...Thin film coils, which have been used since around 1980, are still used for writing. However, since the 1990s, MR heads and GMR heads that use the magnetoresistance effect have rapidly increased density by about 100 times in 10 years, and as of 1998, high-density recording of more than 3 gigabytes per disk is possible. Currently, the rotation speed is about 4,000 to 10,000 revolutions per minute, the distance between the disk and the head is less than 0.1 μm, and the recording width is less than 2 μm. ... *Some of the terminology that refers to "MR Head" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…1980年頃から使われてきた薄膜コイルが書込みには現在も使われている。しかし90年以降,磁気抵抗効果を利用したMRヘッドやGMRヘッドによって10年で100倍ほどの速度で急速に高密度化が進み,98年現在では円盤1枚あたり3ギガバイト以上の高密度記録が可能になった。現在,回転数は毎分4000~1万回転程度,円盤とヘッドとの距離は0.1μm以下,記録幅が2μm以下である。… ※「MR ヘッド」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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