Vapor Phase Lubrication of Magnetic Data Storage Media

[9900647] gellman这个项目将探索一些与磁性数据存储介质润滑新方法相关的基本科学问题。目前的硬盘介质是用超薄的全氟聚烷基醚（PFPEs）薄膜润滑的，这种薄膜是通过将硬盘浸入PFPE溶液中涂在硬盘表面的。由于需要高面数据存储密度，因此越来越需要改进和更高度控制的磁盘表面润滑方法。气相润滑将在用于沉积在磁盘表面使用的薄膜涂层的相同环境下在真空下施加润滑剂。这代表了对当前技术的明显改进，但也带来了许多新的问题和问题。氟醚、氟化醇和pfpe的表面化学性质将在从未暴露于空气的新溅射、无定形氢化碳膜（a-CHx）表面进行研究。这模拟了Intevac公司正在开发的过程中使用的条件，该公司在GOALI计划下参与了该项目。这项工作将确定在新鲜的a-CHx薄膜上PFPEs功能单元（醚键和羟基端基）的键合性质。此外，还将采用在真空条件下沉积高分子量pfpe的方法。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PFPE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.***