It is possible without exaggeration to say that the information is the basis of the modern world. Daily millions of people around the world create millions of gigabytes of information, keeping it on their computers or mobile devices. An interesting question arises: when we write more and more information on our devices - download music, taking pictures, install applications, create documents - does this increase the physical mass of the hard disk?
Immediately, we note that in this article we will discuss the record of information on SSD discs - solid-state drives that are used in most modern devices.
The storage of information in a solid-state carrier is provided with billions of transistors that accept "1" or "0". Each such transistor consists of two semiconductors with an excess of electrons, and between them is a semiconductor with a disadvantage of electrons. Over these semiconductors, the so-called control shutter is installed, to which is supplied positive or negative voltage.
Below it is Floating shutter, from all sides of an isolated oxide film-dielectric. If you submit a positive voltage to the control shutter, then quantum mechanics are entering into the case - on the floating shutter due to the tunnel effect, part of the electrons are distinguished. Despite the presence of an oxide film-dielectric film that is not conductive.
It is interesting: Tunnel effect is a unique phenomenon inherent in quantum mechanics. Thanks to the property of the corpuscular-wave dualism (i.e., the ability to be at the same time wave and particle) the elementary particle may be on the other side of the potential barrier, even if its total energy is higher than the height of the barrier. In our case, the electron turns out to be the other side of the dielectric oxide film and goes into a floating shutter.
The floating shutter, which received a negative charge from the electrons' planted "on it, will interfere with the current through the transistor. In this case, the transistor will have the value "1". If he will carry out the current, the cell will store the value "0".
So, to record the value "1" in the transistor, it is necessary to "throw" on the floating shutter. Dielectric surrounded by a dielectric, they are able to keep charge for many years even after the computer is turned off, which is why the information is stored in memory even when we turn off our power devices. Since electrons are particles with a mass, then each recorded "unit" adds a negligible mass to the hard disk. However, it is necessary to remember that the information is not only "units", but the sequence of "zerule" and "units". If, downloading any software byte, you will change the values of the transistors from 01100111 per 10001100, then the mass of the hard disk will decrease, freeing the floating shutter from electrons to get two excess "tissue".
It turns out that when recording information, the hard disk can really become harder to the unimaginably small value. At the same time, information should be ordered in such a way that the transistors with a negative charge on the floating shutter become greater. It is quite possible, to this can also bring the deletion of information, and not its record.
Illustration: Depositphotos | Poavute_Siriphiron