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Molecular beam epitaxy of II–VI wide bandgap semiconductors II-VI型宽禁带半导体的分子束外延
Philips Journal of Research
Pub Date : 1995-01-01 DOI: 10.1016/0165-5817(95)98699-X
J.M. Gaines

The paper presents the issues and challenges for molecular beam epitaxy (MBE) of the II–VI wide-bandgap semiconductors used for blue/green lasers. Use of reflection high-energy electron diffraction (RHEED) addresses many of these challenges, permitting characterization and control of various aspects of wide-bandgap II–VI MBE growth. The paper describes their use to control composition of Zn1 − xMgxSe and ZnSySe1 − y, layers, and to measure and control the growth rates of ZnSe, ZnTe and CdSe during migration-enhanced epitaxy (MEE) growth. RHEED oscillations reveal additional information about growth processes during II–VI MBE. The Mg sticking coefficient is found to be independent of substrate temperature, flux ratios, and electron beam excitation. Re-evaporation of Se, but not of Zn, is found to occur during pauses in growth. The effects of an electron beam on growth may be quantitatively determined.

本文介绍了用于蓝/绿激光器的II-VI宽禁带半导体的分子束外延(MBE)的问题和挑战。使用反射高能电子衍射(RHEED)解决了许多这些挑战，允许表征和控制宽带隙II-VI MBE生长的各个方面。本文描述了它们用于控制Zn1 - xMgxSe和ZnSySe1 - y层的组成，以及在迁移增强外延(MEE)生长过程中测量和控制ZnSe, ZnTe和CdSe的生长速率。RHEED振荡揭示了II-VI MBE期间生长过程的附加信息。发现Mg粘著系数与衬底温度、通量比和电子束激发无关。硒的再蒸发，而不是锌的再蒸发，被发现发生在生长暂停期间。电子束对生长的影响可以定量地确定。
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引用次数: 7
A statistical approach to multilingual phonetic transcription 多语种语音转录的统计方法
Philips Journal of Research
Pub Date : 1995-01-01 DOI: 10.1016/0165-5817(96)81586-5
Stefan Besling

In this paper we present a statistical method for generating phonetic transcriptions from written words. It uses Bayes' decision rule to find the most likely phonetic transcription. The method is illustrated by applying it to English, French and German. For these three languages it produces transcriptions that differ from the correct ones in at most two phonemes for more than 97% of all words. An advantage of the statistical approach lies in the fact that phonotactical knowledge is automatically learned from background lexica and does not have to be explicitly coded. Thus, the system is basically language independent.

在本文中，我们提出了一种统计方法，从书面文字产生语音转录。它使用贝叶斯决策规则来寻找最可能的音标。以英语、法语和德语为例说明了该方法的有效性。对于这三种语言，超过97%的单词，它产生的转录结果与正确的转录结果最多有两个音素不同。统计方法的一个优点在于语音策略知识是自动从背景词典中学习的，不需要明确编码。因此，该系统基本上是语言独立的。
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引用次数: 4
Direct bonding: From an optical technology to a broad research topic 直接键合:从一种光学技术到一个广泛的研究课题
Philips Journal of Research
Pub Date : 1995-01-01 DOI: 10.1016/0165-5817(95)82000-0
U.K.P. Biermann, A.A. van Gorkum, J.A. Pals

For more than thirty years Philips Research has been engaged in direct bonding. A survey is given of how what was first the study of an optical technology gradually changed into the development of special applications in semiconductor technology. Cooperation between workshops with mastered dedicated technologies and research groups with incentives is shown to be indispensable for success. The principles and diversity of direct bonding are briefly described, after which an impression is given of its stimulating impact on Philips' research programme.

三十多年来，飞利浦研究一直致力于直接键合。本文回顾了最初对光学技术的研究如何逐渐转变为半导体技术中特殊应用的发展。已掌握专门技术的讲习班与有奖励办法的研究小组之间的合作是取得成功的必要条件。简要描述了直接键合的原理和多样性，之后给出了其对飞利浦研究计划的刺激影响的印象。
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引用次数: 10
Digital signal processing and LSI in modems for data transmission 用于数据传输的调制解调器中的数字信号处理和LSI
Philips Journal of Research
Pub Date : 1978-01-01 DOI: 10.1016/0026-2714(79)90497-9
L. Zegers, N. A. M. Verhoeckx
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引用次数: 6
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