mhm Hi dear student welcome back Next explainer video tutorials on the course on the basics

of auto electrics We have already said that electrical circuits consist of resistors Capacitors transistors diodes and other

electronic components on a printed circuit board they looked like here we see capacitors we see transistors here resistors here

There is also a capacitor lead and so on The answer They take up a rather

large volume If we plunge a little into history then the first computers looked like this They were

large cabinets in which there were such electronic bowls that we looked at and an ordinary

computer occupied an entire room These are the first computers Now these computers look a little

differently They already fit on the field We even take them with you And now with the

advent of tablets they can be shoved as they say in a jacket pocket And it

is appropriate to ask how this metamor forces happened How did the equipment contained in one room

began to fit in this device Small and this became possible only thanks to the

fact that such three dimensional devices have learned to reduce people into microcircuits That is one small

micro circuit replaces a very large electronic board So how is it done in this way So people could fit

such a large device inside such a small thing The basis of any micro circuit is silicon Silicon

is the usual sand that we saw on the beach under the influence of very high temperatures

this sand can melt and straightening this signed in large furnaces They make such blanks Here are

the so called blanks Using certain technologies provide a very high frequency with the internal structure of this blank then

with the head of a special saw it is cut into very small plates At night

On these plates there are about a millimeter well of course the surface of these plates is rough

after cutting Then they need to be polished with the help of special machines and special chemicals

in several stages And in in the end we have such a plate that is

very thin and very well polished Here are the elements of electronic boards These are

resistors capacitors and so on And how do you do Let us consider a very thin layer of about

one micron off a special liquid is applied to the surface of the ceramic plates Let's say this is

not a simple liquid This is a special a composition that can work as a conductor or as a dielectric

or as a semiconductor This composition is applied by spring and after that a special device that forms of

very thin ultraviolet ray begins to draw various tracks Not only tracks but a special

form of drawings let's say So that's where the rate past there is formed and insoluble tracks Such The

pictures can be different let's say before and after processing with a chemical composition The part that was not under

the bean it the souls and the part along which the beam passed It remains And

depending on what composition was used This track can serve as either a conductive track that

is conductor Yes if for example the drawings were drawing in this way end the special composition

was applied has a high resistance Then these points of the patch day can play

the role of resistors for example Yes but if this composition was from conductor then these plates can

play the role of capacitor plates for example Thank you Well in fact the capacitor is already made not

so scattered but relatively speaking Here are the standing next to each other and these plates

can play the role of capacitors That is the essence of what With the help of an ultraviolet way

that contour or image is drawn which then remains on this substrate on a ceramic substrate The rest

of these dance which is where it is washed office Selected So we applied one layer

suppose at the previous stage we did not make a drawing like this but such areas and applied composition with

high resistance And depending on the size of these patches we have resistance so the elements

are different and they can play the role of resistors in our electronic circuit after we washed off

at the previous stage here are those areas that were not under the beam we apply a second layer

and ultraviolet rays are already drawing other spots for us here they are drawing in blue This composition that

was applied before it plays the role of a semiconductor And in addition for that to get a transistor

and we all know that a transistor is a crystal on which points are applied let's

say Then one material is introduced here Another material is introduced here from the auto electrician basics Course

we already know about this Always one wire is connected where one wire is connected where

one wire is connected In the end we get transistor how it works We already know from

the same course the basics of auto electrics If it's a little incomprehensible please return to that goes to

find lessons about transistors and please remember this material and at the moment we will not stop

at this So here we made transistors in several ways I will say then this way and

now we need to connect them in the general electrical circuit The electronic circuit After we

have applied the photo transistors we need to somehow connect them all the the electrical circuit for this

we apply another layer Already a layer that has good conductivity This is yours will play the role

of conductors The rate rose here the drawings that is it forms these The paths are then washed

off with the help of chemical means and in the end we get this the electronic components of this

circuit are interconnected according to the electrical circuit or electronic circuit diagram Here we have resistors Yeah here we see

here we see transistors of communication and here we have conductors that is by applying different materials

in several layers and processing these layers we got in each case a layer one microphone Take this is

We received a full fledged electrical circuit or an electronic board But let's say 10 by five cm

in size Yes And in this case the same with whom we got in a crystal measuring two millimeters by

two millimeters off water compared the dimensions It is in this way that by reducing the size

of the electronic components that are used in computers People could now all this whole room or all the

equipment that we now fit in one room inside such a device All individual discrete elements are transistors

diodes resistors and so on From which electronic boards were made Which here we see they were made in the

form of microcircuits and microcircuits are already very small in size And it is important

to not that inside one crystal it is possible to reduce not only hundreds but also billions of transistors Diodes

resistors and so on Were already through a different technology Yeah Mhm in other words one

microns thick layers with different properties are applied to the silicon substrate here One layer has the

properties of resistors another a layer of capacitors The third layer of dials and so on and

so on under certain conditions the conductors we connect and we get such a crystal

in which up to billions of elements are placed in modern processes Up to one triple

zero triple zero triple zero ir three silicon play We connect the legs of the micro circuit

and connect these legs We are thus connected accordingly this electronic board that we assembled in a

silicon wait for it is in this way that such dimensional printed circuit boards which

are made up of discrete from individual electronic components fit inside such a small micro circuit But it is

important to know that the forms and microcircuits are different but the essence is not yet in this

we are just considering and getting to knowing this topic what is a micro theme as

it is done And it is important to note that these are the manufacturing taxes which

he told only so that we have a general idea although in auto electronics we do not need

the subtleties of micro fine manufacturing This is only for a general idea So in this

topic we examined the various stages of manufacturing a microcircuits Microcircuits found application in various electronic units of cars

in this case we see the engine control unit of and injection car Yes here we see various microcircuits here

are so small The process of stance Above here are various microcircuits and each of them

plays a certain role and which we will talk about in the next lessons and now we

make a request We receive homework We do homework sent by email If you have not received

an additional assignment from me or additional questions then go to the next topic mm