超越兆位元之磁性垂直記錄媒體

Perpendicular Magnetic Media for 1 Tera Bits/in^2 and Beyond

林夢嫺(Meng-Shian Lin) ； 何建新(Chien-Hsin Ho) ； 賴志煌(Chih-Huang Lai)

《科儀新知》 159期 (2007/08) Pp. 50-56

https://doi.org/10.29662/IT.200708.0006

摘要

硬碟從1956年問世以來，其記錄密度已經增加超過5000萬倍。人們認為磁記錄重要的物理限制是超順磁效應，也就是所記錄的資料會因熱擾動而遺失。此效應在產業上促使傳統的水平式記錄媒體，於2006年正式被垂直式記錄媒體所取代。隨著儲存密度增高，垂直式記錄提供了未來超高記錄密度媒體最可行的方式。然而超順磁效應所造成的威脅，並不會因為目前垂直式記錄媒體的誕生而被解決。根據計算，未來要邁向兆位元(1 Tbit/in^2)的超高記錄密度，每個位元的平均大小將只有25奈米，磁記錄媒體所將面臨的挑戰會更加嚴峻。本文將針對各項新穎的超高密度之磁記錄媒體發展做一簡介。

並列摘要

The recording density of HDD (hard disc drive) has increased 500,000,000 times since 1956. The superparamagnetic (SPM) effect, which may cause the loss of stored information, has been believed as a critical limitation for magnetic recording. In magnetic industry, SPM effect has promoted the perpendicular media in market to replace the conventional longitudinal media in 2006. To increase the recording density of HDD, the perpendicular recording provides a solution for future high- density recording. The current perpendicular recording media just postponed the coming of the SPM effect. However, the problem becomes even severe for the development of ultrahigh recording density of 1 Tbit/in^2, which requires each magnetic bit size smaller than 25 nm. In this article, we discuss the novel technology development of ultra-high-density magnetic media.