Manufacturing of Electronic Materials at High Gravity

9414304 Regel该研究项目的目标是开发离心分离作为制造改进电子材料的工具。目的是提高对离心机定向凝固的认识。 锌掺杂的锑化铟将在离心机中使用梯度凝固技术以热稳定构型（向上凝固）定向凝固。目前的界面划分将被用来揭示固液界面形状和冻结速率与凝固分数。 确定了旋转速率对界面形状、晶粒和孪晶形成及选择的影响。 将构建仪器化细胞以模拟梯度冷冻生长试验。电池底部将有一个金属冷却板，该金属冷却板具有弯曲表面以模拟固液界面。采用狭缝照明拍摄悬浮颗粒的条纹照片。将使用真实的时间全息干涉测量法来确定热场。该计划的主要目标是发展在高重力下电子材料的大块晶体生长的基本理解，并将这种理解应用于电子材料的制造，以实现微观结构和均匀性的改善。 该计划的一个重要特点是在材料研究的基础和技术重要领域对学生进行培训。 这项研究将有助于提高先进的电子和光子器件和集成电路在计算，信息处理和电信的一般性能。 ***

9414304 Regel The goal of this research project is to develop centrifugation as a tool for manufacturing of improved electronic materials. The objective is to improve understanding of directional solidification in a centrifuge. Zinc doped indium antimonide will be directionally solidified in a centrifuge using the gradient freeze technique in the thermally stable configuration (freezing upward). Current interface demarcation will be used to reveal the solid liquid interface shape and freezing rate versus fraction solidified. The influence of rotation rate on interface shape, and on qrain and twin formation and selection will be determined. An instrumented cell will be constructed to simulate a gradient freeze growth ampoule. The cell will have a metal cooling plate on the bottom with a curved surface to simulate the solid liquid interface. Streak photographs of suspended particles will be taken with slit illumination. The thermal field will be determined using real time holographic interferometry. %%% The primary goal of this program is to develop a fundamental understanding of the bulk crystal growth of electronic materials at high gravity and to apply this understanding to the manufacture of electronic materials to achieve improvements in microstructure and homogeneity. An important feature of the program is the training of students in a fundamentally and technologically significant area of materials research. This research will contribute to improving the general perform ance of advanced electronic and photonic devices and integrated circuits used in computing, information processing, and tele communica tions. ***