GOALI: Development of a High Precision Curvature Modification Technique

该项目的目标是开发一种基于激光的技术，以精确地调整计算机硬盘驱动器组件的曲率，并对所涉及的物理现象有基本的了解。该项目将由普渡大学和IBM联合进行。 高容量计算机硬盘驱动器组件的制造需要精度优于10-4度的曲率控制。 目前，还没有技术可以达到如此高的精度。 即将开发的基于激光的技术将利用脉冲激光加热硬盘驱动器组件并使其产生局部变形。 因为只有很小的区域被加热和变形，曲率被每个激光脉冲精确地改变。 初步研究表明，这种技术是可行的。将进行基础研究，以了解激光曲率修改过程，并定量地将处理参数与所产生的曲率变化联系起来。 将在制造过程中开发并实施激光曲率调整过程。 基础研究的结果将作为生产工艺的指导原则。这项研究的成功将有助于大容量计算机硬盘的发展，并将有助于美国的发展。S.公司保持在硬盘驱动器制造的领先地位。 该项目还将为一些研究生和本科生提供研究机会。 此外，大量的学生将通过参加新的双研究生/本科生水平的激光加工课程接受这种先进的激光技术的教育。 因此，该项目将有助于激光制造技术领域的人力资源开发。

The objective of this Grant Opportunity for Academic Liaison with Industry (GOALI) project is to develop a laser-based technique to adjust curvatures of computer hard drive components precisely, and to develop a fundamental understanding of the physical phenomena involved. This project will be conducted jointly by Purdue University and IBM. Manufacturing of components of high capacity computer hard drives requires curvature control with precision better than 10-4 degrees. Currently, there is no technique available to achieve such high precision. The laser-based technique to be developed will utilize a pulsed laser to heat and produce localized deformation on hard drive components. Because only a very small area is heated and deformed, the curvature is altered precisely by each laser pulse. Preliminary studies conducted have demonstrated the feasibility of this technique. Fundamental studies will be conducted to understand the laser curvature modification process and to quantitatively relate the processing parameters to the resulted curvature change. A laser curvature adjustment process will be developed and implemented in manufacturing. Results of the fundamental studies will serve as guidelines for the manufacturing process. The success of the research will be instrumental to the development of high capacity computer hard drives, and will help the U. S. companies to maintain the leading position in hard drive manufacturing. This project will also provide research opportunities to several graduate and undergraduate students. In addition, a large number of students will be educated with this advanced laser technology through taking a new dual graduate/undergraduate level course on laser processing. Tberefore, this project will contribute to the human resource development in the area of laser-based manufacturing technology.