Collaborative Research: Head-Disk Interface for Hard-Disk Drive Areal Data Density of 1 Terabit per Square Inch

Andreas A. Polycarpou (UIUC), David B. Bogy (UCB), Frank E. Talke （UCSD）在磁记录硬盘驱动器中，被称为磁头的读写换能器必须与携带磁性介质的旋转磁盘非常紧密地分离，以实现极高的面数据密度。现代最先进的硬盘驱动器能够存储每平方英寸80gbit （1gbit等于800亿位），预计每平方英寸1gbit（万亿）的磁间距将为5-6纳米。如此高面密度的磁记录的成功取决于低飞行和伪接触磁头磁盘接口的成功设计和实现。出于可靠性的考虑，这种界面还需要碳涂层和润滑剂的保护层，因此物理间距或飞行高度将只有几纳米。在这种超低飞行高度的情况下，磁头-磁盘接口的机械完整性和稳定性是一个主要问题，因为高速磁头-磁盘接触和飞行高度调制是不可避免的。最近的实验和模拟结果支持了在超低空飞行的hdi中存在吸引附着力，以及在飞行高度仅为几纳米时出现头盘界面不稳定的可能性。在这项合作研究中，研究者和他的同事将与信息存储产业联盟及其工业伙伴合作，进行系统的研究，调查磁头-磁盘接口的不稳定性，开发模型来预测它，基于这些模型设计磁头-磁盘接口，然后制造和测试它们。这项研究的影响将是推进与磁存储硬盘驱动器相关的最先进的纳米技术，并使极高的tb容量记录密度成为可能。这将通过专门设计、制造和测试磁头来实现，磁头将在只有几纳米距离的磁盘上飞行。将直接受益的具体技术部门是磁存储行业和其他严重依赖高面密度数据记录的公司，如信息技术、民用基础设施等。这项研究的广泛影响将通过综合研究和教育计划来完成。该研究计划将推进纳米技术和纳米摩擦力学、动力学和摩擦的知识，而教育计划将在研究小组之外和大学之外传播这些知识。

Collaborative Research: Head-Disk Interface for Hard-Disk Drive Areal Data Density of 1 Terabit per Square Inch Andreas A. Polycarpou (UIUC), David B. Bogy (UCB), Frank E. Talke (UCSD)In magnetic recording hard-disk drives the read/write transducer known as head must be very closely separated from the rotating disk that carries the magnetic media in order to achieve extremely high areal data densities. Modern state-of-the art hard-disk drives are capable of storing 80 Gbits per square inch (1 Gbit is 80 billions bits) and it is projected that the magnetic spacing for 1 Tbit (trillion) per square inch will be 5-6 nanometers. The success of magnetic recording to such high areal densities depends on the successful design and implementation of low flying and pseudo-contacting head-disk interfaces. For reliability reasons, such interfaces will also require protective layers of carbon overcoat and lubricant, thus the physical spacing or flying-height will be of the order of only few nanometers. In such ultra-low flying-height regimes, the mechanical integrity and stability of the head-disk interface is a main concern, since high-speed head-disk contact and flying-height modulations are unavoidable. Recent experimental and simulation results support the presence of attractive adhesive forces in ultra-low flying HDIs and the possibility of head-disk interface instabilities occurring when the flying-height is only few nanometers. In this collaborative research the investigator and his colleagues will undertake a systematic study to investigate the head-disk interface instability, develop models to predict it, design head-disk interfaces based on these models, and fabricate then and test them, in collaboration with the Information Storage Industry Consortium and its industrial partners.The impact of this research will be to advance the state-of-the-art of nanotechnology related to magnetic storage hard-disk drives and to enable extremely high recording densities of Tbytes capacities. This will be accomplished by specifically designing, building and testing magnetic heads that will fly over a magnetic disk at only few nanometers distance. Specific technological sectors that will directly benefit are magnetic storage industries and other companies that heavily rely on high areal density data recordings such as information technology, civil infrastructure and others. The broader impacts of this research will be accomplished via integrated research and education programs. The research plan will advance the knowledge of nanotechnology and nanotribomechanics, dynamics and friction, while the education plan will disseminate it outside the research groups and beyond the Universities.