Integrated microheaters for in-situ flying-height control of sliders used in hard-disk drives

Mächtle, P.; Berger, Rüdiger; Dietzel, Andreas; Despont, M.; Häberle, W.; Stutz, R.; Binnig, G.; Vettiger, P.

doi:10.1109/memsys.2001.906512

Cited by 27 publications

(12 citation statements)

References 2 publications

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“…As the fly height was reduced from several mm to just a couple of nm as areal density was increased over the years, it also became necessary to control it more actively. For this, a resistive heating element is now implemented in any recording head for thermal fly-height control (TFC) [62]. The ABS profile and the flying characteristics are modified by the thermal protrusion when the …”

Section: Magnetic Read-head Designmentioning

confidence: 99%

Physics and Design of Hard Disk Drive Magnetic Recording Read Heads

Maat¹,

Marley²

2014

Handbook of Spintronics

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Magnetic recording heads always have been on the forefront of technology. A finished magnetic recording head that is manufactured in high volume is the outcome of a coordinated effort of various scientific and engineering disciplines. This chapter will focus on the physics and design of modern magnetic recording read heads. It will explain the underlying concepts of thin film magnetism and electron transport in nanostructures and describe the aspects of device scaling, magnetic stabilization, signal-to-noise considerations, and read-back performance of currently employed tunnel magnetoresistive read heads. An outlook on possible future read-head technologies such as currentperpendicular-to-the-plane giant magnetoresistance, scissor, two-dimensional magnetic recording, and spin-torque sensors will be given. List of Abbreviations

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Section: Magnetic Read-head Designmentioning

confidence: 99%

Physics and Design of Hard Disk Drive Magnetic Recording Read Heads

Maat¹,

Marley²

2014

Handbook of Spintronics

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“…Khanna et al (5) proposed a deformable slider using a bulk PZT in 1990. Recently, a partially deformable ABS using a thermal actuator (4) has been proposed. In this study, the direct actuation scheme is adopted because of low driving force, which is suitable for MEMSbased thin film actuators.…”

Section: Actuation Schemesmentioning

confidence: 99%

“…An active slider with an actuator was first proposed by YeackScranton et al (1) in 1990 for contact recording. Since then, various kinds of active sliders using a bulk PZT (2) , thin film PZT (3) and thermal actuators (4) have been reported. However they have not been in practical use.…”

Section: Introductionmentioning

confidence: 99%

A MEMS-Based Active-Head Slider for Flying Height Control in Magnetic Recording

Suzuki

Kurita

2004

JSME international journal. Ser. B, Fluids and thermal engineer

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This paper describes design and fabrication of a MEMS-based active-head slider using a PZT thin film for flying height control in hard disk drives. A piezoelectric cantilever integrated in an air bearing slider is used to adjust the flying height individually. A novel air bearing surface (ABS) geometry that minimizes the aerodynamic lift force generated beneath the head has been designed on the basis of the molecular gas film lubrication (MGL) theory. The slider with PZT actuator was fabricated monolithically by silicon micromachining.Performance of the actuator was tested by using an optical surface profiler. Furthermore, the fabricated slider was mounted on a suspension and flying height of the slider above a spinning disk has been measured by means of interferometry. Change in the head-disk spacing has been successfully confirmed by applying voltage to the PZT actuator.

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“…To achieve such an ultra-small head-disk clearance, the wide distribution of head-disk clearance due to current manufacturing tolerances is the biggest problem to be solved. To solve this problem, the concept of individual and in-situ adjustment of head-disk clearance by means of a micro-actuator built-in into a HDD slider has been proposed [1][2][3][4][5]. Applying this concept, the authors previously developed a thermal-flying-height-control (TFC) slider that carries a micro-thermal actuator (heater) at the trailing end of the slider [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Mechanical Clearance Change with Thermal Flying-height Control Slider at High Altitude

Ookubo

Shiramatsu

Kurita

et al. 2010

JAMDSM

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Clearance change between a magnetic head with a thermal flying-height control (TFC) function and a magnetic disk at high altitude was investigated. To clarify the change of head-disk clearance in the case of TFC actuation at high altitude, head-disk clearance change was experimentally evaluated as a function of altitude and head-disk clearance by using a TFC function. The evaluation results show that the head-disk clearance change is larger in the case with TFC actuation at high altitude than that in the case without TFC actuation.

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Integrated microheaters for in-situ flying-height control of sliders used in hard-disk drives

Cited by 27 publications

References 2 publications

Physics and Design of Hard Disk Drive Magnetic Recording Read Heads

Physics and Design of Hard Disk Drive Magnetic Recording Read Heads

A MEMS-Based Active-Head Slider for Flying Height Control in Magnetic Recording

Investigation of Mechanical Clearance Change with Thermal Flying-height Control Slider at High Altitude

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