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

Suzuki, Kenji; Kurita, Masayuki

doi:10.1299/jsmeb.47.453

Cited by 15 publications

(6 citation statements)

References 9 publications

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“…Kurita et al (2003) proposed a slider using a PZT sheet. Suzuki and Kurita (2003) proposed a slider using PZT sol-gel thin film. Although these active-head sliders with PZT/silicon unimorph actuator were as large as the current sliders, they could not be adapted to the conventional slider process, because they required processing on the surface opposite the ABS.…”

Section: Objectivementioning

confidence: 99%

“…The upper electrode is connected to a pad on the magnetic head of the slider. The structures of the proposed active-head sliders (Tagawa et al 2003;Kurita et al 2003;Suzuki and Kurita 2003) have low stiffness, while that of PFC slider has greater stiffness because PFC slider does not have a supporting beam structure and the magnetic head is only driven by PZT deformation. The stiffness has a great influence on fly ability.…”

Section: Objectivementioning

confidence: 99%

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Active-head slider with piezoelectric actuator using shear-mode deformation

et al. 2009

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The active-head slider technology for hard disk drive is one of the most promising means to decrease flying height. This paper describes a piezoelectric flying height control slider which has a faster dynamic response compared with conventional active-head sliders. This slider can be also adapted to the conventional slider-fabrication process. PZT layer located near the magnetic head has shear mode deformation by applying electric voltage between the upper and lower electrodes when the flying height of magnetic head needs to be decreased or increased. We fabricated a prototype with single crystal Si substrate for feasibility study. Our evaluation of the prototype revealed that the piezoelectric constant of the shear mode deformation was 0.88 nm/V, and the dynamic response was 50 kHz. The shape of the air bearing surface was optimized by simulations using a robust design method. We found that the stroke was 8 nm for an applied voltage of 11 V if the flying height was 11 nm with no deformation in PZT.

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Section: Objectivementioning

confidence: 99%

Section: Objectivementioning

confidence: 99%

Active-head slider with piezoelectric actuator using shear-mode deformation

et al. 2009

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“…Researchers have tried to apply the piezoelectric actuation technology into the slider design to control the active flying height [1][2][3][4][5]. However, its complicated fabrication process [2,3] and the high operating temperature [6] prevented the mass production of the piezoelectric actuation slider. As an alternative solution, the thermal actuation technology was newly developed to control the head-media-spacing (HMS) adaptively [7], where a micro-heater in a slider manages the amount of thermal expansion of read/write elements outward the air bearing surface (ABS).…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis simulations of thermomechanical head-disk interface contact in thermal flying-height control slider design

Song

Yeo

2016

Tribology International

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In order to achieve higher recording density in hard disk drive (HDD), thermal flyingheight control (TFC) slider design has been used to reduce the physical spacing between the read/write elements in the slider and the rotating disk surface. During the read/write operation in hard disk drives, the intermittent contact at the head-disk interface (HDI) directly affects its performance and reliability. In this study, the thermomechanical micro-contact between a TFC slider and a disk defect was systematically investigated through finite element analysis (FEA) modeling and simulations. The thermal actuation technology in a TFC slider was incorporated into the FEA model to enable the thermal protrusion of read/write sensors outward the air bearing surface (ABS). In order to obtain the scientific relationship between the thermal protrusion and the resulting HDI contact behavior, parametric FEA simulations were carried out based on the 2 3 -factorial design of experiment (DOE), where the surface temperature rise and the residual deformation on the TFC slider surface were used as the output parameters. From the statistical data analysis, it could be found that the larger thermal protrusion resulted in higher temperature rise and more residual deformation.

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

Cited by 15 publications

References 9 publications

Active-head slider with piezoelectric actuator using shear-mode deformation

Active-head slider with piezoelectric actuator using shear-mode deformation

Finite element analysis simulations of thermomechanical head-disk interface contact in thermal flying-height control slider design

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

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