# US 5,704,112 A · Method of manufacturing a magnetic head

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- Number: US 5,704,112 A
- Document ID: US5704112A
- Status: Granted
- Kind: A
- Application number: 08/660,596
- Filed: 1996-06-11
- Granted: 1998-01-06
- Earliest claimed: 1992-05-29
- Assignees: TDK Corporation
- Inventors: Shunichi Katase; Sigeo Tamura
- Web page: https://patentgrep.com/patent/US5704112A

## CPC

- G11B 5/3106: {where the integrated or assembled structure comprises means for conditioning against physical detrimental influence, e.g. wear, contamination (G11B5/3133 takes precedence)}
- G11B 5/10: Structure or manufacture of housings or shields for heads
- G11B 5/6005: {Specially adapted for spacing from a rotating disc using a fluid cushion}
- G11B 5/1871: {Shaping or contouring of the transducing or guiding surface}
- Y10T 29/49041: with significant slider/housing shaping or treating
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A slider for a magnetic head has air bearing surfaces in a medium opposing surface, and traces of processing are formed in the medium opposing surface excluding the air bearing surfaces to induce a strain in the medium opposing surface whereby the planer structure of the air bearing surfaces is controlled.

## Claims

### Claim 1

A method of controlling the degree of flatness of an air bearing surface in a medium opposing surface of a slider for a magnetic head, said slider also having a surface remote from the medium opposing surface, comprising inducing a strain in said air bearing surface by forming at least one trace of processing in at least one of (1) the surface remote from the medium opposing surface and (2) the medium opposing surface excluding the air bearing surface of the slider.

### Claim 2 (depends on 1)

The method of claim 1, wherein the at least one trace of processing is formed by machining the slider with a cutter or needle tool made of diamond, ceramics, or a carbide material.

### Claim 3 (depends on 1)

The method of claim 1, wherein the at least one trace of processing is formed by applying laser, electron rays, ion beams or ultrasonic waves to the slider.

### Claim 4 (depends on 1)

The method of claim 1, wherein the at least one trace of processing is formed by injecting fine abrasive particles.