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Posted on 20-10-2008

Semiconductors and Sensors from Russian Federation

Filed Under (Electronic Technologies) by admin

The special material for semi-conductors commonly has the resistance amid the resistance of a conductor and a non-conductor. Changes in temperature or the part of “impurities” also influence the electrical resistance.

The material is known to have impurities if some different components have been mixed to it. Semiconductors are marked as semiconductor assembly of type-n and type-t depending on the type of final mixture.

They make diodes and transistors applying both these kinds of semiconductors. These days silicon is apparently turning into the most popular substance for producing semiconductors.

In order to keep the process of electrical current in only one direction diodes are used. They are produced of semi-conductor material. There is a piece of + (positive) combination, - (negative) combination and pn-transfer appointed as barrier level in each diode. Electrical schemes which convert among alternating and direct electrical current are produced using diodes. Only part of the period or cycle is to go as diodes let current flow just in a single sense. Rectifier is the term for such a construction.

Concerning the light diodes that figure as LED, they are used to generate light at low voltages not generating heat. These diodes are applied in all units of contemporary electronic gadgets like TV sets or audio systems specially to mark the on state.

Moore's law led to the development of thyristors manufactures. What is the most significant point to manufacture complex power semi-conductor equipment at smaller cost? That's lithography. For optical lithography is today outdated, there's now a tendency for other techniques. Today ultraviolet lithography and nano-imprint lithography are known to be the most promising substitutes to optical method. Read the rest of this entry »

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Posted on 25-06-2008

What Does Term Quasi-conductor Mean and How Does It Work

Filed Under (Progress & Technology) by admin

Quasi-conductors are considered to be a special class of chemical elements. People got known about these materials in the end of the 19th century, but only in the 20th century scientists managed to get more knowledge about them. In 1923 Russian physicists proved the ability of utilizing of semiconductor-metal contacts to accelerate the producing of fluctuations. During further years igct were excluded by tubes. The most considerable event in the history of semiconductor devices was the invention of the first transistor by Bell corporation in 1949. The intense research of the characteristics of semiconductors was begun at the same time.

Many physicists carry out a great deal of researches just to gain more knowledge about such characteristic of semiconductors as stimulated radiation. It caused the appearing of semiconductor laser device based on usage of p - n barriers and then on heterojunction.

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