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Microsystem Technologies

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16-06-2020 | Technical Paper

A method for monitoring head media spacing change in a hard disk drive using an embedded contact sensor

Authors: Rahul Rai, Puneet Bhargava, Bernhard Knigge, Aravind N. Murthy

Published in: Microsystem Technologies | Issue 11/2020

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Abstract

Growth in the demand for higher capacity hard disk drives has pushed the requirement for head-media spacing to sub-nanometer levels. The drop in operational clearance makes a head-disk interface more susceptible to potential head-wear and contamination related issues. Such degradation processes are often accompanied by a noticeable shift in the head-disk clearance. Hence monitoring an interface for a spacing change can be helpful in early detection of its imminent failure. In this paper, we present a method to detect the change in head-disk spacing using an embedded contact sensor (ECS). This technique involves the analysis of ECS dynamic response for an interface that is subjected to heater induced spacing modulations. As the head moves closer to the disk surface, the magnitude of the ECS frequency components can be used to determine the ‘characteristic spacing’ which can be used as a metric to detect any physical change for a given interface.

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Aoki K, Hoshino T, Iwase T et al (2005) Thermal pole-tip protrusion analysis of magnetic heads for hard disk drives. IEEE Trans Magn 41:3043–3045. https://doi.org/10.1109/tmag.2005.855253CrossRef

Disk Drive Thermal Conditioner. In: Pond Engineering Laboratories, Inc. http://www.pondengineering.com/k49-disk-drive-thermal-conditioner. Accessed 15 Dec 2019

Guo X-C, Raman V, Karis TE, Yao YZ (2007) Flyability failures due to siloxanes at the head-disk interface revisited. IEEE Trans Magn 43:2223–2225. https://doi.org/10.1109/tmag.2007.893418CrossRef

Juang J-Y, Bogy DB (2007) Air-bearing effects on actuated thermal pole-tip protrusion for hard disk drives. J Tribol 129:570–578. https://doi.org/10.1115/1.2736456CrossRef

Juang J-Y, Nakamura T, Knigge B et al (2008) Numerical and experimental analyses of nanometer-scale flying height control of magnetic head with heating element. IEEE Trans Magn 44:3679–3682. https://doi.org/10.1109/tmag.2008.2002612CrossRef

Khurshudov A, Ivett P (2003) Head–disk contact detection in the hard-disk drives. Wear 255:1314–1322. https://doi.org/10.1016/s0043-1648(03)00201-1CrossRef

Knigge B, Suthar T, Baumgart P (2006) Friction, heat, and slider dynamics during thermal protrusion touchdown. IEEE Trans Magn 42:2510–2512. https://doi.org/10.1109/tmag.2006.880473CrossRef

Knigge B, Shephard S, Kermiche N, Disk drive detecting head touchdown by applying DC + AC control signal to fly height actuator. United States patent US8970978B1

Kurita M, Shiramatsu T, Miyake K et al (2006) Active flying-height control slider using MEMS thermal actuator. Microsyst Technol 12:369–375. https://doi.org/10.1007/s00542-006-0104-4CrossRef

Li J, Xu J, Liu J, Kohira H (2013) Thermal mechanics of a contact sensor used in hard disk drives. Microsyst Technol 19:1607–1614. https://doi.org/10.1007/s00542-013-1870-4CrossRef

Ma Y, Xue S, Peng J-P, Bogy DB (2015) Study of head-disk interface characterization using touchdown sensor and electromagnetic signal in hard disk drives. IEEE Trans Magn 51:1–4. https://doi.org/10.1109/tmag.2015.2434371CrossRef

Machtle P, Berger R, Dietzel A et al (2001) Integrated microheaters for in-situ flying-height control of sliders used in hard-disk drives. In: Technical digest MEMS 2001 14th IEEE international conference on micro electro mechanical systems (Cat No01CH37090). https://doi.org/10.1109/memsys.2001.906512

Marchon B, Saito K, Wilson B, Wood R (2011) The limits of the Wallace approximation for PMR recording at high areal density. IEEE Trans Magn 47:3422–3425. https://doi.org/10.1109/tmag.2011.2157672CrossRef

Matthes LM, Knigge B, Talke FE (2014) Head-disk proximity sensing using contact sensors in hard disk drives. IEEE Trans Magn 50:1–4. https://doi.org/10.1109/tmag.2014.2322587CrossRef

Raman V, Nguyen T (2018) Smear generation at the head-disk interface and implications for reliability. In: 2018 Asia-Pacific magnetic recording conference (APMRC). https://doi.org/10.1109/apmrc.2018.8601072

Raman V, Gillis D, Wolter R (1999) Flyability failures due to organic siloxanes at the head/disk interface. J Tribol 122:444–449. https://doi.org/10.1115/1.555380CrossRef

Seo YW, Ovcharenko A, Bilich D, Talke FE (2017) Experimental investigation of hydrocarbon contamination at the head–disk interface. Tribol Lett. https://doi.org/10.1007/s11249-017-0835-7CrossRef

Shi W, Zhu L, Bogy D (1987) Use of readback signal modulation to measure head/disk spacing variations in magnetic disk files. IEEE Trans Magn 23:233–240. https://doi.org/10.1109/tmag.1987.1064817CrossRef

Shimizu Y, Xu J, Kohira H et al (2011) Nano-scale defect mapping on a magnetic disk surface using a contact sensor. IEEE Trans Magn 47:3426–3432. https://doi.org/10.1109/tmag.2011.2144961CrossRef

Shiramatsu T, Kurita M, Miyake K et al (2006) Drive integration of active flying-height control slider with micro thermal actuator. IEEE Trans Magn 42:2513–2515. https://doi.org/10.1109/tmag.2006.880564CrossRef

Sonoda K (2012) Flying instability due to organic compounds in hard disk drive. Adv Tribol 2012:1–6. https://doi.org/10.1155/2012/170189CrossRef

Strom B, Lee S, Tyndall G, Khurshudov A (2007) Hard disk drive reliability modeling and failure prediction. IEEE Trans Magn 43:3676–3684. https://doi.org/10.1109/tmag.2007.902969CrossRef

Wallace RL (1951) The reproduction of magnetically recorded signals. Bell Syst Tech J 30:1145–1173. https://doi.org/10.1002/j.1538-7305.1951.tb03700.xCrossRef

Wang Y, Wei X (2018) Wear study for dual-heater slider under high temperature. IEEE Trans Magn 54:1–4. https://doi.org/10.1109/tmag.2018.2834959CrossRef

Wang Y, Ye Z-S, Tsui K-L (2014a) Stochastic evaluation of magnetic head wears in hard disk drives. IEEE Trans Magn 50:1–7. https://doi.org/10.1109/tmag.2013.2293636CrossRef

Wang Y, Wei X, Tsui K-L, Chow TWS (2014b) Tribological degradation of head–Disk interface in hard disk drives under accelerated wear Condition. IEEE Trans Magn 50:27–33. https://doi.org/10.1109/tmag.2013.2286579CrossRef

Wang Y, Wei X, Liang X et al (2016) Slider dynamics and wear behaviors at subnano-clearance head–disk interface. IEEE Trans Magn 52:1–9. https://doi.org/10.1109/tmag.2015.2473816CrossRef

Xu J, Shimizu Y, Furukawa M et al (2014) Contact/clearance sensor for HDI subnanometer regime. IEEE Trans Magn 50:114–118. https://doi.org/10.1109/tmag.2013.2286619CrossRef

Ye Z-S, Xie M, Tang L-C (2013) Reliability evaluation of hard disk drive failures based on counting processes. Reliab Eng Syst Saf 109:110–118. https://doi.org/10.1016/j.ress.2012.07.003CrossRef

Yuan Z-M, Liu B, Ong CL, Santoso B (2011) A new code pattern of triple harmonic method for precise in-situ FH measurement in perpendicular recording. IEEE Trans Magn 47:3418–3421. https://doi.org/10.1109/tmag.2011.2156401CrossRef

Zhang M, Liu B, Hu S (2009) Reader as a contact detector. Appl Phys Lett 94:241911. https://doi.org/10.1063/1.3157126CrossRef

Title: A method for monitoring head media spacing change in a hard disk drive using an embedded contact sensor
Authors: Rahul Rai
Puneet Bhargava
Bernhard Knigge
Aravind N. Murthy
Publication date: 16-06-2020
Publisher: Springer Berlin Heidelberg
Published in: Microsystem Technologies / Issue 11/2020
Print ISSN: 0946-7076
Electronic ISSN: 1432-1858
DOI: https://doi.org/10.1007/s00542-020-04911-9

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