Liu Hanhao shook his head: "I sleep every day, but I sleep less." It's time for the critical stage. ”

Ni Guangbei was already concerned about the progress, and hurriedly asked: "What stage has it reached?"

Liu Hanhao said excitedly, "DRC has passed, and now the VS situation is not bad." As soon as this level is passed, it can be sent to the factory for tape-out. ”

"It's finally coming out" Ni Guangbei hurriedly leaned over, "I'll take a look"

After such a long period of cultivation, Gu Song finally knew that a chip had to be designed, and after the requirements, specifications and architecture were determined, he would first do front-end design and various verifications, and then do back-end design and continue various verifications. Front-end design is equivalent to drawing purely on paper, realizing requirements from a logical level. The back-end design should consider how to route the logic circuit designed by the front-end during the real production, that is, how to really realize the logic circuit under the planned production process standard.

Each step comes with a lot of validation.

Now, even the back-end design has been completed, in the final verification link.

As long as there is no problem in this link, it can be sent to the chip foundry for tape-out, that is, trial production, and then the physical object of the chip can be obtained for further testing.

Ni Guangbei looked at the current progress excitedly, and asked, "Is the packaging scheme decided?"

"Of course it's all ready" Liu Hanhao glared, "I'm an experienced person"

Gu Song looked at the two bigwigs there, discussing excitedly a little stupidly, shook his head, and went over to see Lin Yaodong's state.

He's in class with a lot of energy.

Retrospectively, the technical team needed to develop the entire system based on this new set of standards and technologies, so that the current network speed and hardware performance can achieve a sufficient level of online video playback.

With a smile on the corner of his mouth, once this website presents a jaw-dropping effect on online video playback, there will be countless people who are interested in it.

The expansion of demand will force the infrastructure to follow up in a timely manner, and when the time comes, the idea will try to help the communication technology iterate as soon as possible.

Gu Song ran to Liu Hanhao's office and sat there waiting for the two bigwigs to finish chatting.

After a while, Ni Guangbei came over in contemplation.

"Professor Liu, you can't come," Gu Song asked with a smile.

Ni Guangbei shook his head, "Let him be busy, it's the last critical moment." ”

Sitting on the sofa, Ni Guangbei sighed, "When I was doing ASIC, how could I feel that it was much more difficult than now." ”

"There are more design tools than before, and," Gu Song said with a smile, "Old Ni, you don't look at how much money I've spent on accelerating." ”

Ni Guangbei asked curiously, "I heard Xiao Liu say that you have a lot of technical information and ideas for this chip." Said he got it from Stanford, how much did it cost?"

"Well, it cost a lot of money, and I can't say the exact amount. ”

After Gu Song finished speaking secretly, he asked, "Elder Ni, come here today and have other things?"

Ni Guangbei nodded and said, "I just came back from the Ministry of Information Industry, and I asked them to coordinate and promote this set of coding standards. chatting and chatting, he said that Loongson's press conference was scheduled for the 28th, and he sighed for a while, so he came over here to have a look. Hey, speaking of which, I still hope that we can start to tackle the core chip soon. ”

"Actually," Gu Song thought about it, and still said, "I've been thinking about memory chips recently." ”

Ni Guangbei was stunned and asked, "What's next for memory chips?"

Gu Song shook his head, "It's not the next step to do this, when the decoding chip comes out, the next task is the image processor." However, I would like to study the memory chip privately and see if there are any ideas for improvement. Didn't I start taking these classes this semester? ”

Ni Guangbei was speechless, your basic course on microelectronics, just consider the improvement ideas of memory chips, isn't this a cutting-edge problem

Gu Song looked at his expression and said with a smile, "Old Ni, don't look down on me." I can think about ideas, but if I have an idea, isn't there still a side that can cooperate with the verification? ”

"How do they verify that the main constraint of the memory chip is the process, they are just the design team in the lab. ”

Gu Song said, "There is also room for improvement in the circuit, in short, you also know that this is not an overnight thing." What I'm thinking about now is to see if I can first have a good idea and direction, and then see what difficulties need to be overcome in this direction, and then think about making this chip in earnest. ”

Ni Guangbei smiled, "If you really have an idea, you will be blind." Unless you use a process that is worse than others to make a better product than others. How is this possible, if it is only in the field of low-end products, the cost is reduced a little through improvement, and the effect is limited. ”

Gu Song smiled and said nothing, 3dnand is just not limited to the manufacturing process.

Today's chips are basically 2D, and on a flat surface, the performance of the chip is limited by the order of the transistor. Therefore, logic chips like CU can only pursue the process technology, from the 100nm level to the 10nm level, the performance will be greatly improved, and the cost will be greatly reduced.

But the memory chip is different, its circuit is much simpler than the logic circuit, and it is a massive repetition of the memory unit circuit. If you continue to follow the 2D idea, of course, you are also pursuing the process to improve performance. Of course, at that time, the promotion from SC to C and even later TC was to embroider finer flowers on embroidery needles.

But 3dnand really has a different approach.

Strictly speaking, it is not an improvement in chip design and production, but a packaging technology.

Since the limit of the number of storage units on a flat surface is there, it is better to pile them up layer by layer.

I can't do your 100nm process, it's okay, I use the 200nm process, and I'll stack 24 layers, are you afraid?

That is, the memory circuit is relatively simple, and this idea can mature quickly.

Of course, this is not to say that the packaging process of 3dnand is simple. On the contrary, this is a process with a high threshold, otherwise it would not have been by the time Gu Song reads the file, and there are only four companies in the world that have this ability.

But now that Gu Song has black technology in his head, and he has such a good technology roadmap in his memory, he naturally has to try it.

At the end of the day, a bunch of papers were scattered, and a large stack of patents was piled up into a patent pool. If the level of craftsmanship is sufficient, whether to use it or not, how to cooperate, this has to be discussed.

Ni Guangbei looked at his expression, stared at him for a while, and said leisurely, "You must already have an idea, just say it, I'll help"

Gu Song touched his chin and thought for a while, "Otherwise, Elder Ni, you and I, as well as Lin Yaodong, the three of us will set up a group first." I'll sort out my thoughts again, you help me check and let Lin Yaodong do some specific work, let's give it a try"

An academician god, a future bull, and a grinning open-hanging reading dog.

Gu Song grinned, looking very combative