NDLI: Development of contact sliders with nanotextures by femtosecond laser processing

Content Provider	Springer Nature Link
Author	Tagawa, N. Takada, M. Mori, A. Sawada, H. Kawahara, K.
Copyright Year	2006
Abstract	This paper describes the development of novel contact sliders with nanotextures by means of femtosecond laser processing. In order to achieve a magnetic recording density of more than 1 Tb/in$^{2}$, it is necessary to create an ultralow head-disk interface (HDI) spacing, i.e., less than 2–3 nm. Thus far, various new concept HDI technologies have been proposed for developing such near-contact or contact recording HDI. In this paper, the authors propose the concept of a novel contact slider. This slider has nanotextures fabricated by femtosecond laser processing. Sliders with five DLC thin-film pads on the air bearing surfaces were used, and the pad diameter and thickness are 40 μm and 40 nm, respectively. The fabrication process of nanotextures on the DLC thin-film pads employed a femtosecond Ti:sapphire laser. The laser wavelength and pulse width are 800 nm and 120 fs, respectively. Contact slider experiments were also carried out, using (1) the fabricated contact sliders having nanotextures with different RMS heights and (2) a contact slider without nanotextures. The nanotribological characteristics of the contact HDI as well as the dynamics of the contact sliders were investigated. In addition, the behavior of the ultrathin liquid lubricant film was evaluated by using a surface reflectance analyzer (SRA) after the contact slider experiments. It was found that the nanotextures produced by femtosecond laser processing are very effective for next-generation contact sliders and the optimum RMS heights of the nanotextures can be obtained. These advancements will facilitate the development of contact HDI with lower friction, lower wear of the contact slider surfaces, smaller change in the lubricant film thickness and lower contact slider bouncing vibration.
Starting Page	143
Ending Page	149
Page Count	7
File Format	PDF
ISSN	10238883
Journal	Tribology Letters
Volume Number	24
Issue Number	2
e-ISSN	15732711
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2006-10-18
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	contact slider femtosecond laser head-disk interface nanotextures nanotribology Nanotechnology Physical Chemistry Theoretical and Applied Mechanics Surfaces and Interfaces, Thin Films Tribology, Corrosion and Coatings
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Mechanics of Materials Mechanical Engineering Surfaces and Interfaces

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