The next day, Monday, January 27th.

Evans, who confirmed that neither the Lyons nor Danforth had moved, returned to Pasadena as usual.

Carl and the school's patent specialist disagreed on some of the terms of the patent, and Evan needed his opinion. After all, he is the main owner of the patent.

After rushing to the lab, Evan listened to what Carl had to say.

"Evan, I think we should steer clear of FEDs. The reason is that, according to the information I have found, a device based on field effects has been patented by Julius Lilienfeld as early as 1925. ”

"I think we just need to bring the key innovation of point contact to the table. ”

Evan thought about it and decided to support Carl's opinion, which would reduce the risk of being picked on by the patent office and make it easier for patents to be granted.

And, in terms of business value, point-contact transistors aren't really good. It's just the beginning, there's a lot of work to be done, and Evan doesn't want to waste too much time on that.

After consulting with Layton, Evan decided to publicly present their results to the school's professors in the evening. As for who to invite, both felt that the more the better. So, having made the necessary preparations, Evan and Layton split up on the phone.

In the afternoon, Evan went to the "Theoretical Physics" class. This time, the class was more normal, and Evan was not specifically targeted by the professor.

Since Evan's lecture on "Many-Worlds Interpretation" in class, Professor Anderson has completely given up on the idea of taking him as a student.

After the course, Evan approached Professor Anderson and invited him to attend a small presentation in the evening.

Professor Anderson, though not very welcoming to Evan now, accepted his invitation.

He wondered what kind of research made Evan reject not only himself but also Pauling in the Department of Chemistry and Chemical Engineering.

Seven p.m., Warren-Leiden Solid State Physics Group Laboratory.

The professors who accepted the invitation walked into the laboratory one after another.

Most of these people were teachers from the Department of Physics, Mathematics and Electrical Engineering, but there were also many teachers from other departments, and Evan even saw a few people wearing clothes with JPL lettering.

Evan was sure that he didn't invite anyone from JPL, and that it was supposed to be a relationship with Leiden.

Of course, Evan did not forget to invite the head of the department, Professor Watson, and the dean, Mr. Dubridge, who gave them a lot of support.

The two gentlemen were very friendly and came to the laboratory in their busy schedules.

After a brief greeting with the dean and the others, seeing that everyone had arrived, Evan clapped his palms to attract everyone's attention and announced the start of the public display.

Evan personally presided over the experiment and did not give this opportunity to Layden.

"Gentlemen, since 1834, when Faraday experimented with silver sulfide and discovered that its resistance decreases with rising temperature, semiconductors have come into the attention of researchers. Later, the rectification effect of semiconductors was discovered, which made semiconductors get more attention......"

After a brief introduction to the history of semiconductor research, Evan began to talk about their work.

"At this moment, we will show you another new application of semiconductors. Everybody look at it......"

Evan first walked through their homemade device, and then demonstrated the amplification effect of the device.

"Wow!"

When they saw that the collector current clearly displayed a much larger value than the emitter current, everyone present showed exclamation expressions.

Several professors with advanced knowledge of electrical engineering were particularly excited, and they understood how useful this little thing was, not to mention that the power-hungry, hard-to-maintain vacuum tube was about to be swept into the garbage.

The few people who came from JPL also showed a lot of interest.

"This device, we named it Point-contact transistor, the point contact represents its structure, and the transistor is our new coined word, which is based on its resistance conversion characteristics (trans-resistor). ”

"We'll be publishing an article in PhysicalReview about how point-resistant transistors work, so you can keep an eye out for it then. ”

Because it is only a demonstration of the results, Evan skipped the principle part and did not say much.

When Evan finished his introduction, Dean Dubridge took the lead in applauding.

"Evan, I didn't expect you guys to make it so quickly. ”

Dubridge patted Evan on the shoulder affectionately and said, "I'm even more surprised that you would think of showing your results publicly." ”

Evan said, "Dean, we are doing this for a purpose. ”

"The development and research of transistors cannot be achieved by me and Leiden. We need more people, not only for theoretical research, but also for engineering. ”

Dubridge nodded thoughtfully, "So, you hit these people with your idea?"

Evan nodded generously and acknowledged, "I hope my plan will not be in vain, after all, it is not a small risk to change careers." ”

"People always want to stay in their comfort zone, and they don't want to change until they have to. ”

As for Evan's other purpose, which is to preemptively announce the results on a small scale and erect the flag of the first person to be the first person to transistor in response to possible unfair competition from Bell Labs, he will not say it explicitly.

After the experiment was demonstrated, some people who had seen the excitement left on their own, and those who were really interested in transistors naturally stayed for the end.

As a result, the original exhibition of achievements became an academic exchange symposium.

At the panel, Evan gave a prophetic vision of the future of transistors.

"By replacing vacuum tubes with transistors, the University of Pennsylvania's electronic general-purpose computer doesn't need to occupy a building, and its size and power consumption can be reduced by hundreds of times, or even more. And its computing power can be increased by a certain percentage every once in a while. ”

Evan's imagination has been recorded in his diary by many people, and some have even appeared in biographies.

It was called the original version of what later became "Warren's Law".

The day after the presentation, the patent application for the point-contact transistor was officially filed, on the fourth day, the revised article was stamped and mailed, and on the fifth day, two newcomers were added to the solid-state physics group.

On this day, Evan and Layton were called to the dean's office.

"You may be seated!"

Dubridge smiled and said to the two, "There are two things that have called you here. ”

"First ......of all," he said, looking at Leiden, "Dr. Leiden, we have decided to hire you as an assistant professor in the Department of Physics, Mathematics and Electronic Engineering, and depending on the situation, to associate professor within three years at the latest." ”

"You...... What do you think?"

Layton didn't seem surprised, smiled lightly, and said, "It's an honor." ”

"Very good!" Dubridge nodded happily, turned to look at Evan and said, "Evan, the institute has decided to increase its support for the solid-state physics group, and the group will become a formal laboratory, and the director of the laboratory will be represented by Professor Watson for the time being, and the specific affairs will be decided by you and Leiden." ”

"Therefore, you proposed to invite experts in solid-state physics and semiconductor research from all over the country to visit the school to contact transistors, and you will organize it yourself. ”

Evan nodded and said, "That's fine!"