Radiation Shield Gap Layout for EMI Control in Dense Electronics
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Solution Overview
Problem
Increasing density of computing elements in electronic devices leads to increased electromagnetic interference (EMI) and radio-frequency interference (RFI), affecting device performance and longevity, and existing shielding solutions are costly or inefficient.
Innovation Solution
A radiation shield with a gap in the shield wall, allowing additional space for components and traces, and using a conductive layer to close the gap and ground the shield, thereby containing radiation and preventing leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the radiation shield wall is made continuous to completely block radiation, then radiation shielding effectiveness is improved, but the available space for components and traces is reduced
Solution Approach 1:
The radiation shield wall is segmented into discrete sections rather than being continuous, creating gaps between segments. These gaps allow space for components and traces while the segmented structure still provides effective radiation shielding through the distributed shield sections.
Solution Approach 2:
The radiation shield gaps are merged with electronic components (such as batteries) that are placed within or adjacent to the gap regions. This combination allows the components to occupy the gap space while the shield structure around them maintains radiation containment.
2Area of stationary object
If the substrate size is increased to provide more space for components and traces, then the available space for components and traces is improved, but the device footprint and size are increased
Solution Approach 1:
Instead of increasing the substrate area in the planar dimensions, the design utilizes the vertical dimension by placing components (such as batteries) in three-dimensional space around and between shield wall segments, effectively using Z-height to accommodate components without increasing board footprint.
3Area of stationary object
If the radiation shield wall is made non-continuous to provide space for components, then the available space for components and traces is improved, but radiation leakage increases
Solution Approach 1:
Different regions of the shield structure have different properties: solid shield walls in regions requiring radiation blocking, and controlled gaps in regions where component access is needed. The shield structure transitions from uniform to non-uniform, with local variations optimized for specific functional requirements.
Solution Approach 2:
Conductive layers and grounding structures serve as intermediaries between the radiation shield gaps and the surrounding environment, managing electromagnetic fields and preventing radiation leakage through the gap regions by providing controlled electrical pathways.
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 increased space for components and traces without increasing substrate size, improving processor performance and reducing EMI/RFI, while maintaining a narrow board width and reducing radiation leaks.
Implementation Method 1
A radiation shield with a gap in the shield wall, allowing additional space for components and traces, and using a conductive layer to close the gap and ground the shield, thereby containing radiation and preventing leaks.
Data Source
AI summary
Particular embodiments described herein provide for an electronic device that includes an electronic component, a support structure that includes a radiation source, a radiation shield on the support structure. The radiation shield includes a wall and the wall is not continuous around the radiation source and includes a radiation shield gap, where the electronic component covers the radiation shield gap to complete the radiation shield wall.