If Director Bi heard what Gao Fan said, he would probably point his finger in the nose and yell at him for talking nonsense.
What, there is no technical threshold for photoresist. Are you talking about the paste for pasting Spring Festival couplets?
Photolithography technology is known as the master of human industrial achievements. The manufacture of photolithography machines certainly involves countless cutting-edge manufacturing processes, and the development and synthesis of photoresist also requires the perfect integration of chemistry and physics.
An excellent photoresist needs to consider sensitivity, contrast, etching resistance, resolution capability, exposure latitude, process latitude, thermal fluidity, expansion effect, viscosity, warranty period, etc. Researchers need to start from theory
After designing compounds that meet the conditions, finding ways to synthesize them, and constantly optimizing the formula in practice, there is a very small probability that an effective photoresist can be developed.
Sometimes, the developed photoresist performs well in some aspects, but still has problems in other aspects. At this time, it is necessary to coordinate with the integrated circuit manufacturer to adjust the photolithography process to avoid defects in the photoresist.
In short, in one sentence, it is a complete layman's statement to think that there is no technical threshold for photoresist.
So, is Gao Fan an outsider?
Obviously not.
The reason why he dares to say that the threshold for photoresist is not too high is because he is familiar with the development of global photoresist technology from the 1980s to the first 20 years of the 21st century. Currently, photoresist manufacturers in the United States, Japan, Germany, and the United Kingdom
The technical know-how he was struggling to explore already had a clear answer in his mind.
Gao Fan was given a manufacturing drawing of an EUV lithography machine, but he was unable to build the equipment. Because manufacturing this equipment requires the use of many types of precision machine tools, and these machine tools have not even been developed by Western countries.
However, the synthesis of photoresist does not require complicated equipment. With the formula and process, he can completely manufacture photoresist.
The era before Gao Fan's time travel was when Western countries imposed a blockade on China's semiconductor technology. Although the Chinese finally broke through the blockade and became "far ahead", Gao Fan deeply felt the aggrievedness of being blackmailed and unable to fight back.
I have experienced it deeply, and even after traveling to this day, Gao Fan still feels deeply about this matter.
Gao Fan is not a mechanical expert and does not know how to speed up the research and development process of domestic semiconductor equipment, but he has chemical engineering knowledge that is 40 years ahead of his time. In the field of photoresist, he can make a difference.
Xu Yun frowned, unable to follow Gao Fan's thoughts, and asked: "What do you mean by international market? You don't want the institute to sell photoresist to the United States, do you?"
"Why not?" Gao Fan asked.
"How is this possible!" Xu Yun blurted out.
"Why is it impossible?" Gao Fan continued to ask.
Do we need to ask why?
Xu Yun looked at Gao Fan, full of doubts.
What is photoresist? This is an industrial product.
Well, China can also export some industrial products to the United States, but only labor-intensive products, okay? Photoresist is a typical technology-intensive product, or a high-tech product.
Isn't it obviously impossible for China to export high-tech products to the United States? Gao Fan actually asked why.
Fortunately, Xu Yun had chatted with Gao Fan several times before and knew that Gao Fan was a top student at Peking University and was highly appreciated by Yun Zhongming. Such a person was obviously not a brainless person. Since he was staring at him
If you ask why, I'm afraid you just have some ideas.
"The level of semiconductor technology in the United States is more than ten years ahead of ours. The number of integrated circuits produced by a factory in the United States in one week is higher than the output of our country in a year.
“The equipment currently used in the production of integrated circuits in our country is all imported from countries such as the United States, Japan, and Germany, and it is their technology at least five years ago.
"As for the G-line photoresist we are currently developing, it is not actually a development at all. It is just an imitation of similar products made by Yinghua in Tokyo, Japan. It took Director Bi and the others more than a year to basically master the other party's technology.
The formula is available, but the synthesis process has not been figured out yet.
"In this case, you said that we can develop photoresist and sell it to the international market. Isn't this... too ambitious?"
At the end of the sentence, what he actually wanted to say was "Idiots talking about dreams." When the words came to his lips, he felt a bit mean again, so he changed his words to a gentler one.
Gao Fan listened to what he said in one breath, laughed, and said: "You are right. However, isn't this exactly our problem? We always feel that we are lagging behind, always following others, and using other people's products.
Engage in reverse development.
"By the time we have thoroughly studied other people's products, they have already developed a new generation of products, but we are still lagging behind."
"This is an objective reality." Xu Yundao said, "Our country has a poor foundation, a weak foundation, and has been delayed for so many years. Isn't it inevitable to fall behind? We have indeed begun to catch up now, but to catch up with other people's level, we don't have fifty
Can it be done in a year?”
"Stop, stop!" Gao Fan waved his hand, "Let me tell you, Lao Xu, why didn't I think you were such a talkative person in the past?"
"Talkabout?"
"I just have a chronic disease that likes to talk, and it's very difficult to cure."
"..."
Xu Yun was speechless.
Damn it, is this how you Peking University people hurt others?
"I didn't say that we want to catch up with the United States in all aspects, but just a photoresist has nothing to do with the poor foundation, right? The G-line photoresist you are developing is made of phenol resin.
The film material uses naphthoquinone diazonium as the photosensitive agent, and then adds some solvents and additives.
"The mechanism of action of diazonaphthoquinone can be represented by such a diagram..."
As Gao Fan spoke, he had already taken out a pen and paper from his bag. He pushed away the rice bowl in front of him, spread the paper on the table, and drew a schematic diagram for Xu Yun. While drawing, he explained:
"Under the action of light, the diazo group will undergo Wolff rearrangement to generate ketene, which will further generate indene carboxylic acid in the developer, thereby promoting the dissolution of the phenolic resin and forming a circuit pattern. In the non-exposed area, diazonaphthoquinone
There will be hydrogen bonding, electrostatic and coupling interactions with the phenolic resin, which can inhibit the dissolution of the phenolic resin in the alkaline developer.
"There are several aspects that we can do..."
Xu Yun had also come over and listened carefully to Gao Fan's narration.
At the beginning, Gao Fan only talked about some basic principles. Although Xu Yun did not study chemistry, he had stayed in the 08 laboratory for so long and had heard a lot of things. He knew that what Gao Fan said was correct.
Further on, what Gao Fan said was beyond the scope of Xu Yun's knowledge. He could not tell whether Gao Fan's words were correct, but with the sensitivity of a top student, he realized that Gao Fan seemed to have grasped