Chamfered Magnetic Write Pole Tip for High-Density Storage
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Solution Overview
Problem
Magnetic storage devices face limitations in write field strength and gradient when recording smaller data bits, leading to reduced data capacity and efficiency in high-density data storage.
Innovation Solution
A magnetically conductive write pole with a chamfered corner and beveled surface is designed to limit magnetic saturation, enhancing write field gradient and bit writeability by controlling magnetic flux delivery to the data storage medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional write pole is used, then the structure is simple, but magnetic saturation occurs at the pole tip corners leading to reduced write field gradient
Solution Approach 1:
The patent applies local quality by chamfering only the corner regions of the write pole tip while leaving the central region intact. This localized modification creates different surface geometries in different regions: the chamfered corners have reduced magnetic saturation compared to conventional sharp corners, while the central region maintains its original flux concentration properties. This resolves the contradiction by improving write field gradient locally without requiring complete structural redesign.
Solution Approach 2:
The patent introduces asymmetry by applying chamfers at specific corner angles (e.g., 45 degrees) rather than maintaining symmetric sharp corners throughout. The chamfered corners create asymmetric flux distribution that prevents magnetic saturation buildup, improving write field gradient. This asymmetric modification is applied selectively to corners while preserving overall pole symmetry, balancing structural simplicity with performance improvement.
2Quantity of substance
If the data bit size is reduced to increase density, then storage capacity increases, but write field strength and gradient become insufficient
Solution Approach 1:
The patent changes the geometric parameters of the write pole tip by introducing chamfers with specific dimensions (e.g., chamfer width ranging from 0.1 to 1.0 micrometers). This parameter modification alters the magnetic flux distribution at the pole corners, reducing saturation effects. The chamfered geometry creates a more gradual flux transition that maintains sufficient write field gradient even when recording smaller, higher-density data bits, thus resolving the contradiction between data density and write field precision.
3Manufacturing precision
If magnetic saturation is not limited, then flux concentration is high, but write field uniformity and gradient control deteriorate
Solution Approach 1:
The patent converts the harmful effect of magnetic saturation at pole corners into a beneficial feature by chamfering the corners. The chamfered geometry intentionally creates a controlled flux distribution pattern where the corner regions, which would normally saturate and create field non-uniformities, instead provide gradual flux transitions. This transforms the previously harmful saturation effect into a mechanism that improves write field uniformity and gradient control, resolving the contradiction between flux concentration and field control precision.
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 configuration improves data recording efficiency by maintaining write field strength and gradient, enabling higher linear data bit densities and precise magnetic programming in high-density data storage.
Implementation Method 1
chamfered to limit magnetic saturation of the conductive pole tip
Implementation Method 2
controlling magnetic flux delivery to the data storage medium
Data Source
AI summary
A write pole can have a magnetically conductive pole tip has at least one corner. The at least one corner may be chamfered to limit magnetic saturation of the conductive pole tip. The conductive pole tip can have one or more beveled surface that has a chamfered corner which extends a predetermined distance along an edge of the write pole.