Seed trilayer magnetic element for high density storage
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Solution Overview
Problem
Conventional data storage devices face challenges in reducing physical size while maintaining operational speed and accuracy, as magnetic components experience degraded performance when scaled down, and increased data bit density leads to reduced magnetic signature and noise from adjacent bits.
Innovation Solution
A magnetic element with a seed trilayer configuration, where a magnetic layer is positioned between two non-magnetic layers, allowing for tuning of thickness and material to optimize the magnetic stack for reduced form factor and increased data bit density, decoupling the pinning layer from the magnetic layer to enhance magnetic stability and data bit resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If magnetic components are scaled down to reduce physical size, then device form factor is reduced, but magnetic component performance degrades
Solution Approach 1:
The patent segments the magnetic component into distinct functional layers including a seed layer, magnetic layer, and cap layer. This segmentation allows each layer to be optimized independently for its specific function while maintaining overall component performance in reduced form factor devices
Solution Approach 2:
The patent applies local quality by using different materials and thicknesses for different layers within the magnetic component. The seed layer uses specific materials with particular magnetic properties, while the cap layer uses different materials, allowing each region to have locally optimized properties that maintain performance at reduced scale
2Quantity of substance
If data bit density is increased, then storage capacity is improved, but magnetic signature is reduced and noise from adjacent bits increases
Solution Approach 1:
The patent uses local quality by implementing a seed layer with specific magnetic anisotropy properties that enhance the magnetic signature of each data bit. This localized optimization of magnetic properties at the bit level improves detectability even as bits are packed more densely
Solution Approach 2:
The patent changes magnetic parameters by adjusting the thickness and material composition of the seed layer and magnetic layer to optimize magnetic anisotropy and coercivity. These parameter changes enhance the magnetic signature strength, allowing for higher data bit density while maintaining detection precision
3Volume of moving object
If seed layer thickness is reduced to enable reduced form factor, then device size is reduced, but magnetic stability deteriorates
Solution Approach 1:
The patent uses composite materials by combining the seed layer with specific cap layer materials to create a composite structure. This composite approach allows the thin seed layer to maintain magnetic stability through the synergistic interaction with the cap layer materials, even at reduced thickness for compact form factor
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 seed trilayer configuration enables reduced shield-to-shield spacing, increased magnetic stability, and improved data bit resolution, enhancing the magnetoresistive ratio and resistance area, thus supporting high data bit density storage devices with maintained operational speed and accuracy.
Implementation Method 1
decoupling the pinning layer from the magnetic layer to enhance magnetic stability
Implementation Method 2
enhancing the magnetoresistive ratio and resistance area, thus supporting high data bit density storage devices
Data Source
AI summary
A magnetic element may generally be configured at least with a magnetic stack contacting a leading shield with a seed trilayer. The seed trilayer may have a magnetic layer formed of a metal material and disposed between first and second non-magnetic layers while at least one of the non-magnetic layers constructed of the metal material.