Development of nano-meter head-disk interface for the Tb/in^2 class ultrahigh-recording-density information storage systems

Tb/in^2级超高记录密度信息存储系统纳米头盘接口开发

基本信息

批准号：
15206019
负责人：
TAGAWA Norio
金额：
$ 26.04万
依托单位：
Kansai University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15206019/
关键词：
ultra-high density data storage hard disk drives head-disk interface nanotribology ultra-thin liquid lubricant films PFPE lubricant films contact sliders femtosecond laser processing PFPE潤滑剤スライダヒステリシス挙動環境ナノテクスチャー PFPE系潤滑剤

项目摘要

In order to achieve more than 1Tb/in2 area recording density, it is necessary to develop nano-meter head disk interface (HDI) less than 10 nm. The goal of this research is to make clear the design guideline of next generation nano-meter spacing HDI. In addition, we studied the peculiar behavior of ultra-thin liquid lubricant films for contact sliders and developed the breakthrough technologies such as nanotextures fabricated by femtosecond laser processing on the air bearing slider surfaces to realize future contact recording. The obtained results are summarized as follows;(1)The spreading characteristics of novel alkanolamine-terminated perfluoropolyether (PFPE) films as well as conventional lubricant films on carbon surfaces were investigated and evaluated experimentally by using a scanning micro-ellipsometer. The apparent diffusion coefficients of the novel lubricants were also studied and they were compared with the conventional lubricants. As a result, the effects of end-groups on … More the spreading characteristics of molecularly thin liquid lubricant films were clarified.(2)The effects of molecularly thin liquid lubricant films on slider hysteresis behavior were investigated experimentally. In other words, the difference in the touchdown and takeoff velocities was monitored by varying the lubricant bonded ration and lubricant film thickness of the disks. As a result, it was suggested that the variation in the touchdown velocity is due to a variation in the intermolecular forces and that the variation in the takeoff velocity is caused by a variation in the friction forces between the slider and disk surface. In addition, the next generation design guideline was clarified for ultra-low spacing of less than 2-3 nm.(3)The effects of ultra-thin liquid lubricant films on contact slider dynamics were investigated, using three types of lubricant, which have different end-groups and molecular weight as a function of lubricant film thickness. As a result, it was found that the lubricant film thickness instability occurs as a result of slider-disk contacts, when the lubricant film thickness is thicker than one monolayer. In addition, it is concluded that the lubricant film thickness should be designed to be one monolayer thickness region.(4)A novel contact slider was proposed and developed. This has nanotextures fabricated by femtosecond laser processing. Contact experiments were also carried out using the fabricated sliders. The feasibility of the developed contact slider technology was confirmed for next-generation HDI design. Less

为了实现超过1Tb/in2的面积记录密度，需要开发小于10纳米的纳米磁头磁盘接口（HDI），这项研究的目标是明确下一代纳米的设计指南。此外，我们研究了接触滑块超薄液体润滑膜的特殊行为，并开发了突破性技术，例如通过飞秒激光加工在空气轴承滑块表面制造纳米纹理，以实现未来的接触。所得结果总结如下：(1)利用扫描微椭圆仪对新型链烷醇胺封端的全氟聚醚(PFPE)薄膜以及传统润滑剂薄膜在碳表面的铺展特性进行了实验研究和评估。还对新型润滑剂进行了研究，并将其与传统润滑剂进行了比较，结果是端基对稀分子液体的铺展特性的影响。 (2)通过实验研究了分子薄液体润滑膜对滑块滞后行为的影响。换句话说，通过改变润滑剂结合比和润滑膜厚度来监测着陆和起飞速度的差异。结果表明，着陆速度的变化是由分子间力的变化引起的，起飞速度的变化是由分子间力的变化引起的。此外，还阐明了小于2-3 nm的超低间距的下一代设计指南。(3)超薄液体润滑膜对接触滑块的影响。使用三种具有不同端基和分子量的润滑剂对动力学进行了研究，结果发现润滑剂膜厚度不稳定。此外，还得出结论，润滑膜厚度应设计为一个单层厚度区域。(4)提出并开发了一种新型接触滑块。还使用所制造的滑块进行了飞秒激光加工制造的纳米纹理，证实了所开发的接触滑块技术对于下一代 HDI 设计的可行性。