Title :
Glass-ceramic substrates for 1 Gb/in2 and beyond
Author :
Rauch, Gary C. ; Liu, Jia Jay ; Lee, Sang Y. ; Boszormenyi, Istvan ; Gao, Chuan ; Gui, Jing ; Kuo, David ; Marchon, Bruno ; Vierk, Stan ; Malmhall, R.
Author_Institution :
Seagate Recording Media, Fremont, CA, USA
fDate :
9/1/1996 12:00:00 AM
Abstract :
Glass-ceramic substrates based on the lithium silicate system have been found to have excellent tribological performance, associated with the inherent bump topography produced by differential polishing of α-quartz and a lithium silicate/glass matrix. This paper explores the extendibility of lithium silicate alternative substrates to meet the needs of recording media for use at densities approaching and exceeding 1 Gb/in2. Flatness, topography, magnetic performance, and resistance to environmental attack are shown to be extendible to higher density, and alternatives to the inherent bump topography are presented
Keywords :
ceramics; environmental degradation; friction; hard discs; magnetic recording; magnetic recording noise; phosphosilicate glasses; polishing; substrates; surface texture; wear; wear resistance; differential polishing; environmental attack resistance; flatness; glass-ceramic substrates; head-disc interface; high density recording; inherent bump topography; magnetic performance; magnetic recording media; optimised texture; stiction; texture noise; tribological performance; wear resistance; zone texturing; Abrasives; Acceleration; Clamps; Crystallization; Glass; Rough surfaces; Size control; Surface roughness; Surface topography; Surface treatment;
Journal_Title :
Magnetics, IEEE Transactions on
