Search Results - "Junguo Xu"

Contact/Clearance Sensor for HDI Subnanometer Regime by Junguo Xu, Shimizu, Yuki, Furukawa, Masaru, Jianhua Li, Sano, Yuichiro, Shiramatsu, Toshiya, Aoki, Yuichi, Matsumoto, Hiroyuki, Kuroki, Kenji, Kohira, Hidekazu

“…The fundamental performance of contact/clearance sensor, namely embedded contact sensor (ECS), is addressed in this paper. Both simulation and experiment…”
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Flying-height reduction of magnetic-head slider due to thermal protrusion by Kurita, M., Junguo Xu, Tokuyama, M., Nakamoto, K., Saegusa, S., Maruyama, Y.

“…Both the heat generated by the current in the write coil and the rise in the surrounding temperature cause local thermal protrusion (TPR) on magnetic-head…”
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Experimental and Numerical Simulation Study on Low-Surface Energy Slider With Thermal Flying-Height Control Function by Shimizu, Y., Ono, K., Umehara, N., Junguo Xu

“…The effects of slider surface energy on slider dynamics were investigated with both a component-level experiment and a slider dynamics simulation with a 2-D…”
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Nano-Scale Defect Mapping on a Magnetic Disk Surface Using a Contact Sensor by Shimizu, Yuki, Xu, Junguo, Kohira, Hidekazu, Kurita, Masayuki, Shiramatsu, Toshiya, Furukawa, Masaru

“…Targeting both higher touchdown sensitivity and highly accurate nanometer-scale defect detection on a disk surface, a thermal-contact sensor, integrated into a…”
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Formation of tribochemical layer of ceramics sliding in water and its role for low friction by Xu, Junguo, Kato, Koji

“…The formation of a tribochemical layer on silicon nitride sliding in water is studied. The wear mode changes from mechanically dominated wear to…”
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Mechanical Demagnetization at Head Disk Interface of Perpendicular Recording by Junguo Xu, Furukawa, M., Nakamura, A., Honda, M.

“…We investigated the mechanism of nanometer-depth scratches triggering adjacent track interference (ATI) by applying DC erasure magnetic fields to scratch areas…”
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Triple-Stage-Actuator System of Head-Positioning Control in Hard Disk Drives by Atsumi, T., Nakamura, S., Furukawa, M., Naniwa, I., Junguo Xu

“…In this paper, we propose a triple-stage actuator system with a thermal actuator to increase a servo bandwidth of a head-positioning control system in hard…”
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Two-Dimensional Flying-Height Modulation Mapping at HDD Drive Level by Shimizu, Y., Junguo Xu

“…A measurement system for flying-height modulation of magnetic heads is proposed, and two-dimensional (2-D) flying-height modulation mapping is demonstrated at…”
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Thermal mechanics of a contact sensor used in hard disk drives by Li, Jianhua, Xu, Junguo, Liu, Jin, Kohira, Hidekazu

“…A typical thermal-contact sensor (TCS) used in hard-disk drives was investigated by the simulation. Analytical solution to solve temperature variation of…”
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Simulation studies of contact sensor for disk defect mapping by Liu, Jin, Xu, Junguo, Li, Jianhua

“…The keep increasing areal density in hard disk drive demands reducing the clearance between the read/write element and the disk surface. A clearance of 2 nm…”
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Frictional heating effect on thermal protrusion in head disk interface by Li, Jianhua, Xu, Junguo, Furukawa, Masaru

“…The frictional heating effect on the clearance loss in the reader and writer elements of hard disk drive was investigated by conducting a coupled simulation…”
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Partial-contact head-disk interface approach for high-density recording by Junguo Xu, Kohira, H., Tanaka, H., Saegusa, S.

“…An isolated-pad-type slider and a narrow-trailing-edge-type slider were designed and fabricated for partial-contact head-disk interface. Evaluation results…”
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Thermal actuator for accurate positioning read/write element in hard disk drive by Liu, Jin, Ono, Kyosuke, Xu, Junguo, Li, Jianhua, Furukawa, Masaru

“…Flying height control (TFC) sliders with thermal actuation, which make it possible to control head disk spacing, have been introduced in commercial products…”
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Study on head instability using Flying-QST tester for HDDs by Furukawa, Masaru, Xu, Junguo, Kato, Yukio, Wada, Tatsuhiko

“…We developed a tester consisting of minor-loop and major-loop quasi-static test (QST) units in order to better understand head instabilities under conditions…”
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Iteration method for analysis of write-current-induced thermal protrusion by Li, Hui, Kurita, Masayuki, Xu, Junguo, Yoshida, Shinobu

“…This article presents a detailed iteration method for coupled air bearing and thermal-structure analysis, and introduces a node-to-node schematic for mapping…”
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Effect of reduction of slider pitch-mode vibration on magnetic-recording performance at low-clearance head–disk interface by Shimizu, Yuki, Xu, Junguo, Li, Jianhua, Kohira, Hidekazu, Hashimoto, Kiyoshi

“…Aiming at improvements of both stability of slider flying and magnetic-recording performance under a low-clearance condition, a “narrow-grooved slider” was…”
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Scratch-Induced Demagnetization of Perpendicular Magnetic Disk by Furukawa, M., Junguo Xu, Shimizu, Y., Kato, Y.

“…The mechanism of scratch-induced demagnetization was studied in perpendicular magnetic recording (PMR) disks. These scratches, which may occur on the disk's…”
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Feasibility study of thermal positioning control actuator for hard disk drives by Furukawa, Masaru, Xu, Junguo, Liu, Jin, Li, Jianhua, Nosaki, Shoya, Otsuki, Haruaki, Suzuki, Kenji, Ono, Kyosuke

“…We have developed an actuator with a heater embedded in the head slider. This actuator, called the thermal positioning control (TPC) actuator, is integrated…”
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Mechanism study of scratch-induced demagnetization for perpendicular magnetic disks by Furukawa, Masaru, Xu, Junguo, Shimizu, Yuki, Kato, Yukio

“…The mechanism for scratch-induced demagnetization was studied in perpendicular magnetic recording (PMR) disks. Scratches, which may occur on a disk’s surface…”
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Fluorine-ion-implanted air-bearing surface for low-friction head–disk interface by Shimizu, Yuki, Umehara, Noritsugu, Xu, Junguo

“…With the aim of reducing the lubricant–slider interaction by reducing slider surface energy, we fabricated several types of sliders with fluorine-ion-implanted…”
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