50 Years in the Semiconductor Underground by David K. Ferry

By David K. Ferry

This booklet used to be derived from a conversation the writer gave on the overseas convention on complicated Nanodevices and Nanotechnology in Hawaii. The e-book provides the author's own perspectives approximately technology, engineering, and lifestyles, illustrated by way of a couple of tales approximately quite a few occasions, a few of that have formed the author's existence.

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This booklet was once derived from a conversation the writer gave on the overseas convention on complicated Nanodevices and Nanotechnology in Hawaii. The publication provides the author's own perspectives approximately technological know-how, engineering, and existence, illustrated by means of a couple of tales approximately a variety of occasions, a few of that have formed the author's existence.

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Was in the 25–30 nm range. This would make them the smallest transistors in the world at that time. While we succeeded, there was intense competition from the French and the Japanese, so it was difficult to tell whose devices were smaller on any given day. We succeeded in measuring the microwave performance of these transistors, and found that we could achieve a cutoff frequency as high as 167 GHz. The cutoff frequency is that frequency at which the gain of the transistor is reduced to unity. We know now that these devices suffered from source and drain contact resistances that were far too high.

However, working with colleagues from Vienna, and using very fast pulse techniques, we found that the process leading to pair formation was a very slow process, while the process that led to intervalley transfer was a fast process. Thus, if we looked on the nanosecond time scale, we could push electrons to electric fields above 600 V/cm before they could begin to produce the electron–hole pairs. Indeed, intervalley transfer could be seen to occur just above 600 V/cm. Hence, on the short time scale, or in very small devices, the Gunn effect could occur after all.

This subsequently led to the voltmeter being destroyed by too much voltage, so that now there was no way to know when too much voltage was being used. Well, time passed, and someone decided to give the system another try, and apparently the corporate memory of the various failures of some parts had disappeared. So, the bull was connected to the equipment and the technician gave the knob some vigorous turns, trying to get the voltmeter to read. This of course provided enormous stimulation to the bull, who it is said performed in an incredible manner, going out in a blaze of glory.

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