Servo Pattern Recording Head Gap Offset Design
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Solution Overview
Problem
Existing servo pattern recording technologies face challenges in identifying data bands, reducing thermal influence, and minimizing crosstalk during servo pattern recording on magnetic tapes.
Innovation Solution
A servo pattern recording head with magnetically separated head cores and gap patterns formed on its surface, where the gap patterns deviate from each other at a predetermined interval, is used to record servo patterns on magnetic tapes. This design includes a pulse signal generator to supply pulse currents for identifying servo patterns and reducing thermal influence and crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple servo patterns are recorded using conventional recording heads, then data band identification is achieved, but thermal influence and crosstalk increase due to heat generation and magnetic field interference
Solution Approach 1:
The recording head is divided into multiple independent head cores (first head core, second head core, etc.) that are magnetically separated. Each head core independently records servo patterns on different servo bands, eliminating magnetic field interference (crosstalk) between adjacent heads while reducing overall heat generation through distributed operation.
Solution Approach 2:
A nonmagnetic layer is introduced between adjacent head cores to provide magnetic isolation. This intermediary layer prevents magnetic flux leakage and crosstalk between neighboring head cores, ensuring that each head operates independently without interfering with adjacent recording operations.
2Ease of manufacture
If gap patterns are aligned in the longitudinal direction, then manufacturing is simplified, but crosstalk occurs between adjacent head cores
Solution Approach 1:
The gap patterns of adjacent head cores are deliberately offset from each other in the longitudinal direction by a predetermined interval. This asymmetric arrangement ensures that the magnetic fields generated by adjacent heads do not overlap and interfere with each other, eliminating crosstalk while maintaining relatively simple manufacturing through standardized offset positioning.
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 proposed solution effectively identifies data bands, reduces thermal influence by minimizing heat generation, and decreases crosstalk by ensuring magnetic fields do not interfere between adjacent head cores, thereby enhancing the recording accuracy and reliability of servo patterns.
Implementation Method 1
a plurality of gap patterns that are formed on a front surface of each of the plurality of head cores and that are used for recording a plurality of servo patterns in a width direction of a magnetic tape by applying a magnetic field to the magnetic tape in response to a pulse current
Implementation Method 2
a plurality of head cores that are magnetically separated from each other
Data Source
AI summary
A servo pattern recording head includes: a plurality of head cores that are magnetically separated from each other; and a plurality of gap patterns that are formed on a front surface of each of the plurality of head cores and that are used for recording a plurality of servo patterns in a width direction of a magnetic tape by applying a magnetic field to the magnetic tape in response to a pulse current, in which the plurality of gap patterns are formed on the front surface along a direction corresponding to the width direction, and the plurality of gap patterns deviate from each other at a predetermined interval in a direction corresponding to a longitudinal direction of the magnetic tape between the gap patterns adjacent to each other along the direction corresponding to the width direction.