Magnetic Writer Multiple Gaps Uniform Field
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Solution Overview
Problem
Magnetic storage systems face challenges in achieving uniform magnetic field intensity across multiple gaps in magnetic write heads, leading to variations in recorded patterns and reduced data storage density.
Innovation Solution
The implementation of a magnetic device with a source of flux and a magnetic yoke having multiple gaps, where the coil turns are placed non-uniformly or with varying geometries to equalize magnetic field intensities across the gaps, and the use of low reluctance paths to shunt flux and adjust field strengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple gaps are used in magnetic write head to increase track density, then data storage density is improved, but magnetic field uniformity across gaps deteriorates
Solution Approach 1:
The patent applies local quality by varying the coil turn placement density across different gaps. Specifically, gaps with weaker magnetic fields receive higher coil turn density, while gaps with stronger fields receive lower coil turn density. This non-uniform distribution compensates for the inherent field variations across multiple gaps, achieving uniform magnetic field strength at each gap location.
Solution Approach 2:
The patent changes the parameter of coil turn placement from uniform to non-uniform distribution. By adjusting the density of coil turns at different positions along the magnetic yoke, the system optimizes the magnetic field strength at each gap. This parameter modification allows multiple gaps to maintain consistent field intensities despite their different positions in the magnetic circuit.
2Manufacturing precision
If non-uniform coil turn placement is used to equalize magnetic fields, then magnetic field uniformity is improved, but device complexity increases
Solution Approach 1:
The patent modifies the placement parameter of coil turns along the magnetic yoke to achieve uniform magnetic fields across multiple gaps. By varying the linear density of coil turns as a function of position, the system equalizes field strengths without requiring fundamentally different coil structures or additional 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 approach minimizes gap-to-gap field variations, enhancing the quality of recorded patterns and increasing data storage density by ensuring consistent magnetic field intensities across the gaps.
Implementation Method 1
The magnetic recording transducer then generates a magnetic field, which encodes the data into the magnetic media
Implementation Method 2
The implementation of a magnetic device with a source of flux and a magnetic yoke having multiple gaps, where the coil turns are placed non-uniformly or with varying geometries to equalize magnetic field intensities across the gaps, and the use of low reluctance paths to shunt flux and adjust field strengths
Data Source
AI summary
A magnetic device according to one embodiment includes a source of flux and a magnetic yoke coupled to the source of flux. The source of flux includes a thin film coil having multiple turns. The magnetic yoke has a pole with two or more gaps, wherein the coil turns have a non-uniform placement in the magnetic yoke for creating a higher magnetic field at one of the gaps than another of the gaps during writing. A magnetic device according to another embodiment includes a source of flux. A geometry of the magnetic pole near or at one of the gaps is different than a geometry of the magnetic pole near or at another of the gaps to help equalize fields formed at the gaps when the source of flux is generating flux.