Chapter 457 A world of difference
After spending some time arranging the relevant affairs of the 6011 war, and starting everything, Gao Zhendong decided to go to the 1274 factory to have a look, and asked the 12th Machinery Department to inquire. Ask about the supporting conditions of some photolithography machines.
As Gao Zhendong walked outside the office building, he greeted the comrades who came up and down.
"Hello, Mr. Gao..."
"Hello, Director Gao..."
"Lao Gao, are you going out?"
People who greeted him had various names. People who followed him at different times had different customary names.
Until I arrived outside the office building, I heard a relatively rare sound.
“Director Gao is good.”
Who the hell is this? It's rare to call yourself that, but the voice is quite familiar.
Gao Zhendong looked up and saw that it was Liu Haizhong.
I am leading two comrades from the security department, both wearing red armbands, probably on patrol.
Liu Haizhong's identity has been changed, but his position is not. There is a carrot and a hole, and there is no way to free or create one for him. Therefore, for the time being, he is still responsible for patrolling with his two young comrades. .
Gao Zhendong nodded, said hello, got in the car and ran to Factory 1274.
In the car, he turned to Xie Jianye who was going out with him and said: "Old Xie, keep an eye on this person. Don't let him enter the third factory even half a step."
Our Comrade Xie Jianye is now the chief of the fifth unit of the Internal Security Section of the Security Department.
Hearing Gao Zhendong’s words, his eyes flashed and he nodded in agreement. Although I don’t know why Gao Zhendong said this, he is right.
After arriving at Factory 1274, he went straight to find Fang Yinghong’s workshop.
Fang Yinghong is here to support them in transforming the diffusion furnace, so where she is must be the location of integrated circuit process research.
I rushed all the way to the outside of the workshop and was stopped by the gate guard.
Gao Zhendong and Xie Jianye took out their work certificates. After the other party verified it, they smiled and said: "It turns out you are Chief Engineer Gao of the No. 3 Rolling Plant. Our factory director and chief engineer often mention you, as does your Comrade Fang Yinghong here. I am the Security Office of the 1274 Factory The deputy director, surnamed Tang, happens to be on duty here today. "
It seems that 1274 takes this matter very seriously. The deputy director of the security department was sent to the craft workshop to check the gate.
Although the duty is rotated, but it can be rotated to the deputy director, it means that the standards given here are very high. Maybe it is not a requirement of the factory but the deputy director himself actively requested it, but then It explains the problem even more.
"Hello, Director Tang, we came here today to see the status of process research, and by the way, express condolences to the comrades working here on behalf of our factory, haha."
Director Tang The leader was very talkative: "Then you are right to come today. It just so happens that there are quite a few people here today, and comrades from other units are also here. I heard that they were recommended by you. We, General Engineer Lu, are also there."< br>
Gao Zhendong was surprised, someone else recommended him? Then you have to take a look.
A few people were joking and walking inside.
When I walked into the workshop, it was a busy scene. A bunch of people, including Mr. Lu and Fang Yinghong, were gathering together to look at something.
Director Tang walked up to greet Mr. Lu: "Mr. Lu, Mr. Gao from the third rolling mill is here."
A group of people put down the materials in their hands and turned around with surprises on their faces. .
"Mr. Gao, what brought you here? Do you know we have a test here today?" Mr. Lu said with a smile.
Gao Zhendong glanced over and saw a few people who had not expected to appear here among the people who turned around.
Gong Lu from the Institute of Guidance and Research, and his classmate Lin Lianwei.
Gao Zhendong knew that they were responsible for the guidance subsystem of the infrared air-to-air bomb. They came here because he mentioned it before when he guided them to modify the seeker of Thunderbolt-1, If you have problems with the production of infrared photodiodes, you can ask Factory 1274 for help.
It seems that this is what they are busy with. No wonder Director Tang said that there are people in the workshop whom he recommended.
He quickly greeted them, and then said to Mr. Lu: "No, I just have free time today, so I came to see how the craft research is going. I also took the opportunity to be my mother-in-law's family and came to express my condolences to Sister Fang and the others. I didn't expect to arrive early. What a coincidence. What are you busy with?"
Mr. Lu said with a smile: "Mr. Lu and the others want to make a batch of diodes. The process requirements are slightly special. Just in time, the diffusion furnace modification is also here. It has reached a certain stage, so I used this new stove to trial-produce a batch for them.”
Mr. We really can’t find a manufacturer that meets our process requirements. This time they built this new diffusion furnace, and the process control range just covers our needs.”
His name is Mr. Gao, which means Cong Gao. Zhendong started from the perspective of serving as the deputy chief engineer of Thunderbolt-1. Gao Zhendong didn't expect this unexpected surprise, and he was very happy. He originally mentioned it casually but didn't expect it to be useful. He didn't expect to have such a harvest.
"That's great, how is the situation now?"
Mr. Lu smiled: "The infrared photodiode has been developed, and the preliminary results seem to be pretty good, but the most important thing is the sensitivity. It will take a long time to test, but the results should be available soon.”
This is a single infrared photodiode, not a focal plane array, so the blind element rate, Parameters such as these do not exist, and there is no need to use technologies such as photolithography. Just use a suitable diffusion process to diffuse the specified elements to a certain side of the mercury cadmium telluride crystal, and then conduct lead-out packaging.
“How is the consistency of the crystal composition?” Gao Zhendong asked smoothly.
“Very good, the composition unevenness of the main control elements is below 1%, which is enough for use.” Lu Gong said with a smile.
Neither of them said what kind of crystal it is, but it is still important to pay attention to. For 1274, the mercury cadmium telluride infrared photodiode is processed with supplied materials. It just needs to be processed in accordance with the process requirements proposed by the Institute. The specific original They don't know what the material is, and they can't ask.
Gao Zhendong nodded: "That's good. Have you even brought your sensitivity testing equipment?"
The equipment of the 1274 factory cannot support this kind of more professional test. Generally speaking, they are sent back to the Research Institute for testing, but looking at them all gathered here, it seems that they can be tested on site.
Mr. Lu said with a smile: "The comrades from the Guidance Research Institute have relatively high time requirements, so they brought their equipment and testers over. Over there, we specially designated a section in the workshop Give them the land."
Lu Gong also agreed: "Yes, I also want to thank the comrades of Factory 1274 for their great help and various conditions."
Gao Zhendong laughed, and he was very proud of the fact that several of the projects he led had such a dreamy connection.
"Then let's just wait for the results. This is hunting down rabbits, testing both subjects at once."
Everyone laughed together, talking about technology question while waiting for the test results.
The reason why the sensitivity test is slow is that most infrared photoelectric sensors have different sensitivities under different ambient temperatures. The lower the temperature, the higher the sensitivity. This is why good infrared equipment is generally All because of refrigeration.
So in order to master this characteristic curve, its sensitivity needs to be tested at different temperatures.
At the same time, in order to verify the repeatability of the process, it is necessary to test the performance of multiple batches of diodes, which takes longer.
Gao Zhendong arrived at Factory 1274 at around 2 p.m. Even though they had already conducted part of the test in the morning, Gao Zhendong didn’t wait until around 3 p.m. or 4 p.m. to get the experimental results.
Lin Lianwei rushed over with the data. At this time, the only two people present were Gao Zhendong and Mr. Lu. Even Mr. Lu from Factory 1274 retreated far away from the workshop with his people. They only need to wait for the qualitative judgment of the results; they cannot listen to quantitative data.
"Mr. Lu, Gao, the data is very good! It's so sensitive!!!"
Mr. Lu looked happy: "Quick, show me!"
< br>
After taking the analysis results, I found a very beautiful curve. At the temperature of 140k, it rose slowly to 170k, and then the increase suddenly increased at 200k.
"Great! On average, the noise equivalent temperature difference of 140k is 15mk! It is 19mk at 180k, and it still remains at 30.5mk at 200k! Great!"
As for the noise below 140k They don't have such good refrigeration equipment, so they can't measure the temperature, but it's enough. This data is much better than the refrigeration lead sulfide they have now. It's not a slight improvement, but a huge difference.
The noise equivalent temperature difference is maintained at 30.5mk at 200k. In theory, this infrared photodiode can distinguish a temperature difference of 0.03 degrees Celsius at an operating temperature of minus 73 degrees.
As for 10 degrees and 20 degrees, that's easy. An object 20 degrees Celsius higher than the background is as bright as the sun in the eyes of the mercury cadmium telluride detector.
This temperature, or a higher temperature, is easily reached by the missile-borne refrigeration equipment. For the Institute of Guidance and Research, it can be said that it has solved the ultimate problem of all their infrared detection equipment - the sensor.
Gao Zhendong was also relieved. He knew that the performance of this detector was worse than that of the mercury cadmium telluride detector he had seen in his previous life. This was normal. What was the technical environment at that time? He already admired himself for being able to rub something like this out of something he had on his hands.
And although there is a slight difference, it is not too different, and the actual performance has been greatly improved.
The new generation of technology is so arrogant.
"Mr. Gao, the material you created is really exaggerated! I didn't even dare to imagine the level of improvement!" Lu Gong looked at Gao Zhendong and was extremely excited.
He could guess that since Gao Zhendong was so confident in this new material, there must be improvement, but such a large improvement really made him dare not think about it.
"How is the consistency?" Gao Zhendong did not open the champagne at halftime.
Lin Lianwei looked at the data analysis results: "Very good, the data deviation of different batches and different crystals is very small. If the same crystal is cut and made, the deviation will be even smaller."
(End of this chapter)