What Does Word Semiconductor Mean and How Does It Work
There is a detached class of substances which is named semiconductors. People got known about these substances in the end of the 19th century, but only in the 20th century scientists managed to get more knowledge about them. In 1923 Russian scientists proved the ability of usage of semiconductor-metal contacts to accelerate the producing of fluctuations. During several years igct were ejected by tubes. First transistor was developed in Bell's laboratory in 1949. This event impacted on the fast development of semiconductor devices. The intensive research of the characteristics of semiconductors was started at the same time.
The interest to optical features of semiconductors revived because of discovery of simulated emission in semiconductors. It caused the appearing of semiconductor laser device based on utilizing of p - n barriers and then on heterojunction.
Modern developers can offer a wide range of variant semiconductor devices to their consumers, for example power semiconductor devices. Semiconductor substances have been studying for not so long but radio electronics and lots of other sciences can't do without usage of them.
Semiconductors are a broad class of matters that are characterized by the value of conductivity that is situated between the conductivities of metals and isolators. Such substances as germanium, silicon, selenium and some others are believed to be semiconductors.
It sounds a bit strange but physicists didn't want to carry out experiments of semiconductors for a long time. Abram Ioffe is a Russian scientist who started carrying out different researches in area of semiconductors. This genius proposed some techniques of use of semiconductors and every modern system is based on such principles. Any semiconductor system has such main characteristics as electron and hole conduction. Such characteristics may be changed by means of adding some admixtures or modifying temperature. To get the features that are needed for the experiment or appropriate usage of device some admixtures are added to semiconductors.
Almost every area of modern technologies means use of semiconductors. Diodes, transistors and thyristors are the most frequently used systems. The broad application of semiconductors began not so long ago but today they are truly widely used. There are devices based on semiconductors that can convert luminous and heat energy into electric power and vice versa. With usage of electricity they may create heat and cold. Semiconductor systems may be found in radio receiver and quantum generator, in little atomic battery and in microprocessors. Almost every worker who works in company connected to electricity should know how important the current sensors are. The weight and overall dimensions of semiconductor systems are significantly smaller than their tube analogues. The analogue systems are not equal if we talk about their reliability and power. Tube falls behind.
Day after day we can hear about some newest inventions that help people to have more conveniences or even save the life.
This entry was posted on Wednesday, June 25th, 2008 at 10:10 am and is filed under Science & Progress. You can follow any responses to this entry through the RSS 2.0 feed. Responses are currently closed, but you can trackback from your own site.
