磁気ディスク装置

Magnetic disk device

Abstract

(57)【要約】 【目的】 磁気ヘッドの位置を示すトラッキングエラー 信号における信号上の不感帯をなくして、磁気ヘッドの 位置決めを正確に、かつ速く行えるようにする。 【構成】 サーボパターンPs 1 及びPs 2 並びに記録 トラックパターンPwを含む記録領域2と上記サーボパ ターンPs 1 及びPs 2 並びに記録トラックパターンP w以外の非記録領域3との間に段差hを設ける。例え ば、ディスク基板全面に磁性体膜を形成した後、エッチ ング加工を施して、磁性体膜による記録領域を形成す る。そして、サーボパターン幅TsとトラックピッチT pとの関係を、Tp(n−0.1)≦Ts≦Tp(n+ 1)とし、かつ磁気ヘッドの磁気的読出し幅Wrと上記 トラックピッチTpとの関係を0.9Tp≦Wr≦1. 1Tpとする。
PURPOSE: To accurately and quickly position a magnetic head by eliminating a signal nonsensitive band in a tracking error signal showing a position of the magnetic head. CONSTITUTION: A step (h) is provided between a recording area 2 including servo patterns PS 1 and PS 2 and a recording track pattern Pw and a nonrecording area 3 other than the above servo patterns PS 1 and PS 2 and the recording pattern Pw. For example, the whole surface of a disk substrate is formed with a magnetic film, and is then processed by etching, so that the recording area is formed by the magnetic film. Then, a relationship between a servo pattern width Ts and a track pitch Tp is specified as Tp(n-0.1)≤Ts≤Tp(n+1), and a relationship between a magnetic read width Wr of the magnetic head and the above track pitch Tp is specified as 0.9Tp≤Wr≤1.1Tp. COPYRIGHT: (C)1994,JPO&Japio

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