7.2 Film properties

In practice, we can hardly ever use just the fastest technique to put some material down onto the wafer. Before deciding how to deposit a particular layer, we must consider which film properties are important for the function of the device. The commonest requirements relate to uniformity, step coverage, composition, micro structure and stress. We shall consider each of these in detail.


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5.1.1 London forces

The distribution of charge in one atom or molecule occurs naturally as the electrons move around the nucleus. If a second atom or molecule is introduced, the charge distribution from the first will induce a complementary charge distribution in the second. Looking at Figure 22 you can see that the negative bias o
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3.5.2 Non-contact (tapping) mode

If the probe is taken further away from the sample, into the region beyond the maximum on the force-separation curve of Figure 7, it can be operated in non-contact mode. Typically, the separation required is of the order of 10 nm. The attractive force is much smaller than the repulsive force of the contact mode,
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3.2 The principles of scanning probe microscopes

Scanning probe microscopy is a term that is applied to a set of imaging methods based on a common element: a fine stylus. In many ways, what scanning probe microscopes do is similar to what a gramophone does. A gramophone stylus scans a spiral groove (by travelling along it) on which information has been encoded in the form of undulations in the groove wall. Side-to-side and up-and-down movements of the stylus (which is mounted on one end of a rod supported and pivoted at its centre) as it fo
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3.1 Introduction

I've an opera here you shan't escape – on miles and miles of recording tape.

Flanders, M. and Swann, D. (1977) ‘The Song of Reproduction’ from The Songs of Michael Flanders and Donald Swann, London, Elm Tree Books and St George's Press, p. 99

Sounds, pictures, measurement data, financial statistics, personal details, etc. can all be recorded and stored on magnetic media, i.e. m
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4 Introduction

(Please refer to Reading 4: Learning to act: managing and systems practice, by Andy Lane) This unit teaches some aspects of systems thinking and practice. But what does it mean to be a systems practitioner, and is it different to being a manager? This reading attempts to answer those questions.

First, I believe a good systems practitioner will be more competent at handling complex situations, more capable of managing their working and domestic lives, and more able to learn not only how
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7.1 Some basic principles of religious studies

Remember that in Section 4 I suggested that possible reasons for studying religion could be clustered together under two broad headings:

  1. to understand the society in which we live, the culture we inherit and the wider world of which we are a part;

  2. as part of a personal quest for religious
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6.1 Introduction

Whatever else they may be, religions grow in historical and social settings. The present form of a religion has its roots in the past. Religion can exercise a strong influence upon society and the cultural forms of a society, but religion itself is no less affected by changes and pressures within society. Religion gives meaning to a pattern of living and may even be responsible for establishing a certain lifestyle or distinctive social organisation or institution. At the same time, religion o
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5.3 Scholarly definitions of religion

Scholars offer us many different definitions of religion, but these definitions tend to be of two types. The first type is known as a substantive definition: that is, a definition that tells us what kind of thing religion is by pointing to its distinguishing characteristic – usually its beliefs and/or practices. We can find an example of a substantive definition of religion in my summary of the definitions found in the Concise Oxford Dictionary. Think again about d. Acc
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5.2 The ‘answer’ in your dictionary

Exercise 9

Please now look at the definition of ‘religion’ given in your dictionary.

  1. Do you think that the definition is going to help you when deciding what is or is not religion? Please give
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5.1 ‘Religion’ and ‘the religions’: two new notions

I want to begin our closer discussion of the question ‘what is religion?’ by looking briefly at the history of the use and meaning of the term. You may be surprised to find how recently the word ‘religion’ has taken on the meanings attached to it today.

Contemporary scholars of religion emphasise not merely the cultural breadth but also the antiquity of religious activity. Yet, the term ‘religion’ as we understand it today is very much a Western concept.

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Learning outcomes

By the end of this unit you should have:

  • a perception of the enormity of the events under discussion;

  • a recognition of the kinds of ideas and incidents which may have prompted them;

  • an awareness of the historical arguments surrounding the Holocaust;

  • an awareness of the relationship between the Holocaust and the war.


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Introduction

This unit provides an overview of John Napier and his work on logarithms. It discusses his approach to this lasting invention and looks at the key players who worked with him, including Briggs, Wright and Kepler.

This unit is from our archive and is an adapted extract from Topics in the history of mathematics (MA290) which is no longer taught by The Open University. If you want to study formally with us, you may wish to explore other courses we offer in
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4 Conclusion

The biographical monograph is probably one of the best ways of writing appealing and accessible art history. Helen Langdon's Caravaggio is an attractive and well-written narrative of the life and work of an important and allegedly infamous artist. We learn about a set of artworks in a particular context and at the same time get to know a ‘new friend’ whose personality and environment seem to speak through the illustrations. The biographical structure is also a convenient way of con
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2.2 Twelve conceptions of imagination

Can we say anything more systematic about the different ways in which we talk of imagination? In a paper entitled ‘Twelve conceptions of imagination’ (2003), Leslie Stevenson distinguishes the following meanings of imagination, which I list here (in italics) as he formulates them, together with my own examples to illustrate each one:

  1. The ability to think of something that is not presently perceived, but is, was or will be spatio-temporally real<
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2 The varieties of imaginative experience

What would life be like without imagination? Perhaps, in this very first question, we have found something that is impossible to imagine. Imagination infuses so much of what we do, and so deeply, that to imagine its absence is to imagine not being human. Some people, I am told, think about sex every five minutes. For them, I presume, a sudden loss of imaginative powers would be devastating. Some people (not necessarily the same ones), at certain points in their lives, think about getting marr
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2.8 The Gricean Programme

Before considering any further potential criticisms of Grice's position, let us step back and consider his wider importance to philosophy: his contribution to what is often called The Gricean Programme. Grice himself was not really a Gricean in this sense, since he was not committed to all elements of the programme that bears his name. But Grice's influence has been as great as it has in part because of the way in which his ideas have been co-opted into this broader programme.

Th
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2.4 The meaning of expressions versus the meaning of individual utterances

I drew a contrast at the beginning of the chapter between those approaches to the meaning of utterances that look to the meaning of the words used, and those approaches that look instead to the content of the mental or psychological states of speakers. Grice belongs to the second camp. He aims to show that the meaning of an expression (e.g. a word or a sentence) is derivative, definable in terms of how that expression is typically used in meaningful utterances. The meaning of individual utter
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1.6 Further reading

For an advanced general introduction to the philosophy of language, see Blackburn 1984. Lycan 1996 is pitched at a more accessible level. Pinker 1994 is an informal but informative discussion of the hypothesis that much of our linguistic ability is innate, an important topic that has had to be left out of this unit.


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6 Hospital care

In most aspects of medical care, the rich generally enjoyed better access to medical services and better-quality services than the poor. The only exception to this rule was hospital care. In the nineteenth century the ‘deserving’ poor – whose respectability was guaranteed by the need for them to have a letter of admission from a subscriber or employer – could receive medical and surgical treatment in charitable hospitals. The very poor could obtain care through Poor Law hospitals, whi
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