Magnetic head driving arm, its manufacturing method and surface treatment method

A technology for driving arms and magnetic heads, which is applied to driving/moving recording heads, the structure of arm parts, and the configuration/installation of recording heads, etc., can solve problems such as falling off, hindering information reading or writing, etc., and achieves excellent dimensional accuracy, The effect of improving read or write performance

Active Publication Date: 2017-05-17
TOTOKU ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxide particles remaining on the surface of the magnetic head actuator 1 sometimes come off from the surface of the magnetic head actuator 1 in the hard disk drive, and the oxide particles that come off may fall on the magnetic disk 101, hindering the reading of information recorded on the magnetic disk 101. output or write

Method used

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  • Magnetic head driving arm, its manufacturing method and surface treatment method
  • Magnetic head driving arm, its manufacturing method and surface treatment method
  • Magnetic head driving arm, its manufacturing method and surface treatment method

Examples

Experimental program
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Effect test

Embodiment 1

[0084] Ready to Extrude as figure 1 The head actuator 1 made of an aluminum alloy (JIS A6061 T6, Mitsubishi Metal Corporation) having the shape shown is shown. The magnetic head actuator 1 is subjected to chemical polishing in the shape determining step, and acidic aqueous solution treatment in the oxide particle dissolving step.

[0085] Commercially available phosphoric acid reagents and nitric acid reagents were added to ion-exchanged water and mixed to prepare a chemical polishing solution used in the shape determination step. The concentration of chemical polishing liquid is set as: phosphoric acid 6.3mol / L, nitric acid 0.5mol / L. This chemical polishing solution was put into a corrosion-resistant resin container, and heated from the outside in a water bath while stirring vigorously with a stirrer. The temperature of the chemical polishing solution was set at 90°C. Then, the head actuator 1 is immersed in the chemical polishing solution. The immersion time of the head...

Embodiment 2

[0088] The head actuator of Example 2 was obtained in the same manner as in Example 1 except that the temperature of the acidic aqueous solution was 25° C. and the immersion time in the acidic aqueous solution was 80 seconds.

Embodiment 3

[0090]The head actuator of Example 3 was obtained in the same manner as in Example 1, except that the concentration of fluoride ions contained in the acidic aqueous solution was 0.8 mol / L and the temperature of the acidic aqueous solution was 15°C.

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Abstract

[Problem] To provide an actuator arm and a method for manufacturing same in which extremely few oxide particles are detached from the surface of an aluminum alloy actuator arm. [Solution] The problem is solved by an actuator arm in which protrusions due to oxide particles (30) do not exist on the surface (S) of the aluminum alloy actuator arm (1), the average diameter (D) of pits (40) comprising traces where the oxide particles (30) were removed being 1 to 5 µm. In such a case, it is preferable that the pits (40) in the range of ½ to 2 times the average diameter of the pits (40) are in a range of 10 to 100 per a measured region 20 µm square, and the reflection rate of the surface (S) of the actuator arm (1) is 10 to 40% within a range of wavelengths from 500 to 600 nm. Such an actuator arm (1) can be produced by causing the arm (1) to contact a solution containing fluoride ions after chemical polishing.

Description

technical field [0001] The present invention relates to a magnetic head driving arm for driving a magnetic head of a hard disk drive, a manufacturing method thereof, and a surface treatment method. Background technique [0002] A hard disk drive is one of the information recording devices of a computer, such as Figure 6 As shown, a magnetic disk 101 and a magnetic head 102 are provided. The magnetic head 102 is provided on the tip of the drive 103 , and moves to a predetermined position on the magnetic disk 101 by the rotation of the drive 103 to write or read information to the drive 103 . [0003] Usually, the driver 103 equipped with the magnetic head 102 is composed of the arm part 2, the coil part 3 and the support part 4, and its arm part 2 is provided with the slide bar 9 with the magnetic head 102 at the top, and the magnetic head connected to the slide bar 9 via the connecting part 8. The driving arm 1 constitutes. The coil unit 3 is constituted by a driving coil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/12G11B21/02
CPCC23F3/03C23G1/125G11B5/4833
Inventor 田泽敬二坂口明博
Owner TOTOKU ELECTRIC CO LTD
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