3D stacking can greatly reduce production costs.

It is used on memory chips, which has an advantage, that is, even if the chip is partially defective, it can also shield this area on the main control chip, and the consequence is that the storage capacity is only a little smaller.

This is different from the logic chip, although the logic chip is also set up with some redundant transistors to prevent damage to some logic circuits, and the bypass devices are set, but if the defect occurs in the main control logic circuit, it is only to declare the chip scrapped.

Therefore, on memory chips, there is basically no problem of yield rate, as for applications, it is too much.

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

These Huaxin technologies do not do anything.

To do it, do what is not available in this world.

A flash drive based on the USB interface, Wang Anran has long wanted to do it, and the conditions are just right at this time.

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

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

There are four leads of the USB interface, two are power supplies and two are data, and the I/O interface and data transmission protocol can be designed according to his data definition.

Such a small project can't be presided over by Chairman Wang Da himself, and a phone call to Rebus, the project is decided.

It's very simple for Wang Anran, a scholar, but in the eyes of others, he doesn't see it that way.

This is a project arranged by Mr. Wang himself, and naturally Rebus paid enough attention to it, and he came to the office of Qiu Lianjun, the technical director of the head office, at the first time.

"This is the design task book personally ordered by Mr. Wang, take a look!"

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

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

They are both people who understand, Rebus and Qiu Lianjun know very well, and they can see each other's amazement in their eyes.

"Wang always wants to disrupt the entire mobile storage market, and I seem to have seen the end of the floppy disk market. ”

Qiu Lianjun nodded and said, "There is no one of the best product managers in the world, and the boss makes us very stressed!"

Rebus let out a long sigh, and he was deeply touched by the taste of being roasted on the fire.

"Mr. Wang is now handing over the task to us, Mr. Qiu, what is your opinion?"

Rebus's attitude made Qiu Lianjun very satisfied.

"USB memory involves three aspects, one is the memory chip, the most mature flash memory chip is the NAHE FLASH storage structure proposed by Toshiba.

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

The most important thing is the third point, the main control chip that connects the USB interface and the memory 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. ”

Rebus slapped his thigh and it was decided.

Walking out of Qiu Lianjun's office, Rebus shook his head helplessly, the joint research project team was something he had thought about a long time ago, but he just said it through Qiu Lianjun's mouth, he was a newcomer, and many times he had to keep a low profile in order to unite most people.

On the second day, Rebus held a cross-company departmental meeting, which was attended by the CPU Division of Huaxin Technology, the Operating System Division of Huawei Software and the Chip Production Division of Huaxin Technology.

Everyone present at the meeting is required to sign a confidentiality agreement in the presence of security personnel before entering the venue.

This is Wang Anran's clear request, no way, the technical content of the USB flash drive is too low, the value is just an idea, Wang Anran doesn't want to provoke a large group of opponents who preemptively register patents because of leaks.

In his previous life, Lang Ke was entangled in the patent of the USB flash drive, but he was entangled for a lot of time.

The whole project is led by the chipset project team of the CPU Division of Huaxin Technology, and the chip production project department and the operating system project department send capable forces to cooperate.

At the meeting, Rebus successfully promoted his project team leader, Xiao Jin, who is also from Wuhan University, and Rebus.

"The time Mr. Wang gave me is three months, and the time I give you is only two and a half months, how about it, Xiao Jin, do you dare to take it?"

"Why don't you dare! It's just a USB flash drive, senior brother, you just need to give me two months. ”

Rebus stood up and said: "Okay, Xiao Jin, since you are so confident, this military order is established, although we are also from Wuhan University, but the ugly words will be said first, if it can't be completed, I will resign from President Wang, but before that, I have to fire you first." ”

“......”

Rebus can't help it, if he wants to convince the public, he has to make a performance first, and he doesn't want to lose Waterloo in the first event.

......

Just when Rebus was busy arranging the research and development of the U disk project, Wang Anran was not idle, he gave the chip 3D stacking project team, and set the goal of ten layers of stacking.

This is also a significant increase in design difficulty compared to a two-layer stack, and the entire logic circuit design and routing needs to be restarted.

"Renjie, the tenth layer is the starting point for us to start commercial use, no way, we may maintain the 1.5 micron manufacturing process for a long time, planar transistor layout, will make our cost uncompetitive in front of 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 that the ten layers are stacked, so on one plane, the three-dimensional metal wiring will make the wiring of the whole plane crowded. ”

Lu Renjie made a report on the situation of the project, and in his tone, he was both yearning and a little apprehensive about the ten-layer stacking technology.

Wang Anran was noncommittal, this situation still had to be forced.

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

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

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

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

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

However, the conditions are not yet available.

The BISM mathematical model led by Ji Xiaoqing is still advancing, which is fundamental.

"Xiaoqing, what's the difficulty!"

"The BISM mathematical model needs a large amount of experimental data to support, and our testing equipment is not enough in terms of accuracy, Mr. Wang, can I apply to the company for a batch of high-precision testing instruments. ”

Wang Anran nodded.

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

The next day, Ji Xiaoqing handed over the approval slip to the material procurement team of the supply chain department.

Nian Jiamin, the team leader, took the approval slip and inquired about the prices of major suppliers at the first time, and after getting the results, he took a deep breath.

After sending the quotation to the finance department, Director Gu shook his head and directly found Rebus with the approval slip.

"Mr. Lei, Mr. Wang approved a $70 million equipment purchase list, but our account is already less than $30 million!"

Rebus felt his scalp tingle, since the establishment of Huaxin Technology, the first financial crisis has occurred in his hands......

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