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Method and device for testing high temperature resistance performance of magnetic head

A technology of high temperature resistance and performance, applied in the field of testing magnetic head performance, can solve problems such as high temperature resistance performance testing, and achieve the effects of reliable detection accuracy and improved testing methods

Active Publication Date: 2016-08-10
SAE MAGNETICS (HK) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Moreover, the above method is only applicable to magnetic heads with built-in heating elements, and this method cannot be used to test the high temperature resistance of magnetic heads without heating elements

Method used

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  • Method and device for testing high temperature resistance performance of magnetic head
  • Method and device for testing high temperature resistance performance of magnetic head
  • Method and device for testing high temperature resistance performance of magnetic head

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Embodiment Construction

[0053] Several different preferred embodiments of the present invention will now be described with reference to the accompanying drawings, wherein like reference numerals in different drawings represent like parts. As mentioned above, the essence of the present invention is to provide a method for testing the high temperature performance of the magnetic head, which applies a magnetic field to the magnetic head in a direction passing through the ABS at an angle to the ABS, and the absolute value of the angle is an acute angle, thereby screening out the magnetic field at high temperature. A defective magnetic head that exhibits poor performance when used in the environment.

[0054] A conventional magnetic head for a magnetic head slider generally includes a read head for reading data from a magnetic disk and a write head for writing data to the magnetic disk. The read head is usually constituted by an MR read head, for example, there are current vertical planar (CPP), current i...

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Abstract

The invention discloses a method for testing high temperature resistance of a magnetic head. The magnetic head comprises an air bearing surface and two shielding layers. The method includes: applying a plurality of first magnetic fields with different intensities to the magnetic head in the first direction and measuring first output parameter curves; applying a plurality of second magnetic fields with different intensities to the magnetic head in the second direction and measuring second output parameter curves; and judging whether changes exceeding an admissible value exist in the first output parameter curves and the second output parameter curves or not so as to screen defective magnetic heads, wherein the first direction is perpendicular to the air bearing surface of the magnetic head, the second direction penetrates through the air bearing surface by an angle, and the absolute value of the angle is an acute angle value. The defective magnetic heads with poor high temperature resistance can be highly precisely screened without being heated.

Description

technical field [0001] The invention relates to a method for testing the performance of a magnetic head, in particular to a method for testing the high temperature resistance of the magnetic head. Moreover, the present invention relates to a device for testing the performance of the magnetic head, in particular to a device for testing the high temperature resistance performance of the magnetic head. Background technique [0002] A hard disk drive containing multiple spinning platters is commonly used to store data on magnetic media on its platter surfaces, while a movable head containing a read sensor is used to read data from the magnetic tracks on the platter surfaces. [0003] Currently, a magnetoresistive (MR) read head is widely used in mainstream magnetic heads because it is embedded with a higher-sensitivity MR element. Before the magnetic head is used, a series of performance tests must be carried out, such as high temperature resistance performance, dynamic flying ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B5/455
Inventor 雷卓文梁钊明林浩基李文杰梁国锦梁卓荣丁菊仁倪荣光
Owner SAE MAGNETICS (HK) LTD
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