Investigation of 2 Gb/in/sup 2/ magnetic recording at a track density of 17 kTPI

--In magnetic recording, information data is written by the perpendicular magnetization component even in a longitudinally oriented recording medium, especially when it consists of non-interacting fine magnetic particles. The future prospect of magnetic recording has been theoretically investigated using a computer simulation from the viewpoint of media having both higher recording resolution and higher output. Recording bit density over 500 kFCI accompanied with higher surface flux density has been confirmed in perpendicular magnetic recording not only by experiments but also by computer simulations. Novel techniques on head-to-medium interfaces and very narrow track single-pole heads for a hard disk magnetic recording system have been also discussed to materialize ultra-high density perpendicular magnetic recording.

Section: Theoretical Prospect Computer Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Prospects of Perpendicular Magnetic Recording

Nakamura

1991

“…A Hitachi group has recently repOlted the attainment of 2 ~b/in2 uS.ing similar magnetic components but mcorp?ratmg a servo scheme based on optical recordmg technology [6,7,8,9]. We will review and examiI~e some of th~ details of these high density record1l1g demonstratIOns.…”

Section: Introductionmentioning

confidence: 99%

High Density Magnetic Recording for Rigid Disk Systems

Yogi¹

1991

A?stract ---The areal density of rigid ~isk drive~ is cUlTently approaching 100 Mb/in2 and is expected to con~I1~ue ~o double. every 2-3 years, reach1l1g 1 Gb/m 2 by the year 2000. We will review the current status o~ ngId dISk record111g and I:e~ent pI:ogress iI~ ex~endiI~g th~ areal density into the gigabit/in2 regime. Emphasis wIll be placed on the transItIOn nOIse of th111 film dIsks 111 the hio-h density environment. We will examine some of the challenges and possible limitations in-attaining high d~nsity operation.

“…For 10 Gb/in 2 packing density perpendicular recording, the required trackwidth and pole thickness for the head is about IJ.l.m and 0.1 J.l.m respectively [l,2]. On the other hand, as areal packing density continues to increase, the coercivity of the recording media is increasingly higher in order to reduce the medium noise [3] and to store enough energy in the increasingly smaller bit volumes. This requires the recording head being able to produce high writing field in order to have a good writability on high coercivity media.…”

Section: Introductionmentioning

confidence: 99%

Design Issues of Fully Integrated Submicron Trackwidth Single-pole Head for 10 Gb/in<sup>2</sup> Areal Density Perpendicular Rigid Disks

Pan

Mapps

1994

Abstract--The write/read perfonnances of the submicron trackwidth flexhead type single pole heads and the crosstalk of the multitrack array heads were quantitatively simulated using three dimensional finite element method. For heads with very thin poles (down to 0.1 J.Ull), pole saturation is the major problem which limits the maximum writing field of the heads. A pole material with Bs of up to 2.1 Tesla is required in order to produce the desired write field for good writability on recording media with coercivity of 150 kAlm. The read efficiency of such a head is only about 0.3. The write-read crosstalk level for the array heads is very large.