Vapor Phase Lubrication of Magnetic Data Storage Media

9900647盖尔曼本项目将探索与磁性数据存储介质润滑的新方法相关的一些基本科学问题。目前，硬盘介质是用全氟聚烷基醚(PFPE)的超薄膜润滑的，通过将磁盘浸入PFPE的溶液中将其施加到表面上。由于需要较高的区域数据存储密度，因此对磁盘表面润滑的改进和更高控制方法的需求越来越大。气相润滑将在真空下施加润滑剂，环境与在磁盘表面沉积薄膜涂层所用的环境相同。这代表着对当前技术的明显改进，但也带来了一系列新的问题和问题。氟醚、氟化醇和PFPE的表面化学将在从未暴露在空气中的新鲜溅射的无定形氢化碳膜(a-CHX)上进行研究。这模仿了Intevac公司正在开发的一种工艺中使用的条件，Intevac公司正在GALI计划下就该项目进行合作。这项工作将确定新鲜的a-CHX薄膜上PFPE的功能单元(醚键和羟基端基)的成键性质。此外，还将使用真空条件下的方法来沉积高相对分子质量的PFPE。这些PFPE的表面化学、解吸速率和分解机制将与沉积在部分氧化的a-CHX膜上的PFPE膜进行比较，例如目前用于保护硬盘表面的那些膜。*

9900647GellmanThis project will explore some of the fundamental scientific issues associated with a new method for lubrication of magnetic data storage media. Currently hard disk media are lubricated with ultra-thin films of perfluoropolyalkylethers (PFPEs) which are applied to the surface by dipping the disk into a solution of the PFPE. As high areal data storage densities are required there is an increasing need for improved and more highly controlled methods of disk surface lubrication. Vapor phase lubrication will apply the lubricant under vacuum in the same environment that is used to deposit the thin film coating used on the disk surface. This represents a clear improvement over current technology but opens up a host of new problems and issues.The surface chemistry of fluoroethers, fluorinated alcohols, and PFPEs will be studied on the surfaces of freshly sputtered, amorphous hydrogenated carbon films (a-CHx) that have never been exposed to air. This emulates the conditions being used in a process being developed at Intevac, Inc., which is collaborating on the project under the GOALI program. The work will determine the nature of bonding of the functional units of PFPEs (ether linkages and hydroxyl endgroups) on fresh a-CHx films. In addition methods will be used to deposit high molecular weight PFPEs under vacuum conditions. The surface chemistry, desorption rates, and decomposition mechanisms of these PFPEs will be compared to those of PFPE films deposited onto partially oxidized a-CHx films such as those currently used to protect hard disk surfaces.***