STTR PHASE I: A Fiber-Optic Probe for In-Situ Measurement of Thin Film Deposition

STTR PHASE I：用于薄膜沉积原位测量的光纤探头

• 批准号: 9632155
• 负责人: Edward Johnson
• 金额: $ 10万
• 依托单位: ION OPTICS INC
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-01 至 1997-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9632155&HistoricalAwards=false
• 关键词: STTR; PHASE; Fiber; Optic; Probe

*** 9632155 Johnson This Phase I STTR project will combine laser and white light sources in a single diagnostic instrument compatible with high temperature processes, immune to electromagnetic noise (a byproduct of rf wafer heating), and free of the requirement for precise optical alignment. The basic concept of the fiber-optic monitor has been demonstrated I in rudimentary pulsed laser experiments on a silicon nitride reactor at Brown University; Ion Optics Inc. has successfully extracted real-time layer composition from white-light reflectance spectra. Phase I will extend this earlier work to a practical dual-source configuration that is fast and accurate enough to track thin-film growth at rates typical of advanced devices. The performance of virtually all modem opto-electronic devices depends critically upon the ability to grow multi-layered, thin-film structures whose composition and thickness is precisely controlled. In production-scale deposition processes, monitoring and adjustment cannot be done in real time. Ion Optics Inc. will overcome the problem with a dual-light-source, fiber-optic, thickness and composition monitor operating simultaneously as an interferometer (measuring growth rate) and as a reflectometer (measuring composition and total thickness). A major advantage of such an instrument is its ability to provide the data needed to make instantaneous composition changes during growth to compensate for the effects of diffusion. Diffusion is an important factor when very thin adjacent layers of dissimilar composition must be deposited at relatively high temperature, as is the case for multiple quantum well devices. This project will result in reasonably priced, easy to use thickness and composition monitors. Another version of these optoelectronic devices would compete with quartz deposition gauges. ***

* 9632155约翰逊 该一期STTR项目将在一台诊断仪器中结合联合收割机激光和白色光源，该仪器与高温工艺兼容，不受电磁噪声（射频晶片加热的副产品）影响，并且不需要精确的光学对准。光纤监测器的基本概念已经在布朗大学氮化硅反应堆上的基本脉冲激光实验中得到证实。已经成功地从白光反射光谱中提取了实时层成分。第一阶段将扩展这一早期的工作，以一个实际的双源配置，是快速和准确的，足以跟踪薄膜生长的速度典型的先进设备。几乎所有现代光电器件的性能都取决于生长多层薄膜结构的能力，这些结构的成分和厚度都得到精确控制。在生产规模的沉积工艺中，不能真实的实时地进行监测和调整。离子光学公司将克服双光源、光纤、厚度和成分监测器同时作为干涉仪（测量生长速率）和反射计（测量成分和总厚度）操作的问题。这种仪器的一个主要优点是它能够提供在生长过程中进行瞬时成分变化所需的数据，以补偿扩散的影响。当必须在相对高的温度下沉积非常薄的不同组成的相邻层时，扩散是一个重要因素，如多量子阱器件的情况。 该项目将导致合理的价格，易于使用的厚度和成分监测。这些光电器件的另一个版本将与石英沉积计竞争。 ***