Magnetoresistive Shield Stabilizing Feature for Magnetic Stability
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Solution Overview
Problem
Smaller magnetic shields in data storage devices experience magnetic instability due to reduced capability in blocking unwanted magnetic flux, affecting data storage capacity and accuracy.
Innovation Solution
A magnetoresistive (MR) reader is adjacent to a shield with a stabilizing feature that extends a second distance less than the first distance from the air bearing surface, providing enhanced magnetic flux blocking and noise cancellation through a combination of active and passive shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the magnetic shield size is reduced to increase data storage capacity, then the data storage capacity is improved, but the magnetic stability deteriorates due to reduced capability in blocking unwanted magnetic flux
Solution Approach 1:
The magnetic shield is segmented into two distinct parts: a first shield portion extending a first distance from the air bearing surface, and a second shield portion extending a second distance (less than the first distance) from the air bearing surface. This segmentation allows each portion to perform specialized functions - the first portion provides primary shielding while the second portion provides stabilization, resolving the contradiction by maintaining magnetic stability even as overall shield size is reduced.
Solution Approach 2:
Different regions of the shield are given different properties and functions. The first shield portion is optimized for flux blocking at a greater distance, while the second shield portion is optimized for magnetic domain stabilization at a shorter distance. This local differentiation allows the shield to maintain effectiveness despite reduced overall dimensions, enabling both high data storage capacity and magnetic stability.
2Device complexity
If the magnetic shield size is reduced, then the device complexity is reduced, but the shielding capability deteriorates due to reduced capability in blocking unwanted magnetic flux
Solution Approach 1:
The shield is divided into two functional segments with different extension distances from the air bearing surface. This segmentation creates a hierarchical shielding approach where the first portion handles distant flux and the second portion handles near-field stabilization, maintaining comprehensive shielding capability while using a relatively simple two-part structure.
Solution Approach 2:
The shield design utilizes parameter changes in the extension distance of different shield portions from the air bearing surface. By varying the distance parameter (first distance versus second distance), the shield optimizes its shielding capability across different spatial zones, effectively blocking unwanted magnetic flux without requiring excessive structural 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 solution stabilizes magnetic domains, reduces magnetic instability, and improves data storage capacity by effectively shielding unwanted magnetic flux, enhancing the accuracy and efficiency of data storage operations.
Implementation Method 1
The stabilizing feature may be contactingly adjacent the magnetoresistive reader and may extend from the air bearing surface a second distance that is less than the first distance
Implementation Method 2
magnetoresistive (MR) reader is adjacent to at least one shield
Data Source
AI summary
A magnetoresistive (MR) reader is adjacent to at least one shield that extends from an air bearing surface (ABS) a first distance. The shield has a stabilizing feature that is contactingly adjacent the MR reader and extends from the ABS a second distance that is less than the first distance.