Data Reader Back Edge Surface Shaping for Magnetic Stability
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Solution Overview
Problem
The miniaturization of data sensing components in data storage devices leads to degraded magnetic stability due to reduced magnetic layer volumes and increased stray magnetic fields, making it challenging to maintain reliable data sensing performance on a nanometer scale.
Innovation Solution
A magnetically responsive lamination with varying stripe heights and a back edge feature that allows precise shaping of the back edge surface, enabling increased processing time and reduced lamination width, which stabilizes magnetic operation and maintains data sensing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If data sensing components are miniaturized to increase storage density, then storage capacity increases, but magnetic stability degrades due to reduced magnetic layer volumes and increased stray magnetic fields
Solution Approach 1:
The patent applies local quality by creating non-uniform stripe heights in different portions of the magnetically responsive lamination. Specifically, the first portion has a first stripe height from the air bearing surface while the second portion has a second stripe height that differs from the first, allowing different regions to have optimized magnetic properties for stability versus sensing performance
Solution Approach 2:
The patent employs asymmetry by shaping the back edge surface at a predetermined angle relative to the air bearing surface through a back edge feature. This asymmetric geometry creates shape anisotropy that stabilizes magnetic operation, and the varying stripe heights across different portions further emphasize the asymmetric design approach
2Quantity of substance
If lamination width is reduced to increase density, then storage capacity increases, but manufacturing precision becomes more difficult to achieve on a nanometer scale
Solution Approach 1:
The patent applies preliminary action by forming the back edge feature with the predetermined angled back edge surface before final lamination processing. This pre-formed feature serves as a template or guide that enables subsequent precise shaping of the lamination back edge surface, effectively increasing processing time and precision for narrow laminations
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 provides enhanced magnetic stability and data sensing performance by utilizing shape anisotropy and tuned material selection, while allowing for precise fabrication on a nanometer scale, reducing the impact of stray magnetic fields and thermal instability.
Implementation Method 1
The first portion is constructed to have a back edge surface shaped at a predetermined angle relative to the ABS by a back edge feature
Implementation Method 2
a data reader that is capable of sensing data from a rotatable medium
Data Source
AI summary
A data reader can be configured with at least a magnetically responsive lamination that has a first portion with a first stripe height from an air bearing surface (ABS) and a second portion with a different second stripe height from the ABS. The first portion can be constructed to have a back edge surface shaped at a predetermined angle relative to the ABS by a back edge feature.