Effects of disc micro-waviness in an ultra-high density magnetic recording system

摘要

In an ultra-high density magnetic recording system (areal density approaching 100 Gbits/in~2), the control and understanding of head media spacing (HMS), the distance between the haad and the media, becomes extremely important. In an operating disc drive, the extent of modulation of HMS will depend on the ratio of the wavelength of disc topography features to the length of the slider. Disc topography in a range of 10