Chapter 385

"This one here is a high-density plasma etching machine, this one is a magnetron sputtering system, and this one is a scanning electron microscope. Needless to say, you should all know these."

Except for the mocvd, all the other instruments and equipment in the laboratory are common in the laboratory.

Not to mention Gu Lu, even Chen Mo could recognize him at a glance.

Chen Mo’s graduation project is to study the relationship between the bandgap width of wide-bandgap semiconductors and their specific physical and chemical properties.

And try to express the relationship between the two using functions or other mathematical languages.

In addition to the basic material gan wide bandgap semiconductor, Chen Mo also needed to use some equipment in the experiment to collect data.

Scanning electron microscope, probe station!

These are the two pieces of equipment that Chen Mo needs to borrow.

By chance, when Director Zhang took the scanning electron microscope to the location, he found that one of the microscopes was empty.

Director Zhang patted Chen Mo on the shoulder and pointed to the empty seat.

"Go to the scanning electron microscope and I will teach you the specific operating details of this instrument."

A scanning electron microscope is very expensive to build.

Chen Mo had done this several times before when he was a graduate student at Zhejiang University.

But this is the first time that a scanning electron microscope has been used to observe wide-bandgap semiconductors.

Some basic parameter settings of the microscope are not clear.

This requires some guidance from Director Zhang.

Director Zhang explained to Chen Mo while operating, "When observing gan wide bandgap semiconductors, the field depth we generally use is 3.2 nanometers. The function refers to choosing a thickness of 0.85 nanometers and amplification..."

Scanning electron microscopes can obtain information on the micromorphology of wide-bandgap semiconductors by collecting secondary electrons and backscattered electrons.

Through the collection of x-rays, information on the chemical composition of wide-bandgap semiconductors can be obtained.

It is a very practical device.

Under the guidance of Director Zhang, Chen Mo got started quickly.

It can be done by yourself in just a few minutes.

"Then you continue to practice here. There are still people over there at the probe station. I will take you to operate it later." Director Zhang patted Chen Mo on the shoulder, then stood up and walked to the high vacuum electronics machine next to him.

Gu Lu stood in front of the beam evaporator.

"Your student has a good understanding!" Director Zhang praised with a smile.

Gu Lu smiled slightly, "After all, he is a doctoral student. It would be abnormal if such a simple operation takes a long time to learn."

Gu Lu ignored the topic, pointed at the high vacuum electronic water evaporator in front of him, and asked with a smile, "Director Zhang, have you also improved this equipment?"

"I really can't hide anything from you." Director Zhang touched his bald head and laughed, "This equipment and that mocvd were modified together, Gu Lu, let me tell you..."

Director Zhang began to introduce to Gu Lu the specific modification details of this equipment.

Gu Lu listened carefully and nodded frequently.

This knowledge was something he had rarely been exposed to before.

He only knew what the internal structure of the prototypes of these devices was and what their operating mechanisms were.

But when faced with this modified equipment, my eyes went dark.

While Director Zhang was chatting with Gu Lu, a researcher hurriedly walked over to Director Zhang holding a folder.

"Director Zhang."

The researcher wore round-rimmed glasses and a Mediterranean hairstyle. Because he was wearing a mask, Gu Lu could not tell his specific age.

But judging by his voice, he must be in his thirties.

"Oh, it's Professor Fang!" Director Zhang's eyes fell on the researcher, and he introduced Gu Lu with a smile, "This is Professor Fang Qing from our semiconductor research center. He is mainly responsible for semiconductor doping control.

research content.”

"Professor Fang, let me introduce to you. This is Professor Gu Lugu from the School of Mathematics next door."

"Hello hello!"

"I have admired you for a long time!"

The two simply shook hands.

"Professor Fang, why did you come to see me?" Director Zhang asked with a smile.

"Oh." Professor Fang handed the folder in his hand to Director Zhang and said in a deep voice, "Director Zhang, the latest measurement results are out."

Director Zhang found the folder, opened it and glanced at it, frowning tightly, "Isn't it still possible?"

Professor Fang smiled bitterly and shook his head, "It still doesn't work. We still haven't found evidence to prove the lattice position of the c impurity in gan."

"Alas!" Director Zhang sighed after hearing this, "All this hard work turned out to be in vain!"

Gu Lu looked at the two people who were sighing, hesitated and asked, "Director Zhang, have you encountered any problems?"

Director Zhang did not hide anything.

"To be precise, it's not that our research institute has encountered a problem, but that the entire field of wide-bandgap semiconductors has encountered a problem."

Director Zhang began to tell Gu Lu the details of this problem.

In the current semiconductor field, doping control is a key scientific and technical issue in the development of nitride semiconductor materials and devices.

Obtaining semi-insulating GA through c-doping is currently the mainstream method for developing gan-based electronic devices.

However, as a group IV element, the c impurity in gan has amphiphilic characteristics. It can replace either n atoms or ga atoms, or form a complex with other impurities and defects, making the doping mechanism of c in gan very complicated and has become a problem in recent years.

It is one of the focus issues in the field of nitride semiconductor electronic materials and devices.

Therefore, determining the lattice position of the c impurity in gan is a difficult problem that needs to be solved urgently.

As one of the well-known domestic research institutions in the field of wide-bandgap semiconductors, the Semiconductor Research Center of Yanda University has naturally launched an attack on this problem.

But the result...

Just like what Gu Lu saw just now, the measurement results failed and the technical problem still exists.

Director Zhang and Professor Fang, who was responsible for this part, sighed.

After hearing this, Gu Lu touched his chin and remained silent, thinking about something.

A few dozen seconds later.

Gu Lu looked directly at Director Zhang, smiled bitterly and said, "Director Zhang, if I say that I can solve this problem, would you believe it?"

Director Zhang was obviously confused.

Because Gu Lu's words were obviously not what Director Zhang expected.

Or rather...

Director Zhang never thought that these words would come out of Gu Lu's mouth.

Director Zhang was stunned for more than ten seconds before he swallowed hard and asked, "Gu Lu, are you serious? Do you really have a way?"

"I'm 50% sure." Gu Lu didn't give a complete guarantee.

Because he is not sure whether that method can be applied to the field of wide bandgap semiconductors.

50% sure!

This number seems to be very high in Director Zhang's opinion.

It's worth a try.
Chapter completed!