Magnetic Element Current Constriction Feature Data Sensing
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Solution Overview
Problem
In high data bit density storage devices, magnetic instability and noise due to strong magnetic flux and close component proximity lead to erratic behavior and poor data sensing, hindering accurate and fast data access.
Innovation Solution
A magnetic element with a magnetic stack contacting a magnetic shield featuring a current constriction design that transitions electrical current from horizontal to vertical orientation proximal the air bearing surface, restricting current flow to noisy regions and enhancing isolation, allowing focused current delivery to optimized data sensing areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If components are placed in close proximity to increase data bit density, then storage capacity is improved, but magnetic instability and noise increase leading to erratic behavior
Solution Approach 1:
The magnetic shield is segmented into multiple layers with different orientations (first shield layer with first orientation, second shield layer with second orientation). This segmentation allows each layer to address specific magnetic flux components independently, reducing overall magnetic instability and noise while maintaining close component proximity for high data bit density.
Solution Approach 2:
Different regions of the magnetic shield are designed with different properties - the first shield layer has a first orientation optimized for blocking magnetic flux in one direction, while the second shield layer has a second orientation for another direction. This local quality variation enables targeted magnetic flux management at different locations and orientations within the shield structure.
2Measurement precision
If strong magnetic flux is used to increase data sensing capability, then data signal strength is improved, but magnetic noise and erratic behavior increase
Solution Approach 1:
The patent converts the potentially harmful strong magnetic flux that causes noise into a beneficial signal by using layered shields with different orientations. The first shield layer blocks magnetic flux in one orientation while the second shield layer blocks flux in another orientation, allowing the strong magnetic flux to be managed constructively rather than causing erratic behavior, thus improving data sensing capability while reducing noise.
3Reliability
If current flows horizontally through the magnetic stack, then electrical connectivity is maintained, but magnetic noise and instability are exacerbated
Solution Approach 1:
The patent transitions the current flow from a horizontal orientation to a vertical orientation by using the layered shield structure. The first and second shield layers with different orientations guide the electrical current vertically through the magnetic stack rather than horizontally, which reduces magnetic noise and instability while maintaining electrical connectivity. This dimensional change in current flow path resolves the contradiction between connectivity and noise reduction.
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 mitigates magnetic instability, enhances data signal amplitude, and improves responsiveness by ensuring electrical current flows through magnetically optimized regions, leading to more stable and accurate data access in reduced form factor storage devices.
Implementation Method 1
current constriction feature configured to transition electrical current from a horizontal orientation to a vertical orientation proximal an air bearing surface (ABS)
Data Source
AI summary
A magnetic element may generally be directed to data bit sensing in various data storage environments. An example magnetic element may be configured with at least a magnetic stack contacting a magnetic shield having a current constriction feature configured to transition current from a horizontal orientation to a vertical orientation proximal an air bearing surface (ABS).