Creation of Semiconductors and Pulsed Power Sensors in Russian Federation
Posted by: admin on October 21st, 2008
Posted: High Technologies
The material for semiconductors generally has the electrical resistance among the resistance of a conductor and a non-conductor. The resistance of semiconductors also is affected by variations of temperature or used admixtures.
The material includes impurities if some other elements have been mixed to it. Semiconductors are labeled as semiconductor assembly of type-n or type-t depending on the kind of finished material.
The union of type-n and type-t semi-conductors is applied to make diodes and transistors. Generally silicon is necessary to produce semiconductors now.
Semi-conductor substance is used to get diodes that serve for letting the stream of electrical current only in one sense. In every single diode there is a component made of positive and negative elements (p- and n-) and of barrier level (pn-transfer). Electrical schemes that change among alternating and direct current are made applying diodes. Just a part of the period or cycle is to be completed as diodes let current flow only in one sense. They call such a junction a rectifier.
Speaking of the light diodes that figure as LED, they are necessary to produce light at low voltages not creating heat. In computers, cameras and mobile phones, different equipment these days one can see light diodes as those diodes are applied to show the idle mode.
The development of thyristors production was governed by Moore's law. What is the most significant side to make complicated power semiconductor equipment at lower cost? That's lithography. Concerning optical lithography, it now leads to the popularization of alternate techniques as it has met its development limit. Admittedly ultraviolet lithography and nano-imprint lithography are to become the successors to optical lithography. Since recently specialists also consider x-ray lithography and electron beam lithography as suitable candidates.
In Russia igbt modules were first created. Sensors are applied everywhere for various purposes. They can be applied in either commercial, industrial or daily constructions. The form and value of the current sensor can change from those small light detectors to multi-functional counters reacting on radiation loss.
Alone the voltage sensor won't do. There are power system programmes responsible for many dispatch actions. They provide the check of scheduled power interchange among the adjacent power systems, mode of circuit breakers in substation and of system properties like voltage, frequency, power flow. They also allow to deal with system alarms and generate suitable action for any of them.
For the controllers to fulfil these functions they should have a full data of the whole power system received with the displays of PCs in different dependent stations. With the help of respective interfacing components the state of CB's, fuses, isolators and analog values such as MVAR, MW, KV, Amps or others was found out in the RTU. Russia and China are now the biggest exporters in this field.