Write Pole Wrap-Around Shield Gap Lamination
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Solution Overview
Problem
As data storage components scale down to increase data densities, they face challenges with magnetic volatility due to close proximity of magnetic materials, leading to inadvertent shunting and magnetic saturation, which jeopardize magnetic strength and stability.
Innovation Solution
A data writer configuration with a write pole laterally disposed between side shields and vertically between a wrap-around shield and a front shield, separated by a lamination of non-magnetic layers, which can be tuned for varying magnetic flux densities to promote magnetic stability and reduce shunting risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If data storage components are scaled down to increase data densities, then data capacity increases, but magnetic volatility increases due to close proximity of magnetic materials
Solution Approach 1:
The gap material is divided into multiple laminations (first gap lamination and second gap lamination) with different magnetic flux densities. The first gap lamination has a lower magnetic flux density than the second gap lamination, creating segmented magnetic shielding zones that prevent unwanted shunting while maintaining write pole performance in scaled-down components
Solution Approach 2:
Different regions of the gap structure are assigned different magnetic properties through the use of laminations with varying magnetic flux densities. The first gap lamination provides a weaker magnetic field region closer to the write pole, while the second gap lamination provides a stronger magnetic field region further away, optimizing both shielding and write performance in the scaled-down structure
2Object-affected harmful factors
If magnetic shield materials are placed in close proximity to increase shielding effectiveness, then magnetic shielding improves, but inadvertent shunting and magnetic saturation occur
Solution Approach 1:
Multiple gap laminations are introduced as intermediary structures between the write pole and the magnetic shield materials. These laminations act as magnetic flux mediators with progressively increasing magnetic flux densities, controlling and directing the magnetic field distribution to prevent direct contact and unwanted shunting between magnetic components
Solution Approach 2:
The gap structure utilizes a composite arrangement of multiple laminations with different magnetic flux density characteristics. This composite structure combines materials or layers with varying magnetic properties to achieve optimized magnetic field distribution, providing both shielding effectiveness and prevention of magnetic saturation in adjacent components
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
This configuration balances precise magnetic shielding with maintaining data writing performance, reducing the risk of unwanted magnetic shunting and saturation, thereby enhancing magnetic stability and data integrity.
Implementation Method 1
close proximity increases the risk of inadvertent shunting and magnetic saturation
Implementation Method 2
The lamination of non-magnetic layers can be tuned to have varying magnetic flux densities to promote magnetic stability
Data Source
AI summary
A data writer can have at least a write pole laterally disposed between first and second side shields and vertically disposed between a wrap-around shield and a front shield. The write pole may be separated from the side shields and the wrap-around shield by a lamination of first and second non-magnetic layers.