Manufacturing of Electronic Materials at High Gravity

9414304 RECEL这项研究项目的目标是开发离心法，将其作为制造改进的电子材料的工具。其目的是提高对离心机中定向凝固的理解。掺锌的锑化铟将在离心机中采用梯度冻结技术在热稳定构型(向上冻结)中定向凝固。采用电流界面对固液界面形状和冻结速率随凝固分数的变化规律进行了研究。将确定转速对界面形状、孪晶和孪晶的形成和选择的影响。将构建一个仪表化的池来模拟梯度冷冻生长安瓶。电池底部将有一个金属冷却板，带有一个曲面，以模拟固液界面。悬浮颗粒的条纹照片将在狭缝照明下拍摄。将使用实时全息干涉计量术来确定热场。%本课程的主要目标是对电子材料在超重力条件下的块状晶体生长有一个基本的了解，并将其应用到电子材料的制造中，以实现微结构和均匀性的改善。该项目的一个重要特点是在材料研究的基础和技术领域对学生进行培训。这项研究将有助于提高用于计算、信息处理和远程通信的先进电子和光子器件以及集成电路的综合性能。***

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. ***