Magnetic Tape Servo Pattern Layout for Uniform Signal Reading
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Solution Overview
Problem
Existing servo patterns on magnetic tapes exhibit non-uniformity, leading to inaccuracies in signal reading, which is not adequately addressed by existing solutions.
Innovation Solution
A magnetic tape design with alternating servo patterns inclined at different angles and aligned end positions, along with a specific distance relationship, to ensure uniform signal reading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If symmetrically disposed servo patterns with equal azimuth angles are used, then manufacturing simplicity is maintained, but servo signal uniformity deteriorates
Solution Approach 1:
The patent applies asymmetry by configuring the first linear magnetization region with a steeper inclined angle than the second linear magnetization region. This asymmetric angular configuration within each servo pattern, combined with the alternating arrangement of first and second servo patterns, creates uniform servo signals by compensating for head inclination effects while maintaining manufacturing feasibility through a systematic pattern design.
2Measurement precision
If alternating first and second servo patterns with different inclined angles are used, then servo signal uniformity is improved, but pattern complexity increases
Solution Approach 1:
The patent segments the servo pattern into distinct first servo patterns and second servo patterns that alternate along the longitudinal direction. Each segment (servo pattern) contains asymmetric linear magnetization regions with different inclined angles, and this segmentation allows the complex asymmetric configuration to be systematically repeated, making the overall pattern manageable and manufacturable despite its complexity.
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 design enhances the accuracy of servo signal reading, reducing non-uniformity and improving the overall reading performance of magnetic tapes.
Implementation Method 1
records a plurality of servo patterns in a band-shaped region, which is formed in a band shape on a front surface of a magnetic tape along a longitudinal direction of the magnetic tape, along the longitudinal direction by applying a magnetic field to the band-shaped region from the gap pattern
Data Source
AI summary
A first servo pattern has a first position and a second position which intersect an imaginary line. A second servo pattern has a third position intersecting the imaginary line. The imaginary line is set at a position at which a relationship in which a distance between the first position and the second position is half of a distance between the first position and the third position is established between the first servo pattern and the second servo pattern adjacent to each other in a longitudinal direction. A width of a servo band is set to a length in which a distance from the imaginary line to one end of the servo band in a width direction and a distance from the imaginary line to the other end of the servo band in the width direction are equal.