Manufacturing of Electronic Materials at High Gravity

这个研究项目的目标是开发离心机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冻结技术在热稳定配置（向上冻结）中定向凝固。当前的界面划分将用于揭示固液界面形状和冻结速率与分数固化的关系。确定了旋转速率对界面形状、晶粒和孪晶形成和选择的影响。将构建一个仪器细胞来模拟梯度冷冻生长安瓿。电池底部将有一个金属冷却板，其表面是弯曲的，以模拟固液界面。悬浮粒子的条纹照片将在狭缝照明下拍摄。热场将被确定使用实时全息干涉测量。该计划的主要目标是对电子材料在高重力下的体晶生长有一个基本的了解，并将这种理解应用到电子材料的制造中，以实现微观结构和均匀性的改进。该计划的一个重要特点是培养学生在材料研究的一个基本的和技术上重要的领域。这项研究将有助于提高先进的电子和光子器件以及用于计算、信息处理和远程通信的集成电路的总体性能。* * *

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. ***