CAREER: Magnetic Force Microscopy of Electronic Circuits and Devices

9733502拉姆电子去了哪里？它们从源头浮出水面，向排水沟潜水。它们在漏极和源极之间的路径是从对导电地形的详细了解中推断出来的。100多年来，操纵电子的路径一直是电气工程的目标。目前，还没有一种实用的技术来跟踪电子通过小电路或设备的行程。这项职业计划是开发一种非侵入性电流探头，能够监测电子设备和电路中的电流分布。磁力显微镜(MFM)可以提供介观器件内部电流路径的高分辨率图像。MFM能够在小到10个压力计的距离内感应磁场梯度，可以用来感应运动电子周围的杂散场。由于其他场对比显微镜的分辨率有限(0.3到10吉姆)，设备内部电流的空间分辨能力以前是不可用的。直接测量与互连线及其关联电感相关联的磁场可提供对新电路拓扑的洞察。对电子流内部结构的史无前例的观察将使我们能够观察到理论上预测的结构，如电流涡旋和电子冲击波。电流分布的详细图像将揭示这种结构，而以前对源极和漏极电流的外部测量只能推断它们的存在。看到电子的路径需要以一种视觉上吸引人的和有意义的方式来表示@数据。这种无形的物理量的图形表示将物理学和美学结合在一起。对于年轻科学家的教育来说，这一界面可以成为一个富有成效的舞台。基于首席调查员以前与艺术和理科学生在有效的科学可视化方面合作的经验，这项建议为中小学生和大学生开发了一门课程。***

9733502 Ram Where do electrons go ? They emerge from the source and dive toward the drain. Their path between drain and source is inferred from a detailed knowledge of the conductive terrain. Manipulating the electron's path has been the goal of electrical engineering for over 100 years. At the present time there is no practical technique for tracking the electron's journey through small circuits or devices. This career plan is to develop a noninvasive current probe that is capable of monitoring the current distribution in electronic devices and circuits. Magnetic force microscopy (MFM) can provide highly resolved images of the current path inside mesoscopic devices. MFM's ability to sense magnetic field gradients over distances as small as 10 manometers can be used to sense the stray field surrounding a moving electron. The potential for spatially resolving currents inside devices has not previously been available because of the limited (0.3 to 10 Jim) resolution of other field contrast microscopies. Direct measurements of magnetic fields associated with interconnect lines and their associated inductances may provide insight into new circuit topologies. An unprecedented look at the internal structure of the electron flow will enable the observation of theoretically predicted structures such as current vortices and electron shock waves. Detailed images of current distributions would reveal such structures whereas previous external measurements of source and drain currents.could only infer their existence. Seeing an electron's path involves representing the @ data in a visually engaging and meaningful way. The graphical representation of such intangible, yet physical quantities brings together physics and aesthetics. This interface can be a fruitful arena for the education of young scientists. Building on the principal investigator's previous experience working together with art and science students on effective scientific visualization, this proposal develops a curriculum for elementary school and college students. ***