Probe Head Trailing Shield for Magnetic Tape Recording
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Solution Overview
Problem
Conventional magnetic tape recording systems using ring heads face challenges in achieving narrow track widths due to fringing fields, which limit recording density and lead to track edge distortion during shingling operations.
Innovation Solution
The use of a probe head with a trailing shield for perpendicular recording on magnetic tape, where the trailing shield is positioned in close proximity to the probe tip to confine magnetic fields and inhibit track edge distortion, enables the writing of narrow shingled tracks with improved recording density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a ring head is used for magnetic recording, then the system can perform conventional recording operations, but track edge distortion occurs during shingling and track widths cannot be narrowed sufficiently
Solution Approach 1:
The head structure is segmented into distinct functional components: a probe tip for writing and a trailing shield for confinement. This segmentation allows each component to perform its specific function optimally, with the probe tip creating tracks and the trailing shield preventing edge distortion during shingling operations.
Solution Approach 2:
The trailing shield acts as an intermediary element between the probe tip and the tape medium. It mediates the magnetic field interactions by confining the fields laterally, preventing the fringing fields from causing track edge distortion while allowing the primary writing function to proceed.
2Quantity of substance
If conventional ring heads are used, then recording operations can be performed, but recording density is limited due to inability to write narrow tracks
Solution Approach 1:
The invention changes the geometric parameters of the head structure, transitioning from a conventional ring head geometry to a probe tip with trailing shield geometry. This parameter change enables the writing of narrower tracks (500 nm or less) by confining the magnetic fields laterally, thereby increasing recording density.
3Productivity
If shingling operations are performed with conventional heads, then track overlap is achieved, but track edge distortion prevents further narrowing
Solution Approach 1:
The trailing shield converts the potentially harmful fringing fields into a beneficial confinement mechanism. By positioning the shield adjacent to the probe tip, the fringing fields are channeled and confined between the probe tip and shield, transforming what would be source of distortion into a field confinement mechanism that enables precise shingling.
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 allows for the writing and shingling of tracks with widths of 500 nm or less, significantly reducing track edge distortion and enhancing recording density compared to conventional ring head systems.
Implementation Method 1
The magnetic recording transducer generates a magnetic field, which encodes the data into the magnetic media
Implementation Method 2
The trailing shield acts to confine the magnetic fields to the region of the probe tip, providing well defined bit edges
Implementation Method 3
Particles such as BaFe may be used with magnetization oriented in the direction perpendicular to the surface of the tape
Data Source
AI summary
Provided are apparatus, systems and methods relating to magnetic recording on tape. A tape storage apparatus may be used that includes a probe head for writing data by perpendicular recording on a magnetic tape including a magnetic particle layer and a soft magnetic underlayer. The probe head includes a probe tip and a trailing shield adjacent to the probe tip.