Rebirth of Northern Technology

February 1995.

327 Treasury bond futures event.

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Just after the Spring Festival, the smoke from the firecrackers has not yet dissipated, and a product appraisal meeting is about to be held in the building of the Testing Institute.

The president of Liyun Company, Hao Yunli is at the end of the conference table, doing the final inspection.

People are still entering the conference room, and all the chairs are full. The students of the Department of Student Union have gone out to move chairs.

For this appraisal meeting, almost all the leaders and teachers of the testing institute were present.

Hao Yunli graduated from the College of Testing, and this one and only achievement was repeatedly promoted by the department. Her picture is posted on the side wall of the hall on the first floor.

Moreover, Hao Yunli is also a guest professor in the courtyard.

In 1994, the School of Testing and Testing opened a new undergraduate major, Semiconductor Testing. Last year they brought the MEMS laboratory back.

The Institute of Semiconductors put more energy into larger areas, such as manufacturing process, technology, equipment, materials, and large-scale integrated circuit design.

In this case, after friendly negotiation, the once-popular MEMS laboratory objects returned to their original owners.

Everything is back to where it was four years ago.

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Liyun Technology’s main product, CMOS camera, also belongs to the category of sensors, so her company is fully supported by the detection system.

Regardless of personnel or technology, Liyun Company is regarded as the direct line of the College of Testing.

Hao Yunli once again felt the warmth of home in the freezing Northland, even though most of her teachers and classmates had no relationship with her.

Today's star product is a CMOS sensor with UXGA (1600x1200) resolution. It is installed in a large box with a computer connected to it. Every time it receives an instruction, it can project the captured image onto the screen.

The appraisal meeting has not officially started, the demonstration has already begun. A group of curious young teachers surrounded the computer screen. Watching Hao Yunli keep operating.

"Just be quiet, please be quiet, everyone will return to their seats."

Director Zhao picked up the microphone, and the appraisal meeting was about to begin.

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The CMOS image sensor has the same basic principle as the CCD sensor. All use photosensitive elements as the basic means of image capture, and the core is a photosensitive diode (photodiode), which converts changes in light intensity into electrical signals.

The main difference between them is the signal reading and processing process.

CCD has only one output node, all signals are read out at the same time, the consistency of signal output is very good, but the bandwidth required to read out all the information at the same time is larger, and the power consumption is higher.

Since the CCD itself cannot directly convert analog signals into digital signals, a special analog-to-digital conversion chip is needed for processing, and finally in the form of a binary digital matrix, it is output to a special DSP processing chip and converted into image data.

The peripheral circuits and auxiliary circuits are complicated, and the production processes of different functional modules are also different.

More importantly, the CCD solution is an analog signal processing process until it is converted into data. It is very different from the digital chip and has a very low integration level.

The area of ​​the CCD sensor is almost the same as the size of ordinary film.

The process is not universal, which naturally brings high costs. If the cost is high, the price will be high, and the sales will be low. Because manufacturers cannot recover costs quickly, technological progress has been slower and a series of chain reactions have occurred.

The CMOS process is different. Each pixel has an independent signal processing unit, and the optical signal is directly converted into a digital signal. The processing of digital signals is much simpler than that of analog signals, and the power consumption of the chip is greatly reduced.

Subsequent analog-to-digital conversion and other auxiliary circuits are no longer needed, and the complexity of the solution is greatly reduced.

As long as the process is improved, the pixel density will naturally increase, and the cost will be reduced accordingly.

Of course, the CMOS process is not without its shortcomings.

In order to integrate the amplifier and analog-to-digital conversion circuit, each image point is composed of a photosensitive diode and three transistors. Compared with the CCD, the effective area of ​​the photosensitive diode is greatly reduced, and the light sensitivity is reduced.

Because the magnification of each pixel is not synchronized, it causes noise. Due to the high level of integration, the components are relatively close together, and additional noises are also caused. All these problems need to be solved step by step.

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When Cheng Yongxing entered the venue, the meeting had already started for more than an hour. In the morning, he completely forgot. It was Wang Chen who drove him here just now.

"Where did you go?"

Cheng Yongxing found an unmanned seat in the back row, with Feng Yan in front of him. The classmates in the ice city all came to join in.

"I thought you were not coming today."

"How can I be absent from such an important meeting. I drove over, and the road was a bit blocked, so I was late."

Feng Yan turned his head back, and the next introduction was about to begin.

She didn't understand at all, what Cheng Yongxing's mouth meant.

Maybe Hao Yunli is more important.

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The demonstration work continues.

A staff member picked up a yellow box the size of a lunch box, and a lens stuck out in the middle.

This is a temporary digital camera.

She picked up the ugly box, pressed the button on the side a few times, and then took out a 3-inch floppy disk from the side of the box. Someone in the room stood up, and they guessed the next step.

Sure enough, the floppy disk was inserted into the computer, and the faces of the participants appeared on the screen.

"Slap, slap, slap."

Applause rang from the back row of the conference room, and everyone's eyes were attracted. It turned out that Cheng Yongxing, who was late, was applauding.

Under his lead, everyone also clapped.

Cheng Yongxing can't confirm whether the emergence of CMOS digital cameras has his own credit. Maybe he mentioned it a few years ago, but he didn't expect to see the real thing so soon.

Digital cameras dominated the market for more than ten years before smart phones came out. Cheng Yongxing bought six or seven digital cameras back and forth, and had to change one every two years because the pixels were gradually increasing.

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Driven by him, the atmosphere in the meeting room became warm.

The appraisal meeting soon came to an end.

The invited experts are not hesitant to words about the new image sensor, and various good adjectives and attributives have been deducted.

Industry leader, the world's first industrial-grade two-megapixel image sensor, international leader, world-class, filling the domestic gap. Etc., etc.

But after talking for a while, there was no more words.

Recently, the University of Technology has made many innovations, and achievements at this level are nothing. Hao Yunli is also an influential figure, I am afraid that only Nobel Prize-level results can satisfy everyone.

"Who else wants to speak? No more?"

In fact, many people want to say something on this occasion. After all, there are not many opportunities for the director and principal to be present.

"Let Xiaocheng say a few words! He is our industrial expert."

Dean Xi called Cheng Yongxing's name. It was the first time that Cheng Yongxing took the lead in applauding.

Professor Wang did not come today and he was hospitalized again, so he represented his brother's unit and the former teacher to cheer his former disciples.

"Have you applied for a patent?"

Cheng Yongxing took the microphone that was handed over.

"They have applied for them. There are more than 300 patents in CMOS."

Hao Yunli nodded.

CMOS is a brand-new technical route, basically every step is a patent. Liyun Technology has initially established a patent moat.

"There are dozens of patents on digital cameras."

Digital cameras have not yet entered the mainstream market. Due to the high price and low pixels, it is just a plaything for some tech enthusiasts. It has not been taken seriously by mainstream camera manufacturers. It can be regarded as a patented blue ocean.

"This is an epoch-making product."

Cheng Yongxing paused to give everyone time to think.

"Maybe some people do not approve of my comments, because CCD cameras have long existed. CMOS sensors can only be regarded as another technical route, at best it can be regarded as a product and technology upgrade, and should not be called an epoch-making title."

Cheng Yongxing looked around and everyone was waiting for his explanation, including Hao Yunli.

His predictions, his reputation, especially in the University of Technology, belong to the first level of mythology. All kinds of legends, rumors, true and false, circulated on campus.

The Youth League Committee also deliberately organized several big discussions among the students to abandon superstition. But in the teaching staff, many people have their own judgments.

If he says that the sky and the earth will perish, it is estimated that someone will jump off the building soon.

"I use a similar project to compare, and everyone will realize its value."

It's a pity that everyone is waiting for the answer, and no one is praising it.

"That's the blue LED!"

With the unraveling of the mystery, the quiet conference room was filled with buzz in vain.

Everyone understands the story of blue LED, that is the starting point of everything.

The Optoelectronics Department, the most successful school-run enterprise of the University of Technology, originated from a simple process improvement and product upgrade.

"So I say it is epoch-making!"

This evaluation exceeded everyone's expectations, even Hao Yunli's expectations.

Blue LED is a key step and the last link in the industrialization of LEDs. If the CMOS camera has such a status, then its future is almost limitless.

Liyun Technology focuses on various MEMS semiconductor sensors. The CMOS sensor is just one product in her plan. Other MEMS sensors have also invested resources and manpower.

How to really have such a big market as Cheng Yongxing said, all plans need to be adjusted.

Keep him here and have a talk.

The two have not been alone for a long time. One reason is that they are all busy, and the other reason is that they are all busy.

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"Anyone else want to speak?"

Director Zhao covered the buzzing discussion with the sound of the speaker.

A few hands were raised up, and then put down again. This is a product appraisal meeting, not a Q&A meeting.

Hao Yunli was not the one answering questions either.

"To be honest, I don't know how to write the conclusion."

Director Zhao's words caused everyone to chuckle.

"What I regret most now is that I invested less when financing. The proportion is too small."

At that time, the testing department invested 50 million yuan, and many people still have a bit of opinion. But now it seems that this is simply a big bargain.

"Don't be obedient here, we didn't invest a penny."

Director Xi interrupted Director Zhao's show off.

"When is your next round of financing?"

Someone in the room shouted loudly.

"Quiet! Quiet! Don't digress, OK."

Director Zhao raised his face again. Rebirth of Northland Technology latest chapter address: https://www.wuxiaspot.com/book/128175.htmlRebirth of Northern Science and Technology Full Text Reading Address: https://www.wuxiaspot.com/read/128175/Rebirth of Northland Technology txt download address: https://www.wuxiaspot.com/down/128175.htmlRebirth of Northland Technology Mobile Reading: https://m.wuxiaspot.com/read/128175/For the convenience of reading next time, you can click \"Favorites\" below to record this reading (Chapter 623, 2 megapixels), next time you open the bookshelf Can be seen! If you like "Rebirth of Northland Technology", please recommend this book to your friends (QQ, blog, WeChat, etc.), Thank you for your support! ! (www.wuxiaspot.com)