Elektr energitika bs 21 grux Talabasi

play it
. Imagine seeking out 
Lady Gaga every time you wanted to hear "Poker Face."A list of 
inventions would simply be incomplete without mention of the Wright 
brothers’ historic flight. In 1903 the Wrights demonstrated that an 

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airplane could sustain flight under the control of a pilot, a feat that had 
never before been accomplished.
This invention changed everything from travel to shipping. Without the 
Wright flyer, we wouldn’t have destination weddings or last-minute 
shipping for Christmas.The Iconoscope television camera and 
Kinescope receiver were invented by Vladimir Kosma Zworykin, a 
Russian-born American engineer, in the 1920s. Transmitting an image 
from one place to another not only made it possible for you to get your 

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Saturday-morning cartoon fix, but also for news and other important 
information to travel quickly around the world. 
The sequence of operations in making one type of integrated circuit, or 
microchip, called an n-channel (containing free electrons) metal-oxide 
semiconductor transistor. First, a clean p-type (containing positively 
charged “holes”) silicon wafer is oxidized to produce a thin layer of 
silicon dioxide and is coated with a radiation-sensitive film called a resist 
(a). The wafer is masked by lithography to expose it selectively to 

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ultraviolet light, which causes the resist to become soluble (b). Light-
exposed areas are dissolved, exposing parts of the silicon dioxide layer, 
which are removed by an etching process (c). The remaining resist