Magnetic Shield Shell Structure for IC Protection From External Fields
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Solution Overview
Problem
Current magnetic shields for integrated circuit chips, such as MRAM chips, are ineffective in shielding against external magnetic fields, leading to potential malfunctioning due to low shielding efficiency.
Innovation Solution
A magnetic shield structure comprising a shell made of magnetic material connected to a base plate, forming a chamber around a chip mounting region to provide effective shielding against external magnetic fields, with vias and via plugs to enhance magnetic field management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current magnetic shields are used for integrated circuit chips, then the chip is provided with some form of shielding, but the shielding efficiency is low and external magnetic fields can still disturb the chip function
Solution Approach 1:
The magnetic shield is constructed using composite material structure consisting of a magnetic material shell (e.g., permalloy, mu-metal) encapsulating the integrated circuit chip. This composite structure provides high magnetic shielding efficiency by utilizing the high magnetic permeability of the magnetic material to redirect external magnetic field lines around the protected chip, effectively preventing magnetic field disturbance while maintaining chip functionality
Solution Approach 2:
The magnetic shield structure serves multiple functions: it provides magnetic field shielding to protect the chip, acts as a protective enclosure for the chip, and can be integrated with the chip package structure. This multi-functional design achieves effective shielding while avoiding additional complexity
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 proposed shield structure significantly improves magnetic shielding efficiency, ensuring the stability and functionality of semiconductor chips by uniformly shielding against external magnetic fields from various angles.
Implementation Method 1
a shell arranged over the base plate to provide a chamber having a volume within which the chip mounting region is arranged. The shell comprises a magnetic material.
Data Source
Figure 1A~1B
Figure 2A~2B
AI summary
A shield structure for a semiconductor chip comprises a chip mounting region on a base plate and a shell connected to the base plate. The shell is arranged over the base plate to provide a chamber having a volume, and the chip mounting region is arranged within the volume.