Shenhao started after the college entrance examination

An Liang has not clearly disclosed his relationship with Dark Core Technology Company, but Lu Wenshan's inquiry must have guessed the clues?

But An Liang didn't care whether Lu Wenshan guessed the answer behind the scenes.

An Liang: This statement is both correct and incorrect.

An Liang: The correct side is that Dark Core Technology has indeed broken the localization of the 7nm process.

An Liang: The 7-nanometer chips produced by Dark Core, from silicon wafers to photoresist, etc., are all produced by local manufacturers in Xia.

This is real!

The chip alliance headed by Bald Eagle is blocking dark core technology. Dark core technology uses local products from Xia Country. This is due to both the ban and the reason to support local companies.

An Liang: So from a certain perspective, dark core technology breaks the blockade of 7-nanometer chips.

An Liang: But if we dig deeper, the lithography machine used in dark core technology is still Asmail’s DUV ultraviolet lithography machine.

An Liang: How can we talk about completely breaking the blockade on the premise that Xia Guo has not completed a 14-meter or even a 7-nanometer lithography machine?

An Liang: However, it is not correct to say that Xia State could not break the blockade even after twenty years.

An Liang: Technology in the chip field is indeed very difficult.

An Liang: Let me give you the simplest example.

An Liang: The 14-meter chip process requires more than 2,000 processes, including vapor deposition, photoresist application, photolithography, etching, ion implantation, chemical polishing, etc., performed repeatedly.

An Liang: Wenshan, do you know what 2,000 processes means?

Lu Wenshan: Does it mean that manufacturing chips is complicated?

Malone: ​​Does it actually require so many steps?

Shen Shizhong: It’s not just a complex issue, it also involves manufacturing yield issues, right?

An Liang: To be precise, it should be a question of yield rate.

An Liang: Chips are a high-precision industry. The accuracy even exceeds the imagination of ordinary people, and often mistakes can be made by thousands of miles.

An Liang: Take a 14-meter chip as an example. A 14-meter chip usually requires more than 2,000 processes. We assume that only 2,000 processes are required.

An Liang: Do you know what level of yield rate must be achieved among more than 2,000 processes to meet commercial needs?

Lv Wenshan: I checked the information. When Taichi was at the 14-meter node, the yield rate was only over 80% at the beginning.

Lu Wenshan: Now that top chips have developed to 5 nanometers, the yield rate of 14 meters should not be a big problem, right?

An Liang: No, no, no!

An Liang: There is a problem with your understanding of yield rate.

An Liang: Let’s take the 14-meter chip as an example. To achieve a yield rate of more than 80%, it is actually far more difficult than ordinary people imagine.

An Liang: This is because ordinary people simply don’t understand the yield rate of the chip industry.

Shen Shizhong: Brother Liang, please explain in detail!

Ma Long: Wait for Brother Liang to reveal the secret.

An Liang: As I just said, there are more than 2,000 processing steps for a 14-meter chip, which means that every step has the risk of failure. Once a step fails, it means that the chip is scrapped!

An Liang: It is equivalent to copying a 2,000-word article now. If any word is wrong, it means that the article is unqualified.

An Liang: If I say this, can you understand it?

Lu Wenshan: I understand!

Shen Shizhong: I understand too!

Malone: ​​There are more than 2,000 processes, which means that among these more than 2,000 processes, the pass rate of each process must be as high as possible. Otherwise, when it expands to more than 2,000 processes, defects will be infinitely magnified. Is this correct? ?

An Liang: That’s right!

Anliang: When there are 2,000 processes, even if the pass rate of each process is 99%, the final yield rate is almost close to 0.

Lu Wenshan: So terrifying!

Malone: ​​It’s really scary!

Shen Shizhong: Yield rate calculation video.Avi

Shen Shizhong: I have already asked the mobile smart assistant, and I can only say that the answer is exaggerated.

An Liang clicked on the video sent by Shen Shizhong

……

The video is a mobile phone screen recording, and there is Shen Shizhong’s voice.

"HeySiri, calculate 99 to the power of 00."Shen Shizhong ordered. (To read Baoshuang novels, go to Feilu Novel Network!)

"0.99 raised to the power 2000 is approximately equal to 1.8637 times 10 raised to the power minus 9."The mobile phone voice assistant displays the answer. This result is infinitely close to zero in real life.

If it is placed in industrial production, it makes no sense.

……

In the video, Shen Shizhong started calculating at 99%, and it was not until 9 (Zhao) 9.99% raised to the power of 2000 that the yield rate rose to 81.87%.

An Liang: Now you know the difficulties in the chip field, right?

An Liang: If it is a 7-nanometer chip, there will be more than 5,000 processes. If each process has a pass rate of 99.99%, the final yield rate will only be 60.65%!

Shen Shizhong: The difficulty in the chip field is indeed too high!

Lu Wenshan: So terrifying!

Ma Long: I’m curious about Dark Core Technology’s yield rate at 14 meters and 7 nanometers. Does Brother Liang know?

Author: The new book [Double Crossing Door: Trading System of All Realms] has over 700,000 words, welcome to read it.