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Grinding guide with dual-purpose for producing magnetoresistive head

A guide and magneto-resistive technology, applied in the direction of magnetic heads using thin films, nanotechnology for information processing, grinding machine tools, etc., can solve the problems of unsatisfactory accuracy, inaccurately known offset, insufficient uniform bar height, etc. question

Inactive Publication Date: 2007-09-05
SAE MAGNETICS (HK) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the offset between the narrow readhead and the wide LEG is neither precisely known nor uniform
Therefore, the resulting accuracy of reading the height of the headline is unsatisfactory
[0006] Also, uniform bar heights are not enough

Method used

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  • Grinding guide with dual-purpose for producing magnetoresistive head
  • Grinding guide with dual-purpose for producing magnetoresistive head
  • Grinding guide with dual-purpose for producing magnetoresistive head

Examples

Experimental program
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Effect test

Embodiment Construction

[0016] Detailed Description of Preferred Embodiments

[0017] FIG. 1 is a plan view of an integrated grinding guide according to an embodiment of the present invention. The Electron Polishing Guide (ELG) of the present invention can be used for readhead resistance control if the profile of film resistivity, read width and bar height offset over a row is known. However, the last two parameters are difficult to measure. Alternatively, the readhead can be used as a milling guide. The actual bar height cannot be precisely known without knowing the exact read width. However, the false bar height can be calculated by using the nominal read width. The pseudo bar height increases smoothly and monotonically with the actual bar height. In addition, the desired readhead resistance was obtained when the pseudostrip height reached its nominal target value. It is therefore advantageous in this regard to use the readhead as a milling guide.

[0018] A major difficulty is that the readh...

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PUM

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Abstract

An integrated lapping guide (ILG) is descrbed, including at least one fetch head and electronic lapping guide (ELG). In an example, ELG is offset from the height of fetch head, and the resistance between the fetch head and ELG can be measured in the course of lapping process, and in the starting stage of lapping process ELG controls the change of ILG resistance and provides the long-range strip height control considered to inclination and bending of row of magnetoresistive (MR) head, and in the latter stage of lapping process the fetch head controls the change of ILG resistance and provides short and uniform fetch head resistance control, and between the long-range strip height control and short-range uniform fetch head resistance control its transition is smooth.

Description

field of invention [0001] The present invention is directed to the manufacture of slider components for use in disk drives and the like. More specifically, the invention pertains to lapping guides involved in the manufacture of magneto-resistive head structures. Background technique [0002] A hard disk drive is a general information storage device that basically consists of a series of rotatable platters accessed by magnetic read-write elements. These data transfer elements, generally referred to as transducers, are typically carried by and embedded in a slider body that maintains close relative positions on discrete data tracks formed on the disc to allow reading or writing. operation. To properly position the transducer relative to the disk surface, an air bearing surface (ABS) formed on the slider body experiences a fluid air flow that provides sufficient lift to "fly" the slider and transducer over the disk data tracks. ". The high speed rotation of the disk creates...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B5/39B24B37/04B24B37/27G11B5/31
CPCB82Y10/00G11B5/3169B82Y25/00B24B37/048G11B5/3173B24B37/27G11B2005/3996G11B5/3116G11B5/3903G11B5/3166
Inventor L·-Y·朱
Owner SAE MAGNETICS (HK) LTD