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Grinding blank, method for producing same, and method for producing diamond grinding blank

A manufacturing method and diamond technology, applied to the blank for grinding and its manufacture, and the field of diamond grinding blank manufacturing, which can solve problems such as short circuit, magnetic head function failure, etc., reduce defective rate, reduce roughness, and improve cracking phenomenon Effect

Active Publication Date: 2022-02-22
SAE MAGNETICS (HK) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

If these scratches pass right through the head, a short circuit will be formed, causing the head to fail

Method used

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  • Grinding blank, method for producing same, and method for producing diamond grinding blank

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Embodiment Construction

[0025] 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 blank for grinding, a diamond grinding blank, which can enhance the diamond particles embedded in it more firmly, and the cracking of the blank during the grinding process is improved, thereby reducing the abrasiveness of the abrasive. defective rate.

[0026] In the present invention, the grinding blank is especially suitable for the grinding process in the manufacturing process of the magnetic head, for example, grinding the elongated bar with a plurality of magnetic head bodies. As an improvement, lead is added to the blank, the content of lead is less than 1% of the total mass of the blank, and the performance of the blank can be greatly improved with the optimized content ratio.

[0027] ...

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Abstract

A blank for grinding includes blank and lead, and the content of lead is less than 1% of the total mass of the blank. The manufacturing method of the blank comprises: adding the blank and lead to an electric furnace for melting in sequence, wherein the content of lead is less than 1% of the total mass of the blank; pouring the molten liquid of the blank and lead into a blank mold for cooling and forming to form the blank; and The green body is annealed. The invention can improve the firmness of the diamond particles embedded therein, and the blank cracking phenomenon is improved during the grinding process, thereby reducing the defective rate of the ground object.

Description

technical field [0001] The invention relates to abrasive materials, in particular to a blank for grinding, a manufacturing method thereof, and a manufacturing method of a diamond grinding blank. Background technique [0002] Disk drives (HDDs) are commonly used information storage devices. As the recording density of HDD increases, there is an urgent need to improve the performance of the magnetic head and the magnetic recording medium. In the HDD, the magnetic head embedded in the slider flies over the surface of the magnetic recording medium to read and write data. [0003] Currently, tunneling magnetoresistive heads (TMR) have been widely used instead of giant magnetoresistive heads (GMR) due to their excellent sensitivity, and their magnetoresistance is usually 400-1000 ohms. Compared with GMR, TMR has two significant differences in structure. One is that the working current passes through the direction perpendicular to each layer of the read head, and the other is to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B5/127
Inventor 藤井隆司陈世雄齐斌廖德英
Owner SAE MAGNETICS (HK) LTD
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