CAREER: Magnetic Force Microscopy of Electronic Circuits and Devices

9733502 Ram电子去了哪里？他们从源头出现，然后潜入排水沟。 它们在漏极和源极之间的路径是从导电地形的详细知识中推断出来的。 操纵电子的路径是100多年来电气工程的目标。 目前还没有一种实用的技术来跟踪电子在小电路或小装置中的运动轨迹。 这个职业计划是开发一种非侵入性的电流探头，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的感应磁场梯度的能力，在距离小至10压力，可用于感应周围的杂散磁场移动electron. The潜力，空间分辨设备内的电流以前没有提供，因为有限的（0.3至10吉姆）的其他场衬显微镜的分辨率。 与互连线相关联的磁场及其相关联的电感的直接测量可以提供对新电路拓扑的洞察。 对电子流内部结构的前所未有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，而以前的源极和漏极电流的外部测量只能推断它们的存在。 看到一个电子的路径涉及到以一种视觉上吸引人和有意义的方式表示@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。 这一接口可以成为青年科学家教育的一个富有成效的竞技场。 基于主要研究者以前与艺术和科学学生在有效的科学可视化方面的合作经验，本提案为小学和大学生开发了一个课程。 ***

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. ***