Investigation of the dynamic characteristics of light delivery for thermal assisted magnetic recording

Kyoung Su Park, Ki Hoon Kim, Young Pil Park, No Cheol Park

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Several new technologies have recently been proposed for high areal density greater than 5 Tb/in2 as next generation storage devices. Among these technologies is thermal assisted magnetic recording (TAMR). However, there are several dynamic and realistic problems associated with the current method of TAMR light delivery that must be resolved. In this paper, we investigate and discuss the dynamic characteristics for two kinds of light delivery systems using experimental and simulated results. We concluded that the optical fiber TAMR light delivery system had higher vertical and pitch stiffness. This could result in higher flying height modulation (FHM) on the disk surface and reduced TD-TO performance. Furthermore, since the optical fiber TAMR light delivery system has a lower positive pitch angle during unloading process, as soon as the air bearing disappears after the limiter is engaged, the contact possibility between the slider and the disk increases in unloading process. In addition, for the mounted laser diode (LD) TAMR light delivery system, we constructed a thermal-structural coupling finite element (FE) model of the entire TAMR system and simulated the thermal distribution and structural expansion according to temperature distribution. The results showed that the thermal problem was caused by heat produced by the LD, which can affect the head disk interface (HDI) problem in high areal density.

Original languageEnglish
Article number5929006
Pages (from-to)1992-1998
Number of pages7
JournalIEEE Transactions on Magnetics
Volume47
Issue number7
DOIs
Publication statusPublished - 2011 Jul 1

Fingerprint

Magnetic recording
Unloading
Semiconductor lasers
Optical fibers
Bearings (structural)
Hot Temperature
Heat problems
Limiters
Temperature distribution
Stiffness
Modulation

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Cite this

@article{9513d8daa4a849a08ea8452accdd460a,
title = "Investigation of the dynamic characteristics of light delivery for thermal assisted magnetic recording",
abstract = "Several new technologies have recently been proposed for high areal density greater than 5 Tb/in2 as next generation storage devices. Among these technologies is thermal assisted magnetic recording (TAMR). However, there are several dynamic and realistic problems associated with the current method of TAMR light delivery that must be resolved. In this paper, we investigate and discuss the dynamic characteristics for two kinds of light delivery systems using experimental and simulated results. We concluded that the optical fiber TAMR light delivery system had higher vertical and pitch stiffness. This could result in higher flying height modulation (FHM) on the disk surface and reduced TD-TO performance. Furthermore, since the optical fiber TAMR light delivery system has a lower positive pitch angle during unloading process, as soon as the air bearing disappears after the limiter is engaged, the contact possibility between the slider and the disk increases in unloading process. In addition, for the mounted laser diode (LD) TAMR light delivery system, we constructed a thermal-structural coupling finite element (FE) model of the entire TAMR system and simulated the thermal distribution and structural expansion according to temperature distribution. The results showed that the thermal problem was caused by heat produced by the LD, which can affect the head disk interface (HDI) problem in high areal density.",
author = "Park, {Kyoung Su} and Kim, {Ki Hoon} and Park, {Young Pil} and Park, {No Cheol}",
year = "2011",
month = "7",
day = "1",
doi = "10.1109/TMAG.2011.2134077",
language = "English",
volume = "47",
pages = "1992--1998",
journal = "IEEE Transactions on Magnetics",
issn = "0018-9464",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "7",

}

Investigation of the dynamic characteristics of light delivery for thermal assisted magnetic recording. / Park, Kyoung Su; Kim, Ki Hoon; Park, Young Pil; Park, No Cheol.

In: IEEE Transactions on Magnetics, Vol. 47, No. 7, 5929006, 01.07.2011, p. 1992-1998.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Investigation of the dynamic characteristics of light delivery for thermal assisted magnetic recording

AU - Park, Kyoung Su

AU - Kim, Ki Hoon

AU - Park, Young Pil

AU - Park, No Cheol

PY - 2011/7/1

Y1 - 2011/7/1

N2 - Several new technologies have recently been proposed for high areal density greater than 5 Tb/in2 as next generation storage devices. Among these technologies is thermal assisted magnetic recording (TAMR). However, there are several dynamic and realistic problems associated with the current method of TAMR light delivery that must be resolved. In this paper, we investigate and discuss the dynamic characteristics for two kinds of light delivery systems using experimental and simulated results. We concluded that the optical fiber TAMR light delivery system had higher vertical and pitch stiffness. This could result in higher flying height modulation (FHM) on the disk surface and reduced TD-TO performance. Furthermore, since the optical fiber TAMR light delivery system has a lower positive pitch angle during unloading process, as soon as the air bearing disappears after the limiter is engaged, the contact possibility between the slider and the disk increases in unloading process. In addition, for the mounted laser diode (LD) TAMR light delivery system, we constructed a thermal-structural coupling finite element (FE) model of the entire TAMR system and simulated the thermal distribution and structural expansion according to temperature distribution. The results showed that the thermal problem was caused by heat produced by the LD, which can affect the head disk interface (HDI) problem in high areal density.

AB - Several new technologies have recently been proposed for high areal density greater than 5 Tb/in2 as next generation storage devices. Among these technologies is thermal assisted magnetic recording (TAMR). However, there are several dynamic and realistic problems associated with the current method of TAMR light delivery that must be resolved. In this paper, we investigate and discuss the dynamic characteristics for two kinds of light delivery systems using experimental and simulated results. We concluded that the optical fiber TAMR light delivery system had higher vertical and pitch stiffness. This could result in higher flying height modulation (FHM) on the disk surface and reduced TD-TO performance. Furthermore, since the optical fiber TAMR light delivery system has a lower positive pitch angle during unloading process, as soon as the air bearing disappears after the limiter is engaged, the contact possibility between the slider and the disk increases in unloading process. In addition, for the mounted laser diode (LD) TAMR light delivery system, we constructed a thermal-structural coupling finite element (FE) model of the entire TAMR system and simulated the thermal distribution and structural expansion according to temperature distribution. The results showed that the thermal problem was caused by heat produced by the LD, which can affect the head disk interface (HDI) problem in high areal density.

UR - http://www.scopus.com/inward/record.url?scp=79959723869&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79959723869&partnerID=8YFLogxK

U2 - 10.1109/TMAG.2011.2134077

DO - 10.1109/TMAG.2011.2134077

M3 - Article

AN - SCOPUS:79959723869

VL - 47

SP - 1992

EP - 1998

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

SN - 0018-9464

IS - 7

M1 - 5929006

ER -