3D stacking can greatly reduce production costs.

There is an advantage when used on memory chips, that is, even if there are local defects in the chip, this area can be blocked on the main control chip, and the consequence is that the storage capacity has become a little smaller.

This is different from logic chips. Although the logic chip also has some redundant transistors to prevent some logic circuits from being damaged and the bypass devices are set up, if the defect occurs on the main control logic circuit, then the chip can only be declared scrapped.

Therefore, there is basically no problem with yield rate on memory chips. As for applications, there are too many.

Camera memory card, smart device storage, microcontroller memory...

Huaxin Technology does not do any of these.

To do it, do things that are not in the world.

Wang Anran had long wanted to do a flash drive based on the USB interface, and the conditions were just right at this time.

He had enough of carrying dozens of floppy disks with him.

The key to flash memory is the main control chip, which is completely a piece of cake for today's Huaxin Technology.

There are four leads for the USB interface, two are power supply and two are data. Just design the i/o interface and data transmission protocol according to its data definition.

Such a small project is not enough to be done by Chairman Wang Da personally to host it. He called Rebs, and the project was decided.

It is very simple for Wang Anran, a top student, and it doesn't look at it in the eyes of others.

This was a project arranged by Mr. Wang himself, so it naturally received enough attention from Rebs. He immediately came to the office of Qiu Lianjun, the technical director of the headquarters.

"This is the design task book that Mr. Wang personally gave, let's take a look!"

It was just a piece of paper. Qiu Lianjun took three seconds to browse it, but after reading it, Qiu Lianjun filtered it in his mind and had a rough plan in his mind.

"Mr. Wang has always said that innovation is the lifeblood of Huaxin Technology. I am convinced that a USB interface can also make a variety of tricks."

They are all sensible people. Rebs and Qiu Lianjun are very clear about it, and they can see each other's surprise from each other in their eyes.

"Wang always wants to subvert the entire mobile storage market. I seem to have seen the end of the floppy disk market."

Qiu Lianjun nodded and said, "The best product manager in the world, no doubt, the boss puts a lot of pressure on us!"

Rebs sighed deeply, and he felt the feeling of being roasted on the fire.

"Mr. Wang handed over the task to us now. Mr. Qiu, what do you think?"

Rebs' attitude made Qiu Lianjun very satisfied.

"USB storage involves three aspects: one is the memory chip. The most mature flash memory chip is the naheflash storage structure proposed by Toshiba.

The second is the transmission protocol based on the USB interface.

The most important thing is the third point, connecting the USB interface and the main control chip, which requires a sufficient understanding of the software and hardware environment of the above two points.

We can mobilize operating system and chipset designers who are proficient in this protocol, plus the backbone of the chip storage project team to form a joint project team.”

Rebs slapped his thigh and was settled.

When he walked out of Qiu Lianjun's office, Rebs shook his head helplessly. He had already thought about the joint research project team. He just used Qiu Lianjun's mouth to say it. He was the first to come and often had to keep a low profile to unite most of the people.

The next day, Rebs held a cross-company department meeting, Huaxin Technology CPU Division, Huawei Software Operating System Division, and Huaxin Technology Chip Production Division attended the meeting.

Before entering the venue, everyone attending the meeting asked to sign a confidentiality agreement under the witness of security personnel.

This is what Wang Anran clearly requested. There is no way. The technical content of the U disk is too low. What is valuable is just an idea. Wang Anran doesn't want to attract a large group of opponents who are first to register patents because of the leak.

Lang Ke in his previous life has been entangled in the patent for the U disk for a long time.

The next step is to establish the U disk project team. The entire project is led by the chipset project team of the CPU business department of Huaxin Technology, and the chip production project department and operating system project department sent elite forces to cooperate.

At the meeting, Rebs successfully promoted his project team leader, Xiao Jin, who was also from Wuhan University, as Rebs.

"Mr. Wang gives me three months, and I give you only two and a half months. How about it, Xiao Jin, do you dare to answer?"

"Why don't you dare! It's just a USB memory. Senior brother, you only need to give me two months."

Rebs stood up and said, "Okay, Xiao Jin, since you are so confident, this military order has been made. Although we are also from Wuhan University, we will talk about the ugly words first. If it is not completed, I will resign from Mr. Wang, but before, I will have to drive you away."

“…”

Rebs had no choice but to convince the public, he had to make achievements first. He didn't want to lose Waterloo in his first project.

...

Just as Rebs was busy arranging the research and development of the U disk project, Wang Anran was not idle either. He set a goal for the chip 3D stacking project team to stack ten layers.

This is also a design difficulty. Compared with the two-layer stacking, the design and wiring of the entire logic circuit needs to be started over.

"Renjie, the tenth layer is the starting point for us to start commercial use. There is no way. We may maintain the 1.5-micron manufacturing process and planar transistor arrangement for a considerable period of time, which will make our costs uncompetitive in front of our competitors."

Lu Renjie thought for a while and said, "In terms of manufacturing, we have advanced physical vapor deposition production equipment provided by Toshiba, stacked to ten layers, and we also need relevant experimental data to support it.

The difficulty now is to stack ten layers, so on a layer of plane, three-dimensional metal wiring will make the wiring of the entire plane extremely crowded.”

Lu Renjie reported on the project situation. In his tone, he was both yearning for the ten-layer stacking technology and a little nervous.

Wang Anran refused to argue, and this situation still needs to be forced.

"Renjie, your task is not only to solve the ten-layer stacking technology, but also to add the 3D chip design part to the corresponding eda design software. I have arranged for the personnel of the eda project team to join your team."

In a sense, eca software is the foundation of the company.

Because every technological breakthrough of the company can be integrated into EDA software, the subsequent chip design does not require the designer to be proficient in every technical indicator of the 3D chip.

All he needs to do is to directly retrieve this part of the functional components from the EDA software.

After arranging the storage of 3D stacking chips, Wang Anran took the time to go to the Finfet project team. Finfet3D transistor stacking is the direction of future memory chips.

But the conditions are not met yet.

The bism mathematical model led by Ji Xiaoqing is still advancing, and this is the fundamental one.

"Xiaoqing, what's the difficulty?"

"Bism mathematical model requires a large amount of experimental data to support, and whether our detection equipment is accurate or insufficient, Mr. Wang, can I apply for a batch of high-precision detection instruments from the company?"

Wang Anran nodded.

"Of course, Xiaoqing, you draw a list of equipment and I will approve it for you today."

The next day, Ji Xiaoqing handed over the bill to the material procurement team of the Supply Chain Department.

Team leader Nian Jiamin took the order note and asked the prices of major suppliers as soon as possible. After getting the results, he took a deep breath.

He sent the quotation to the Finance Department. After seeing it, he saw it by Director Gu, shook his head and directly took the note to find Rebs.

"Mr. Lei, Mr. Wang approved another equipment purchase list of 70 million US dollars, but our account is less than 30 million US dollars!"

Rebs felt his scalp tingling. The first financial crisis since the establishment of Huaxin Technology has happened in his hands...
Chapter completed!