Optimum Design of Magnetic Head Slider Under Static and Dynamic Operation Conditions of Hard Disk Drive

1999 ◽  
Author(s):  
Yasuhisa Hattori ◽  
Hiromu Hashimoto ◽  
Masayuki Ochiai
Keyword(s):  
Objective Function ◽  
Hard Disk Drive ◽  
Optimum Design ◽  
Hard Disk ◽  
Disk Drive ◽  
Magnetic Head ◽  
Head Slider ◽  
Dynamic Operation ◽  
Operation Conditions ◽  
Design Variables

Abstract The aim of this paper is to develop the general methodology for the optimum design of magnetic head slider for improving the spacing characteristics between head slider and disk surfaces under the static and dynamic operation conditions of hard disk drive and to present an application of the methodology to IBM 3380-type slider design. In the optimum design, the objective function is defined as the weighted sum of minimum spacing, maximum difference of spacing due to variation of radial location of head and maximum amplitude ratio of slider motion. Slider rail width, taper length, taper angle, suspension position and preload are selected as the design variables. Before the optimization of magnetic head slider, the effects of these five design variables on the objective function are examined by the parametric study, and then the optimum design variables are determined by applying the hybrid optimization technique combining the direct search method and the successive quadratic programming (SQP). From the results obtained, the effectiveness of optimum design on the spacing characteristics of magnetic head slider is clarified.

Improvement of the Static and Dynamic Characteristics of Magnetic Head Sliders by Optimum Design

1999 ◽  
Vol 122 (1) ◽  
pp. 280-287 ◽  
Author(s):  
Hiromu Hashimoto ◽  
Yasuhisa Hattori
Keyword(s):  
Objective Function ◽  
Optimum Design ◽  
Amplitude Ratio ◽  
Optimization Technique ◽  
Hard Disk Drives ◽  
Maximum Amplitude ◽  
Disk Surface ◽  
Operating Conditions ◽  
Magnetic Head ◽  
Design Variables

The aim of this paper is to develop a general methodology for the optimum design of magnetic head sliders in improving the spacing characteristics between a slider and disk surface under static and dynamic operating conditions of hard disk drives and to present an application of the methodology to the IBM 3380-type slider design. To generate the optimal design variables, the objective function is defined as the weighted sum of the minimum spacing, the maximum difference in the spacing due to variation of the radial location of the head, and the maximum amplitude ratio of the slider motion. Slider rail width, taper length, taper angle, suspension position, and preload are selected as the design variables. Before the optimization of the head, the effects of these five design variables on the objective function are examined by a parametric study, and then the optimum design variables are determined by applying the hybrid optimization technique, combining the direct search method and successive quadratic programming. From the obtained results, the effectiveness of optimum design on the spacing characteristics of magnetic heads is clarified. [S0742-4787(00)03701-2]

Flow induced vibration of magnetic head suspension in hard disk drive

1986 ◽  
Vol 22 (5) ◽  
pp. 1022-1024 ◽  
Author(s):  
Y. Yamaguchi ◽  
K. Takahashi ◽  
H. Fujita ◽  
K. Kuwahara
Keyword(s):  
Hard Disk Drive ◽  
Hard Disk ◽  
Disk Drive ◽  
Magnetic Head ◽  
Flow Induced Vibration

Experimental Study of Dual Heater Slider Touchdown Detectability

2013 ◽  
Vol 284-287 ◽  
pp. 468-472
Author(s):  
Da Peng Zhao ◽  
Xiong Fei Wei ◽  
Yu Wang ◽  
Bin Liu ◽  
Sheng Xiang Chen ◽  
...  
Keyword(s):  
Experimental Study ◽  
Hard Disk Drive ◽  
Hybrid Method ◽  
Feasible Solution ◽  
Hard Disk ◽  
Areal Density ◽  
Disk Drive ◽  
Detection Methods ◽  
Magnetic Head ◽  
Single Method

With the increase of areal density in hard disk drive (HDD), the mechanical spacing between magnetic head and disk has decreased to sub~1nm. Under such ultra-low spacing, accurate spacing control becomes more important for lowering down the risk of head-disk interference and getting good bit per inch (BPI) performance. Dual-heater slider technology has been considered as a most useful solution. This paper introduces the advantages of dual heater in reading/writing spacing control. Furthermore, as a key issue in precise spacing control, the touchdown detectability of dual-heater slider was also investigated using three TD detection methods under writing and reading mode. Result shows that a single method is difficult to get the best TD detectability under both writing and reading mode. Instead, hybrid method may be a feasible solution.

scholarly journals Optimum Design of Thrust Air Bearing for Hard Disk Drive Spindle Motor

2010 ◽  
Vol 4 (1) ◽  
pp. 70-81 ◽  
Author(s):  
Mohd Danial IBRAHIM ◽  
Tadashi NAMBA ◽  
Masayuki OCHIAI ◽  
Hiromu HASHIMOTO
Keyword(s):  
Hard Disk Drive ◽  
Optimum Design ◽  
Hard Disk ◽  
Disk Drive ◽  
Spindle Motor ◽  
Air Bearing

The Simulation of Solder Bridging on TuMR Magnetic Head Connector

2012 ◽  
Vol 157-158 ◽  
pp. 144-148
Author(s):  
Reangroaj Roajanasiri ◽  
Nitin Afzulpurkar ◽  
Siridech Boonsang
Keyword(s):  
Product Design ◽  
Hard Disk Drive ◽  
Cost Reduction ◽  
Hard Disk ◽  
Disk Drive ◽  
Product Performance ◽  
Magnetic Head ◽  
High Productivity ◽  
Market Needs ◽  
Rework Process

The Hard Disk Drive is the important components in the present computer. The Hard Disk Drive manufacturing need high productivity and cost improvement to support the market needs. Many cost reduction are done on product design, material cost and manufacturing operation. This work shows an idea to improve productivity and also reduce the scrap cost by rework process. The product performance will be considered to prevent the reduction of reliability and degradation.

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