MAGNETIC HEAD AND METHOD OF MANUFACTURING THE SAME, LINEAR TAPE DRIVE APPARATUS, AND MAGNETIC RECORDING AND REPRODUCTION METHOD
First Claim
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1. A magnetic head employed in a linear tape drive, whereinthe linear tape drive is a sliding-contact linear tape drive in which a magnetic head comes in sliding contact with a magnetic tape during recording and/or reproduction of a magnetic signal,the magnetic head comprises multiple indentations that are observed in a surface topographic image viewed by a scanning probe microscope on a surface of sliding contact with a magnetic tape, the surface being referred to as “
- sliding contact surface”
, hereinafter, andthe multiple indentations satisfy (1) to (4) below;
(1) an average area of the indentations in the sliding contact surface ranges from about 0.2 μ
m2 to about 1.0 μ
m2;
(2) a standard deviation of an area of the indentations ranges from about 0.5 μ
m2 to about 2.0 μ
m2;
(3) an area ratio of the indentations in the sliding contact surface ranges from about 20 percent to about 50 percent; and
(4) an average depth of the indentations is equal to or greater than about 15 nm.
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Abstract
An aspect of the present invention relates to a magnetic head employed in a linear tape drive in the form of a sliding-contact linear tape drive. The magnetic head comprises multiple indentations that are observed in a surface topographic image viewed by a scanning probe microscope on a surface (sliding contact surface) of sliding contact with a magnetic tape, and the multiple indentations satisfy (1) to (4) below:
- (1) an average area of the indentations in the sliding contact surface ranges from about 0.2 μm2 to about 1.0 μm2;
- (2) a standard deviation of an area of the indentations ranges from about 0.5 μm2 to about 2.0 μm2;
- (3) an area ratio of the indentations in the sliding contact surface ranges from about 20 percent to about 50 percent; and
- (4) an average depth of the indentations is equal to or greater than about 15 nm.
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Citations
9 Claims
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1. A magnetic head employed in a linear tape drive, wherein
the linear tape drive is a sliding-contact linear tape drive in which a magnetic head comes in sliding contact with a magnetic tape during recording and/or reproduction of a magnetic signal, the magnetic head comprises multiple indentations that are observed in a surface topographic image viewed by a scanning probe microscope on a surface of sliding contact with a magnetic tape, the surface being referred to as “ - sliding contact surface”
, hereinafter, andthe multiple indentations satisfy (1) to (4) below; (1) an average area of the indentations in the sliding contact surface ranges from about 0.2 μ
m2 to about 1.0 μ
m2;(2) a standard deviation of an area of the indentations ranges from about 0.5 μ
m2 to about 2.0 μ
m2;(3) an area ratio of the indentations in the sliding contact surface ranges from about 20 percent to about 50 percent; and (4) an average depth of the indentations is equal to or greater than about 15 nm. - View Dependent Claims (2, 9)
- sliding contact surface”
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3. A linear tape drive apparatus comprising a magnetic tape and a magnetic head, wherein
the linear tape drive apparatus is a sliding-contact linear tape drive apparatus in which a magnetic head comes in sliding contact with a magnetic tape during recording and/or reproduction of a magnetic signal, the magnetic head comprises multiple indentations that are observed in a surface topographic image viewed by a scanning probe microscope on a surface of sliding contact with a magnetic tape, the surface being referred to as “ - sliding contact surface”
, hereinafter, andthe multiple indentations satisfy (1) to (4) below; (1) an average area of the indentations in the sliding contact surface ranges from about 0.2 μ
m2 to about 1.0 μ
m2;(2) a standard deviation of an area of the indentations ranges from about 0.5 μ
m2 to about 2.0 μ
m2;(3) an area ratio of the indentations in the sliding contact surface ranges from about 20 percent to about 50 percent; and (4) an average depth of the indentations is equal to or greater than about 15 nm. - View Dependent Claims (4, 5)
- sliding contact surface”
-
6. A magnetic recording and reproduction method, wherein
a magnetic signal is linearly recorded and/or reproduced on a magnetic tape while a magnetic head comes in sliding contact with the magnetic tape, the magnetic head comprises multiple indentations that are observed in a surface topographic image viewed by a scanning probe microscope on a surface of sliding contact with a magnetic tape, the surface being referred to as “ - sliding contact surface”
, hereinafter, andthe multiple indentations satisfy (1) to (4) below; (1) an average area of the indentations in the sliding contact surface ranges from about 0.2 μ
m2 to about 1.0 μ
m2;(2) a standard deviation of an area of the indentations ranges from about 0.5 μ
m2 to about 2.0 μ
m2;(3) an area ratio of the indentations in the sliding contact surface ranges from about 20 percent to about 50 percent; and (4) an average depth of the indentations is equal to or greater than about 15 nm. - View Dependent Claims (7, 8)
- sliding contact surface”
Specification
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Current AssigneeFujifilm Corporation (Fujifilm Holdings Corporation)
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Original AssigneeFujifilm Corporation (Fujifilm Holdings Corporation)
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InventorsKamisawa, Shiho, KOMORI, Yasushi
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Application NumberUS12/566,128Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current360/110CPC Class CodesG11B 5/00821 using stationary headsG11B 5/00852 using stationary headsG11B 5/102 Manufacture of housingG11B 5/1871 Shaping or contouring of th...G11B 5/3106 where the integrated or ass...G11B 5/3173 Batch fabrication, i.e. pro...Y10T 29/49048 Machining magnetic material...
