassis, and a circuit board coupled to the chassis, wherein the bent tabs directly contact the circuit board.