Package Substrate Magnetic Shielding for Memory Reliability
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Solution Overview
Problem
Magnetic memories are susceptible to data loss due to external magnetic fields, requiring effective magnetic field shielding to enhance reliability.
Innovation Solution
A package substrate with magnetic field shielding units made of ferromagnetic materials like iron, cobalt, and nickel, strategically disposed to create a shielding region equal to or larger than the mounting area, overlapping to ensure comprehensive protection against external magnetic fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic field shielding units are added to the package substrate, then reliability of magnetic memory is improved by blocking external magnetic fields, but device complexity increases due to additional structural components
Solution Approach 1:
The magnetic field shielding units are integrated into the package substrate structure, merging the shielding function with the existing substrate rather than adding separate components. The shielding units are formed as part of the substrate layers, combining structural support and magnetic field blocking functions in a single integrated component.
Solution Approach 2:
The package substrate serves multiple functions: it provides mechanical support for mounting semiconductor devices, establishes electrical connections through circuit patterns and vias, and blocks external magnetic fields through the integrated shielding units. This multi-functionality reduces the need for additional separate components.
2Reliability
If the magnetic field shielding region is made larger than the mounting region, then shielding effectiveness is improved, but area of the package substrate increases
Solution Approach 1:
The magnetic field shielding units are strategically positioned in specific regions where magnetic field blocking is most needed, such as around the mounting region and along edges where external fields may penetrate. The shielding is concentrated in critical areas rather than uniformly distributed across the entire substrate.
Solution Approach 2:
The magnetic field shielding region extends beyond the mounting region area in certain directions to provide adequate shielding coverage, accepting some increase in substrate area to ensure complete protection of the magnetic memory devices from external magnetic fields.
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 blocks external magnetic fields, preventing unintended data changes and enhancing the reliability of magnetic memory devices by creating a comprehensive magnetic field shielding region within the package substrate.
Implementation Method 1
a plurality of magnetic field shielding units including a ferromagnetic material and provided within the body unit
Data Source
AI summary
There is provided a package substrate including: a body unit including a plurality of base substrates and having a mounting region allowing at least one semiconductor device to be mounted thereon; and a plurality of magnetic field shielding units including a ferromagnetic material and provided within the body unit, wherein the plurality of magnetic field shielding units may be respectively disposed on the plurality of different base substrates such that a magnetic field shielding region defined by the plurality of magnetic field shielding units corresponds to the mounting region.