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Semiconductors are considered to be a unique kind of chemical elements. This type was discovered in early 1980’s but there were no needed technologies to perform the further experiments. The research of semiconductors was carried on only in the 1920’s. Russian physicists carried out lots of researches. The results showed that semiconductors can assist to generate the fluctuations and maintain them. There was no opportunity to create some sophisticated devices as igct. The most considerable event in the history of semiconductor devices was the creation of the first transistor by Bell corporation in 1949. That was the start of the epoch of semiconductor technologies. Induced emission is actually a quite interesting characteristic of semiconductors that has been researched for several tens of years. The first laser system was developed with usage of semiconductors. The first variant was based on p – n barriers, the latest ones – on heterojunction. Today we may see a huge amount of different pulsed power devices that work with help of usage of semiconductors. Semiconductor substances have been studying for not so long but radio electronics and lots of other sciences can’t do without utilizing of them. The conductivity of semiconductors lies in range between conductivity of metals and conductivity of isolators. That characteristic is caused the division of semiconductors as a detached type. Such matters as germanium, silicon, selenium and some others are believed to be semiconductors. For quite long period of time semiconductors haven’t got the attention of physicists and engineers. The first man who decided to get more knowledge about semiconductors was Abram Ioffe – Russian physicist. He found that this wonderful type of matter has some special characteristics and determined how they can be used. There are electron conduction and hole conduction provided by semiconductor devices. Such characteristics can be modified by means of adding some admixtures or modifying temperature. The admixtures influence considerably on the electron conduction of the semiconductors. The most important semiconductor devices which are utilized in technologies are diodes, transistors and thyristors which are founded on materials with electron and hole conductions. Their sophisticated features are widely used nowadays, but they became spread just ten years ago. There are devices based on semiconductors which can convert luminous and heat energy into electricity and vice versa. Heat and cold can be produced by some kinds of semiconductors. Semiconductor systems may be found in radio receiver and quantum generator, in little atomic battery and in microprocessors. Almost every engineer who works in organization connected to electricity should know how significant the voltage sensors are. The usage of semiconductors instead of tube systems permits to reduce the sizes and weight of electronic systems. When semiconductors are used some significant features as power and reliability are being developed much. Day after day we can hear about some modern systems that assist humanity to have more conveniences or even save the lives.
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Such newest semiconductor systems as diodes are broadly used today. The history of pulsed power devices started in late 60’s when the American physicians developed the first system that operated on utilizing of some semiconductor matters.
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