In the next week or so in Hushan, Hu Yiting devoted himself to the design of flash memory particles.

Because the three world-leading new technologies developed by the Lake Research Institute have achieved preliminary results, the first round of engineering tape-out for flash memory particles has been carried out, and a very small number of engineering samples have been taken, but the 0.35 micron process in the laboratory of the Lake Research Institute is still immature.

But fortunately, as long as there is a sample, it will make the explanation intuitive, Hu Yiting can give a targeted explanation to the Lake Research Institute and many engineers who came from the Beijing Central Research Institute to participate in the research and development of the sample, including Cao Yunuan, who has just graduated with a master's degree and joined Chongguang for doctoral internship, and Zhao He, who has been stationed in the Lake Research Institute for a week, and other chip designers who have been stationed in the North Capital for a week, of course, there are experts from the Chengguang Institute, and the horse institute that has not left Hushan is also among them, and learned that Hu Yiting is going to give a technical explanation of the first 0.35 micron engineering tape-out in China today, and he deliberately postponed the schedule of returning to Chengdu.

There is an internal boiler in the Lake Research Institute, the radiators are burning all day long, and the conference room is so hot that people sweat, Hu Yiting only wore a white long-sleeved shirt and thin woolen trousers standing in front of the conference room, and the computer took a photo of the sample under the electron microscope with a slide projector on the screen, and the microstructure on the chip in nanometers was magnified like a bucket.

He slept in the office last night, and was full of energy at the moment, looking at more than 30 pairs of wise and focused eyes on both sides of the long table, and said eloquently: "You have all seen these photos before the meeting, and you have also counted the morphology and structure of the gate embedded layer. ”

"First of all, I think that the main reason why there will be a large number of defective products that cannot be read and written in this engineering tape-out, and the yield rate is extremely low, although the current 0.35 micron experimental process of the Lake Research Institute is immature, no matter how immature, the yield rate cannot be so low. ”

Everyone in the conference room breathed a sigh of relief, especially the engineers who are currently tackling the 0.35 micron process in the laboratory, and they all felt that Hu Yiting's words were really the greatest comfort to them.

"You look at this electron microscope flaw detection diagram, the left is the good product this time, the right is the unqualified product this time, the difference between the buried layer diffusion structure in the normal form on the left and the right is obvious, I know you must be thinking now, why do these defective products appear on the right?

Let me tell you, according to my judgment, this is because when we implant the ion implantation of the diffusion layer, because the vacuum of the implanter is not enough, the thickness of the oxide film embedded in the diffusion layer is thin in the middle and thick at the periphery, and the thin part is insulated, resulting in leakage in the middle. ”

Some of the engineers in the audience suddenly realized their expressions, and some nodded excitedly, indicating that as expected, Hu Yiting's judgment was the same as theirs.

Hu Yiting continued: "I won't elaborate on this problem, I wasn't there some time ago, it's understandable to do badly, anyway, I finally trained the team and improved everyone's experience in overcoming difficulties, I think failure is also a good thing, and it gives us the experience we have summed up, if nothing happens, I don't think it's good, so everyone can't learn anything." ”

Hu Yiting continued: "After the emergency coordination between Xi Institute and Changsha Institute of Optoelectronic Equipment, that is, the 48th Institute of Electric Technology, they immediately sent a team and brought the improved vacuum components of the new ion implanter they are currently developing, and are currently upgrading and modifying our old model equipment. ”

Some of the engineers present are still hanging in their hearts, worried about what to do if the modification and upgrade still can't solve the problem, but most of them are convinced by Hu Yiting, feeling that he can see at a glance that the key to the problem is not simple, and he can immediately find the answer to the problem, which is even more difficult, what a professional and experienced experience! This is an 18-year-old young man! It's like a fox spirit who has been soaked in process research and development for many years.

Hu Yiting didn't care what everyone thought, continued to press the mouse, changed the picture on the projector, and continued to explain: "This picture is very classic, I didn't expect that I could still see this form in my life, everyone remember, according to my more than ten years of process experience, this is a typical feature of poor adhesion of silicon caricature, is a problem of polysilicon growth process, the solution is to improve the cleaning process of silicon carcity before growth, so as to eliminate the phenomenon of poor adhesion." ”

After Hu Yiting finished speaking, everyone first had such expressions, and then they were all stunned, and then a small burst of laughter broke out in the conference room, and everyone was smiling, thinking that Hu Yiting was joking.

Hu Yiting was also stunned, and then he realized that he had made a mistake, and quickly explained the ridicule: "I'm kidding, everyone knows that I'm only 18 years old, haha...... Ha ha...... Ha ......" He laughed awkwardly, and the more he explained, the more he felt like a bad joke.

Xi Longshan, who was sitting next to him, narrowed his eyes into a line with a smile, and said that Hu Yiting's cold joke probably wanted to mock those who didn't see the key point, to be honest, although he saw the problem, he really couldn't be sure that the reason was in the cleaning process before the growth of silicon caricature, but he was just suspicious, from this point of view, Hu Yiting really looked like a top scientist with more than ten years of process experience!

Then Hu Yiting continued to explain to everyone the places and specific methods that need to be improved in the future, everyone listened with relish, quickly took notes, everyone felt that Hu Yiting had opened a brand new door in front of them, and this door had been suffering from the blockade of Western technology and had never been able to peek into it! The scientists and engineers present felt as if they were listening to top experts from world-class laboratories teaching top-secret technology, but the absurdity was that this expert was not strictly speaking 18 years old this year!

But these technologies are really old for Hu Yiting, they are all problems that he has encountered countless times in the university laboratory, and the solutions of later generations are naturally mature and can not be more mature, so he said quickly, and then changed the picture, and continued: "Look, this is a photo of the polycrystalline silicon film after etching, and these pitting above are etched spots or dents, what do you think of these scars?"

Seeing that everyone didn't speak, Hu Yiting had to quickly explain: "From the morphological analysis, this is caused by the insufficient dry etching allowance, there are many factors that affect the etching conditions, and our 0.35 micron process technology is still being further debugged, and the cooperation between the new lens of the lithography machine and the double workpiece table has not yet reached perfection. ”

The conference room was quiet, some of them nodded, some of them contemplated, like looking at gods, staring at Hu Yiting's dignified explanation.

After New Year's Day, Cao Yunuan joined Chongguang for a doctoral internship, and today is the first time she has seen Hu Yiting again, seeing that the lover of her dreams is still so unstoppable and lightweight, like a huge icebreaker that can easily break through the thick ice on the sea of science.

In the face of the prince charming that she never forgot, Cao Yunuan's expression was very enthusiastic, and she began to constantly ask technical questions in the meeting, and directly regarded Hu Yiting as her doctoral supervisor Xia Lao to ask.

And Hu Yiting felt that although Cao Yunuan's questions were relatively simple, it was a good thing for someone to ask questions, at least it also allowed those who were embarrassed to ask questions to get answers, so they knew everything about her.

Cao Yunuan felt that by asking questions, the relationship between herself and Hu Yiting seemed to have returned to that windy day, the campus where the leaves were flying, and the relationship was warm and close again.

She thought, can Tong Mu understand Hu Yiting's words? Definitely not! Only I really understand Hu Yiting......