An Integrated Head for Optically Assisted (Hybrid) Magnetic Recording

提案编号：摘要ECS-0115836混合记录是一种新的记录模式，旨在克服现有磁和光记录技术的基本物理限制。杂交将热辅助磁写和巨磁电阻读回相结合，以绕过磁和光记录的物理限制。这种方法打破了磁记录系统中比特大小、写入它所需的磁场和信息稳定的时间长度之间的耦合。因此，小于10 nm的介质中的磁性颗粒可以稳定下来，这对于达到1太比特/英寸2或更高的密度来说是一个关键的进步。然而，只有在证明了一种合理的磁头设计将磁写极与局部热能源(可能是光学)相结合的情况下，这些进步才是可能的。这项技术追求的一个基本洞察力是如何施加磁场和热，以及如何从磁盘的单面使用单个封装设备执行MR回读。本项目的目标是设计、制作和测试适用于这一应用的设备。将被研究的具体的新设备将包括二维模式折射率透镜和近场光学天线结构。卡内基梅隆大学(CMU)的数据存储系统中心(DSSC)和Goali的合作伙伴Seagate Technology在设计和实施新的头部设计方面拥有丰富的经验。在头部制造方面的合作将包括与Seagateresearcher的合作设计计划、接合晶片制造以及现有头部的制造后修改。预计这一学术-产业合作的结果将是一种可行的混合记录磁头集成设计的展示，这将消除这项技术进步和最终商业化的一个重要障碍。

ABSTRACT for Proposal No. ECS-0115836Hybrid recording is a new recording paradigm that seeks to overcomefundamental physical limits of existing magnetic and optical recordingtechnologies. Hybridization combines thermally assisted magnetic writingwith giant magnetoresistive readback, to circumvent the physical limitsof both magnetic and optical recording. This approach breaks thecoupling seen in magnetic recording systems among the size of a bit, thefield required to write it and the length of time for which theinformation is stable. Thus, magnetic grains in the medium smaller than10 nm can be stabilized, which is a critical advance for reachingdensities of 1 terabit/in2 and beyond. These advances will only bepossible, however, if a plausible head design is demonstrated thatintegrates magnetic write poles with a localized source (probablyoptical) of thermal energy. An essential insight being pursued for thistechnology is how to apply magnetic write fields and heat, as well asperform MR readback with a single packaged device from a single side ofthe disk. It is the goal of this project to design, prototype, and testdevices suitable for this application. Specific novel devices that willbe investigated will include two-dimensional mode-index lenses, andnear-field optical antenna structures. The Data Storage Systems Center(DSSC) at Carnegie Mellon University (CMU) and GOALI collaborator,Seagate Technology, has extensive experience in the design andimplementation of new head designs. The collaboration on headfabrication will include a program of co-design with Seagateresearchers, joint wafer fabrication, and post-fabrication modificationof existing heads. It is anticipated that the result of thisacademic-industrial collaboration will be a demonstration of a plausibleintegrated head design for hybrid recording, which will remove animportant barrier to the advancement and eventual commercialization ofthis technology.