Magnetic tape and maufacturing method thereof, and servo writer and servo write method
First Claim
1. A magnetic tape comprising:
- a plurality of servo bands; and
servo signals for performing tracking-control of a magnetic head, wherein said servo signals are recorded on said servo bands, wherein a DC magnetization region magnetized in one direction by direct current is arranged along longitudinal directions of said magnetic tape on each of said servo bands, wherein each of said servo signals is magnetized in a reverse direction for said one direction of a DC magnetization and is recorded within said DC magnetization region, and wherein any of a relative ratio and relative difference of DC magnetization intensity in the DC magnetization region and recording magnetization intensity of each of said servo signals differs for each of said servo bands.
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Accused Products
Abstract
A magnetic tape of the present invention comprises a plurality of servo bands and servo signals for performing tracking-control of a magnetic head, wherein the servo signals are recorded on the servo bands, wherein a DC magnetization region magnetized in one direction by direct current is arranged along longitudinal directions of the magnetic tape on the servo bands, wherein each of the servo signals is magnetized in a reverse direction for the one direction of a DC magnetization and is recorded within the DC magnetization region, and wherein any of a relative ratio and relative difference of DC magnetization intensity in the DC magnetization region and recording magnetization intensity of each of the servo signals differs for each of the servo bands.
106 Citations
20 Claims
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1. A magnetic tape comprising:
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a plurality of servo bands; and
servo signals for performing tracking-control of a magnetic head, wherein said servo signals are recorded on said servo bands, wherein a DC magnetization region magnetized in one direction by direct current is arranged along longitudinal directions of said magnetic tape on each of said servo bands, wherein each of said servo signals is magnetized in a reverse direction for said one direction of a DC magnetization and is recorded within said DC magnetization region, and wherein any of a relative ratio and relative difference of DC magnetization intensity in the DC magnetization region and recording magnetization intensity of each of said servo signals differs for each of said servo bands. - View Dependent Claims (8)
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2. A manufacturing method of a magnetic tape where servo signals for performing tracking-control of a magnetic head are recorded on a plurality of servo bands, the method comprising the steps of:
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magnetizing said servo bands in one direction along longitudinal directions of said magnetic tape by direct current;
forming a DC magnetization region within each of said servo bands; and
designing so that any of a relative ratio and relative difference of DC magnetization intensity in the DC magnetization region and recording magnetization intensity of each of said servo signals differs for each of said servo bands, when magnetizing said servo signals in a reverse direction for said one direction of a DC magnetization and recording each of said servo signals within said DC magnetization region. - View Dependent Claims (5, 9, 12, 15, 18, 20)
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3. A servo writer that writes servo signals for performing tracking-control of a magnetic head on a plurality of servo bands of a magnetic tape, the writer comprising:
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a DC delete head for discontinuously magnetizing each of said servo bands in one direction along longitudinal directions of said magnetic tape by direct current and forming a DC magnetization region at a predetermined distance within each of said servo bands; and
a servo write head for adding a recording current pulse of a single polarity within said DC magnetization region, magnetizing said servo signals in a reverse direction for said one direction of a DC magnetization, and writing said servo signals so that any of a relative ratio and relative difference of DC magnetization intensity in the DC magnetization region and recording magnetization intensity of each of said servo signals differs for each of said servo bands. - View Dependent Claims (6, 10, 13, 16, 19)
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4. A servo write method for supplying a recording current to a servo write head and writing servo signals on servo bands of a magnetic tape, the method comprising the steps of:
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magnetizing said servo bands in one-direction along longitudinal directions of said magnetic tape;
forming a DC magnetization region within each of said servo bands; and
designing so that any of a relative ratio and relative difference of DC magnetization intensity in the DC magnetization region and recording magnetization intensity of each of said servo signals differs for each of said servo bands, when adding a recording current pulse of a single polarity to said servo write head and recording each of said servo signals magnetized in a reverse direction for said one direction of a DC magnetization within said DC magnetization region. - View Dependent Claims (7, 11, 14, 17)
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Specification