Life 1984

Li Yunhai caught up with Ji Wenshu.

Ji Wenshu said repeatedly: "I'm fine, I'm going to the bathroom."

After that, she hurried into the women's restroom.

Li Yunhai waited outside for a while and saw Ji Wenshu coming out.

"It's been so many years since the incident, why do you still care so much about him when you mention him?" Li Yunhai asked, "Have you not gotten over it yet?"

Ji Wenshu shook her head: "Actually, I don't miss him anymore. What I miss is my youth."

Li Yunhai said: "I heard that if a woman gives her most precious chastity to someone, she will never forget him for the rest of her life."

Ji Wenshu was stunned for a moment, then said shyly, "Mr. Li, it's not what you think. He and I separated as soon as we graduated, so there was no relationship between us at all."

Li Yunhai was even more incredulous and asked, "Since you didn't have any relationship, why are you so miserable?"

Ji Wenshu said, "I just had a sudden feeling. Mr. Li, I'm sorry. I think I'd better go back."

Li Yunhai looked at the time and said with a smile: "How about we find a place to sit?"

Ji Wenshu was in a bad mood and said, "Come sit with me for a while?"

Li Yunhai sent her back to her residence.

Ji Wenshu didn't drink, so she poured two cups of tea, handed one to Li Yunhai, and said, "Mr. Li, I'm really sorry today. I failed your expectations."

Li Yunhai smiled and said, "It's okay. The most important thing is that you have to move on from the past. Otherwise, no matter how much we do for you, it will be in vain."

Ji Wenshu is truly a workaholic.

The house is full of books, and they are all related to the lithography machine she is studying.

These books are as obscure and difficult to understand for most people as reading books written in heaven.

Li Yunhai picked up a book at random and read it for a while before he felt a headache.

"Boss Ji, are these all the information about the photolithography machine?"

"It should be said that it is relevant information. Photolithography involves various disciplines."

The photolithography machine not only involves mechanical expertise, but also requires mastery of multiple interdisciplinary expertise such as electronics, manufacturing, and chemistry.

Electronic information, electrical engineering, mechanics and materials are the four core disciplines that constitute the lithography machine. Energy science provides guarantee for the energy supply of the lithography machine. Computer science is a necessary condition for the lithography machine to be able to operate automatically for a long time and realize human-computer interaction.

In order to develop the immersion lithography machine, Ji Wenshu had to have a comprehensive understanding of all these disciplines.

And they are all the most advanced academic technologies!

Li Yunhai can be considered to be knowledgeable and talented.

But compared to the woman in front of him, he could only be considered as someone who had read a few books.

He finally understood why Ji Wenshu had no time for socializing.

Because Ji Wenshu spends all her time on work and study.

Just reading these books takes a lot of time and energy!

When Ji Wenshu reads books, she must read them carefully, not just casually without understanding them, which takes more time.

Li Yunhai and Ji Wenshu talked about work again.

Ji Wenshu reported the progress of scientific research to Li Yunhai.

It was Li Yunhai who first proposed to develop an immersion lithography machine.

Immersion lithography refers to a new type of lithography technology that fills the space between the projection lens of the lithography machine and the semiconductor silicon wafer with a liquid to obtain better resolution and increase the numerical aperture of the lens, thereby achieving a smaller exposure size.

Li Yunhai only knew that there was such a technology.

But he only knew the fact, not the reason.

He couldn't describe the specific technology of the immersion lithography machine.

Ji Wenshu said: "Mr. Li, the immersion liquid we are using now is cyclooctane. But we still have many problems to solve. We have to solve key problems such as the filling of the immersion liquid, the contamination of the lens, the stability of the photoresist and the damage caused by bubbles one by one."

Li Yunhai asked: "How long will it take to solve these problems?"

Ji Wenshu said: "It's hard for me to say now. There are too many problems. We can only study and solve them at the same time."

Before 2000, the industry generally believed that 193nm lithography could not be extended to the 65nm technology node, and 157nm would become the mainstream technology.

However, the 157nm lithography technology encountered a huge challenge from the lithography machine lens.

This is because most materials strongly absorb 157nm light waves, and only CaF2 can be used. However, the defect rate and aberration of the ground CaF2 lens are difficult to control, and the price is quite expensive. To make matters worse, its service life is also extremely short, and frequent lens replacement is unacceptable for the chip manufacturing industry.

Visionary scientists have long seen the limits of future lithography machines.

They are always looking for new breakthroughs.

Sihai Group is not the only company researching immersion lithography machines.

The current mainstream research direction is based on 157nm immersion lithography.

However, the difficulties encountered made everyone stop in their tracks.

Now, Ji Wenshu is facing the same problem.

Other scientific research institutions have given up on this topic and turned to other research areas.

But Sihai Group did not give up.

Because Li Yunhai knew that in a few years, the immersion lithography machine would definitely be developed.

In other words, there is always a way to break through the current bottleneck.

Unfortunately, Li Yunhai was not engaged in lithography machines in his previous life.

He only knows one aspect of the specific lithography machine technology, but not the other.

Listening to Ji Wenshu talking about the specific scientific research difficulties, Li Yunhai suddenly thought of something and asked, "The current research is based on the 157nm wavelength? Right?"

Ji Wenshu said: "Yes, Mr. Li, what we need to do now is to break through the 157nm wavelength. However, at a wavelength of 157nm, water is an opaque liquid, and it is difficult for us to obtain the desired refractive index."

Li Yunhai tapped his forehead lightly with his fingers and said, "No! No!"

Ji Wenshu said, "Mr. Li, what's wrong? Do you have a headache? Do you want me to massage it?"

Li Yunhai fell into memories and contemplation.

It’s been ten years since I was reborn!
The memories of his past life became increasingly thinner and less important to him.

His entire body and mind were completely integrated into this world.

He would only remember very special memories from his past life.

Human memory is an amazing thing.

Maybe what happened a few days ago will be quickly forgotten.

But those unique events in my childhood are still fresh in my memory.

The brain is like an independent entity, it only remembers things that it is interested in. Li Yunhai suddenly said: "Mr. Ji, it should not be based on the 157nm wavelength, but the 193nm wavelength!"

Ji Wenshu asked in confusion: "What do you mean?"

Li Yunhai said: "The most important point about immersion lithography is that it is not based on a 157nm wavelength! It is based on a 193nm wavelength!"

Ji Wenshu pondered and said, "193nm wavelength? Why? We can obviously break through to 153nm wavelength now! Do we have to start from 193nm wavelength?"

Li Yunhai said: "You are right. At a wavelength of 157nm, water is an opaque liquid. But at a wavelength of 193nm, it is almost completely transparent. And the refractive index of water at 193nm is as high as 1.44, while visible light is only 1.33."

Ji Wenshu's eyes lit up. She was a smart person and she could think of the feasibility of this plan immediately.

Li Yunhai said: "If we combine water, a very ideal immersion liquid, with the already mature 193nm lithography equipment, then we only need to make minor improvements and focus on solving the problems related to water immersion, and the 193nm water immersion lithography machine will be just around the corner. At the same time, the equivalent wavelength of 193nm light waves in water is shortened to 134nm, which is enough to surpass the limit of 157nm."

Ji Wenshu couldn't help but applaud: "Boss Li, you are awesome! You helped us solve the problem that we couldn't solve for so long with just one sentence!"

Li Yunhai thought to himself, I also borrowed the light of wisdom from rebirth!

Otherwise, even if you make me want to kill a billion brain cells, I still can’t think of this method!
Ji Wenshu took a pen and paper, leaned over the coffee table, and wrote down what Li Yunhai had just said.

"193nm water immersion lithography machine! Mr. Li, this is our direction!" Ji Wenshu said excitedly, "No wonder we have not been able to research it, it turns out that we have taken a detour!"

She wore a sexy and beautiful short dress to attend the social dance today.
When she bent down at this moment, her perfect figure was clearly visible.

She is obsessed with scientific research and does not pay much attention to her diet, so she maintains an excellent figure.

Among the crowd, Ji Wenshu is not a particularly stunning beauty.

Whether compared with Lin Zhi, Shen Xiulan, Su Hong, or Chen Meilin, she is slightly inferior.

But there was something special about her.

A person with a wealth of knowledge and culture has a naturally elegant temperament!

Her demeanor reveals a noble and elegant quality that makes people fall in love with her.

The scent of books emanating from her gives people a sense of elegance.

In this world, every woman is a unique flower, some are slender and some are plump, and each has her own charm and merits.

If Li Yunhai were asked to use a flower to describe Ji Wenshu, the first thing that comes to his mind would be plum blossom.

Ji Wenshu's temperament is so compatible with plum blossoms.

In addition to her outstanding temperament, Ji Wenshu is also beautiful.

Although she was in her thirties, a few years older than Li Yunhai, her crystal clear snow-white skin sparkled with an ivory-like halo, her snow-white skin with soft lines was like a lotus flower emerging from the water, her stunningly beautiful face was flushed like fire, and her beautiful eyes, full of charm, sparkled with wisdom.

Li Yunhai sat next to her, and the two of them were so close that it was easy for occasional skin contact to occur.

In order to have a better discussion with Li Yunhai, Ji Wenshu moved closer to him and said, "Mr. Li, your idea is really great! With your guidance, we can develop an immersion lithography machine more quickly!"

Her smooth arms were pressed tightly against Li Yunhai's arms.

"Boss Ji, I just provided an idea." Li Yunhai smiled modestly, "You still have to work hard to realize it."

"We will definitely achieve it!" Ji Wenshu was full of confidence.

The neckline of her skirt was quite low.

When you lower your head, infinite scenery is revealed.

Li Yunhai thought, President Ji has a good figure, it’s a pity that he was hurt by love when he was young and still hasn’t found a boyfriend at such an old age!
Ji Wenshu felt Li Yunhai's gaze projected into her collar, and her pretty face flushed. She whispered, "Mr. Li, do you think I'm beautiful?"

Li Yunhai said, "Oh!" He retracted his gaze and said, "Beautiful! Your beauty cannot be summed up in the word 'beautiful'. You have a special scholarly temperament that most women don't have. You remind me of a talented woman in the Republic of China!"

"Who is it?"

"Lin Huiyin."

"Ah? I can't compare to her! She is truly a real female talent!"

"You also have that gentle book scent."

"Thank you, Mr. Li, for your appreciation of me. Regardless of whether what you said is true or not, even if you just said it to tease me, I am very happy." Ji Wenshu smiled and said, "No one has ever praised me like this before. You made me feel so proud. I feel proud that I have someone who loves me again and I can get married again!"

Li Yunhai said: "Of course! You can definitely get married, and marry a good man!"

Ji Wenshu smiled and said, "Boss Li, you said this. If I don't get married, or don't marry a good man, you have to cover for me!"

Li Yunhai laughed and said, "How can you say that? Besides, I think you are really excellent! Most men are not worthy of you."

Ji Wenshu smiled shyly: "Mr. Li, my requirements are really not high, and I don't care whether he has a doctorate degree or not. Education is not the most important thing. Education does not represent ability, nor does it represent his emotional intelligence. A high education only means that he has studied for a few more years."

Li Yunhai said, "How about this, next time we will hold a special blind date dance for you and find dozens of men for you! All kinds of men to meet your various needs."

Ji Wenshu chuckled and said, "What do you think of me? A commodity? Then you might as well auction me off!"

Li Yunhai said: "That's different. In an auction, it's the buyer who's choosing the goods. In your blind date, you're choosing the man!"

Ji Wenshu was no longer able to laugh, her body was swaying back and forth, and she was laughing so hard that she was exhausted.

She put one hand on Li Yunhai's arm and held her stomach with the other, groaning and saying, "Mr. Li, you have the potential to be a crosstalk artist. You might as well go on stage and do some crosstalk! This story made me laugh to death."

Li Yunhai looked at the time and said, "I have to go home. The dance is still going on. If you want to join us, you can go."

Ji Wenshu suddenly said with some melancholy: "Are you leaving?"

Li Yunhai said: "Well, goodbye!"

Ji Wenshu didn't want to keep him, so she stood up and walked him out the door.

Looking at Li Yunhai's receding back, Ji Wenshu sighed softly.

Li Yunhai returned home.

Lin Zhi, Shen Xiulan, Chen Meilin and Chen Hong were playing mahjong.

Li Yunhai wisely chose not to join in the fun. No matter who won or lost, it had nothing to do with him.

Lin Zhi asked, "How is it going? Is there anyone who can accomplish anything?"

Li Yunhai said: "How should I know? I just stayed for a while and came back. Whether it succeeds or not is their own business."

He came upstairs to take a shower.

After taking a shower, Li Yunhai lay on the bed and read a book.

Suddenly the phone rang.

He answers the phone.

I only heard Chen Jing say on the phone: "Yunhai, something happened!"

Li Yunhai was stunned and asked, "What happened?"

Chen Jing said worriedly, "Something happened at the social dance party! One of our male employees molested a female comrade from the provincial song and dance troupe! The female comrade called the police over."

Li Yunhai let out an "ah" and remained silent for a long time. (End of this chapter)