Hand rubbing nuclear fusion live in the wilderness

Chapter 193 Magnetic Recording Materials

When Won found all the materials needed to prepare magnetic storage, he looked up and saw that the virtual screen was already full of colors.

Seeing all kinds of bullet screens asking for resources, the corners of Han Yuan's mouth twitched, a little speechless.

The domestic god of harmony is so powerful that no one has watched the movie now.

Unlike some island country, not only can it be photographed openly, but it can also be sold openly.

Shaking his head, Han Yuan ignored the group of hungry people and came to the chemical laboratory with materials.

He is no stranger to magnetic storage. After all, CDs, magnetic tapes, and hard drives are all magnetic storage, and he has used them before.

It's just that he never thought that he would one day make magnetic storage devices by himself.

It should be mentioned here that solid-state hard drives and U disks do not use magnetic storage, but semiconductor storage.

Compared with magnetic storage, the advantage of using semiconductors as storage media is that it can make the volume small and easy to carry;
Moreover, unlike magnetic storage devices such as hard disks, it has no mechanical structure, so it is not afraid of collisions and has no mechanical noise; the power consumption is very small; the read and write speeds are also very fast.

There are many advantages, but it is extremely difficult to manufacture.

The reason for saying this is because he also thought about using semiconductors to prepare memory at the beginning.

But after thinking about it, I gave up.

Although he has silicon carbide semiconductor materials in his hands, he has also mastered ion implantation and P-type silicon manufacturing technologies.

But there is no radio ion detection optical mirror in hand, so it is impossible to detect the state of the ion layer.

Moreover, the mastered 'electrothermal-ion infiltration method' cannot perform ion implantation in multiple trenches.

Semiconductor memory has high requirements on the stability and density of the ion layer, otherwise it will not meet the reading and writing requirements at all.

Therefore, the Korean won can only choose the original magnetic storage as the memory of the transistor computer.

Among the materials brought over are iron, aluminum, and some other chemicals such as sulfuric acid.

After checking the materials and confirming that they are correct, Won started to manufacture magnetic drum memories.

The audience in the live broadcast room saw that he was getting busy, so they stopped messing around and turned their attention to the live broadcast screen.

After seeing the won begin to melt the aluminum and stamp it into sheets of aluminum, the curiosity of the audience 'scratched' came up.

[Aluminum sheet?I remember that the disc doesn't seem to be made of aluminum, right? 】

[What is the host going to do? 】

[I broke a CD when I was a child, and the inside seems to be plastic? 】

[When I was a child, I used the disk at home as a dart, and it could fly far away with a single click. 】

[It’s okay to use aluminum as disks. The hard disks in computers are all made of disks. They’re made of plastic, which shows your age. What you dismantle are all DVDs from when you were young. 】

[I'm curious, do you know how the disk stores data? 】

The copper-aluminum-magnesium alloy was pressed and was about to be polished on a lathe. When Han Yuan saw the barrage of inquiries, he smiled and said:

"If you want to know how the disk stores data, you need to know the structure and principle of the disk."

"No matter what kind of disk it is, the main body can be divided into two parts."

"Part of it is a disk for recording data. The aluminum alloy pick in my hand is used to make the disk."

As he spoke, he raised the crude aluminum alloy sheet in his hand, and continued:
"The other part is the magnetic head for writing and reading data."

"In fact, the manufacture of the disc is not difficult. Aluminum alloy or plastic is used as the base, and then the electromagnetic material is plated on one side. Everyone can make it at home."

"The difficulty is the manufacture of the magnetic head, but we will talk about this later."

"The reason why disks can store data is actually based on the efficiency of electromagnetic induction."

As he said that, Han Yuan looked from left to right, took two glass rods from the side of the plate, put the rough aluminum ones on the experiment table, held a glass rod in one hand, pulled it through the camera and said:

"In layman's terms, if the aluminum sheet is compared to a disk, and the glass rod is compared to a magnetic head, then one of the two glass rods is for writing and the other is for reading."

"When writing, a current will flow through the head in my right hand, and a corresponding magnetized area will appear under the head."

"And there is a layer of magnetic material on the surface of the disc. When this magnetized area is swept, it will leave marks on it."

"Of course, this trace is invisible to the naked eye."

"But if you magnify the disc with a microscope, you can see that the surface of the disc after writing data is uneven."

"The convex place is magnetized, and the concave place is not magnetized;"

"And the raised place represents the number 1 in binary (magnetization is 1), and the concave place represents the number 0."

"So the hard disk can store information such as text and pictures in binary."

"As for reading, there is no current attached to the magnetic head, and when the magnetized recording magnetic layer is located under the magnetic head, the recording magnetic layer and the magnetic head core form a closed magnetic circuit."

"Thereby forming a weak electrical signal is recorded by the magnetic head."

"This is the reason why the disk can save and read data."

Using simple language to describe the operating principle of the disk can be regarded as Won taking care of most of the audience in the live broadcast room.

If you use professional language, it is estimated that 90.00% of the people above nine will be dumbfounded.

After describing the working principle of the disk, Han Yuan looked up at the virtual barrage, wanting to see if the audience in the live broadcast room understood.

He explained everything in this way. If you still don’t understand, then there is nothing you can do.

However, the feedback on the barrage made Han Yuan very happy.

【I go!I actually understand!Can you believe it? 】

【understood! 】

[I understand too, I really understand. 】

[Tears streaming down my face. GIF, I finally understood it once! 】

[It would be great if we can say this in the future, each of us can understand!Great interest! 】

【The so-called everyone doesn’t seem to include me, I still don’t understand o(╥﹏╥)o 】

【It's so simple this time?Stop pretending? 】

[It’s not easy. Since the anchor entered the electrical age, I haven’t understood much. I didn’t expect that I could understand the operating principle of the disk. 】

On the virtual screen, most of the barrage was swiping for him to understand, and Han Yuan felt inexplicably like an old father in his heart.

It's not easy.

However, he thinks that arousing the audience's interest in science is better than letting them watch those little fresh meat and family ethics dramas.

The prepared aluminum alloy plate is holed in the center of the disc with a two-axis lathe, and then further polished, trimmed, and polished, and finally made into concentric circles of the same size.

The polished aluminum alloy disc can even be used as a mirror, showing the smoothness of the surface.

It's just that his aluminum alloy disk is a bit larger than ordinary disks, with a diameter of sixty centimeters.

But there is no way, after all, the larger the disk area, the larger the storage capacity.

After processing the base of the platter, the next step is magnetization.

As for the method of magnetism plating, there are many kinds, such as electroless magnetism plating, electroplating magnetism, and even glaze method if there is no condition.

However, the thickness and uniformity of the magnetic plating on the disk directly affect the quality of the finished disk and the efficiency of reading speed.

Some options, won will naturally choose the best way.

The electroplating magnetic layer is the plating method he uses.

Compared with electroless plating and other methods, electroplating and magnetic plating are more excellent.

The thickness of the plated magnetic layer is more uniform, and the structure of the plated layer is also denser.

There will be no situation where some places are not plated.

With the processed aluminum alloy disc, Han Yuan returned to the chemistry laboratory.

He is all too familiar with the application of magnetic fields.

After entering the era of electrification, basically a large part of electrical appliances will use magnetic fields.

Such as generators, motors, transformers, voltage regulators.

It is easy for him to plate a layer of magnetic material on the aluminum alloy disc by electroplating.

Manufacturing the frame, configuring the electrolyte, winding the coil, and manufacturing the anode, a series of operations can be described as easy.

A little more troublesome is the configuration of the magnetic material.

He used iron-chromium oxide magnetic materials. After electrolysis, positive chromium-iron ions of the gamma system can be generated, and then attached to the aluminum alloy disc to form a thin magnetic layer. ,

The iron-chromium oxide magnetic material is a hard magnetic material, which has high resistance to temperature, is not easy to lose magnetism, and can maintain the magnetic state for a long time without degrading.

It can't be said to be the best, but it is also a magnetic material that fits well in his hands.

After all, the transistor computer is only manufactured now, and it will definitely be upgraded in the future.

The electroplating of magnetic materials has strict requirements on time. After all, the longer the electroplating time, the thicker the auxiliary layer of magnetic materials on the aluminum alloy will be.

The magnetic layer of the disk is not as thick as possible, so Won can only stay in front of the electroplating instrument and keep an eye on the time and the bubbles in the electrolyte.

As soon as the time was up, he immediately cut off the power supply of the sulfuric acid battery, used a plastic clip to remove the clip with the engraved magnetic layer, and then cleaned off the residual electrolyte on it.

According to the experimental process in mind, the clear, clean and dry disk has been manufactured.

If it is a modern optical disc and hard disk, there are steps such as coating and inspection behind.

Of course, it is impossible for modern CDs and hard disks to be rubbed by hand like him, which is seriously substandard.

Modern hard disk manufacturing has been all manufactured in a dust-free mechanized airtight workshop.

With the speed of tens of thousands of modern hard disks, a little bit of dust attached to the surface of the disk will destroy the entire disk, and the magnetic head will directly destroy the magnetic layer of the disk without any politeness.

But for him, it was indeed done.

As for the detection, it is mainly for the storage density, storage capacity, access time, data transfer rate, noise and temperature of the disk storage.

However, he does not have the equipment in his hand to complete all the tests.

After all, it is the first disk, and no data has been written in it yet, and there is no instrument that can write data into it.

So the detection thing can only be dealt with after the transistor computer is manufactured.

(End of this chapter)