Design and Analysis of a Novel Micro Flying Head in Mass Storage System

Abstract:

In order to meet the mass storage system’s need for higher density and integration, a novel structural design for micro flying head is conceived and an air bearing surface is designed based on micro fluid theory of hydrodynamics. Both positive and negative pressures can be generated by the air bearing surface, with the stiffness and motion stability enhanced by negative pressure. A lubrication model has been investigated with 1.5 order slip model of the generalized Reynolds equation, and the finite volume method is used for the simulation of the flying characteristics. The theoretical analysis and experimental results show that the proposed micro flying head exhibits satisfying flying stability, with head-disk spacing less than 75nm, and carrying capacity exceeding 93mN.

• Periodical: Applied Mechanics and Materials (Volumes 599-601)
• Pages: 248-253
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.599-601.248
• Online since: August 2014
• Authors: Yu He Li*, Kai Sen Guan, Da Peng Zhao, Yong Rong Qiu, Qing Xiang Li
• Keywords: Air Bearing Surface, Gas Lubrication Model, Negative Pressure, Solid Immersion Len

References

[1] Mansfield S M, Kino G S, Solid immersion microscope, Applied Physics Letters, 1990, 57. 24(1990) 2615-2616.

DOI: 10.1063/1.103828

[2] Assafrao A C, Kumar N, Wachters A J H, et al, Application of micro solid immersion lens as probe for near-field scanning microscopy, Applied Physics Letters, 104. 10(2014) 101101.

DOI: 10.1063/1.4867460

[3] Manfredonia M M, Nutter P W, Wright C D, FDTD analysis of recording light distribution in a near-field MAMMOS recording system, IEEE Transactions on Magnetics, 41. 10(2005) 2866-2868.

DOI: 10.1109/tmag.2005.854677

[4] Lee J H, Yoon H K, Jeong J H, et al, Tolerance analysis and compensation for focusing unit of near field recording system, Optical Memory and Optical Data Storage Topical Meeting, 2002, 111-113.

DOI: 10.1109/omods.2002.1028584

[5] Terris B D, Mamin H J, Rugar D, Near-field optical data storage, Applied Physics Letters, 68. 2(1996) 141-143.

DOI: 10.1063/1.116127

[6] Li H, Sagawa N, A Novel Active-Head Slider with a Shear-Mode PZT Actuator and Dual Thermal Actuator, IEEE Transactions on Magnetics, 49. 7(2013) 3771-3774.

DOI: 10.1109/tmag.2013.2241400

[7] Fang C, Zhang Y, Zhu H, Optimizing the optical field distribution of near-field SIL optical storage system using five-zone binary phase filters, Optics Communications, 285. 13(2012) 3042-3045.

DOI: 10.1016/j.optcom.2012.02.070

[8] Mitsuya Y, Modified Reynolds equation for ultra-thin film gas lubrication using 1. 5-order slip-flow model and considering surface accommodation coefficient, Journal of Tribology, 115. 2(1993) 289-294.

DOI: 10.1115/1.2921004

[9] Zhou W, Yu S, Hua W, et al, A modified slip model for gas lubrication at nanoscale head-disk interface, Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 227. 12(2013) 1367-1375.

DOI: 10.1177/1350650113493621

[10] Wu L, Bogy D B, Use of an upwind finite volume method to solve the air bearing problem of hard disk drives, Computational mechanics, 26. 6(2000) 592-600.

DOI: 10.1007/s004660000210