Chapter 843 Wait! I may have a way
The effect of this report was achieved. Tang Shaohui cleaned up and laughed: "Understand. Don't say, this method is made, the velvet is really beautiful, the black is shiny, and the printing of the phase tablet is made out. The blue surface is much deep. "
The black color means low reflectivity and good light trapping, provided that the black color is not obtained by other means.
A low-cost process is not necessarily worse than a high-cost process, as long as it is done in the right way.
Shining black? ! Um? ?
Gao Zhendong remembered something at once when he heard this adjective.
Black velvet board?
If you had said this earlier, I would not have been sleepy. I remember seeing this thing somewhere.
Gao Zhendong immediately started searching in consciousness, oh, it was it!
Before Tang Shaohui could walk out of the door of Gao Zhendong's office, he heard Gao Zhendong calling him.
"Wait, what's the problem with your craft? Let's hear it."
Um?
Tang Shaohui immediately turned around excitedly. Chief Engineer Gao pulled him. There must be a reason. Maybe he had thought of some solution!
As for Gao Zhendong, I do n’t even know how to think about the problem. It ’s another code. The affairs of the high -chief worker are different from ordinary people.
Tang Shaohui walked back excitedly, sat down, and took out some other materials that he was going to bring to the laboratory for work. These materials he had not originally planned to report.
"The problem now is that the response speed is too fast! As soon as the speed is fast, it is difficult to control. This is fast, exist in both the opening and expansion of the hole. At the same time, we have another problem. Bubbles, during the reaction process, there are bubbles. These bubbles will be attached to the silicon wafer, affecting the reaction, and the uniformity of the reaction.
After hearing this, Gao Zhendong stretched out his hand: "Show me your current craftsmanship."
Tang Shaohui quickly found the craft documents and gave it to Gao Zhendong.
Gao Zhendong looked at the craft documents. He didn't speak, sitting on the sofa, and said nothing, but he didn't call Tang Shaohui away.
In Tang Shaohui's opinion, Chief Engineer Gao must be thinking rapidly in his head at this time, trying to recruit people.
He guessed half of it. Gao Zhendong was thinking about recruitment, but he didn't think about it quickly. He was reading the document. It was a black velvet -made velvet craft file. The process steps were as high as 20 steps, which is a complete one.
After a long time, Gao Zhendong looked at Tang Shaohui.
"In the hole digging stage, you add about 25% hydrogen peroxide and about 1% soluble silicate to the hydrofluoric acid."
In the process files, these additive formulas are actually more than one, but some formulas are too complicated. It is difficult to obtain current conditions. Biological enzymes, fatty acidide, and acid alcoholic compounds are a bit super outlined for the current conditions.
The formula chosen by Gao Zhendong is much simpler. Neither hydrogen peroxide nor soluble silicates are strange things. If you grab a large amount, the effect is not bad.
Hydrogen peroxide? Soluble silicate?
Although Tang Shaohui discovered this phenomenon, he was not academic chemistry, but he could not study these phenomena. The research work was cooperated with chemical teachers and professors. It's far from understanding.
"Gao Gao, what's the use of these things? Tell me, I don't know this in myself. I write it down. When I tell the chemistry comrades, they can also master you early The idea of doing it is smoother.
At this time, Tang Shaohui admired Gao Zhendong. He listened and thought about it. He gave a plan.
Tang Shaohui has a hunch. The plan proposed by the Gao worker is more or less effective.
"Let's talk about silicate first. The reason for adding it is mainly to react with hydrofluoric acid to generate silicic acid, thereby inhibiting the speed of the corrosion reaction and solving the problem of too fast reaction speed that you mentioned."
Tang Shaohui said with a smile while remembering: "Ah, I understand, it's just to compete with the reaction for raw materials, I understand." Chief Engineer Gao said it simply and clearly, it is easy to understand, the truth is the most simple.
Gao Zhendong smiled and nodded: "Yes, that's the reason. As for hydrogen peroxide, it is to solve two problems. One is to promote the reaction and increase the depth of the hole. , Solve the problem you said. "
Tang Shaohui quickly wrote down, it sounded very reasonable, and I didn't know how Gao Gao thought it would think about it.
However, thinking of the organic chemistry book he had just seen on Chief Engineer Gao's desk, he seemed to understand that Chief Engineer Gao had been studying non-stop. As for the relationship between organic chemistry and inorganic chemistry, it didn't matter. , it’s all about chemistry anyway.
"As for the reaction speed of hole expansion, let's put it aside for now. Don't you have a silver removal process, and you also add hydrogen peroxide!"
Gao Zhendong made Tang Shaohui a little blinded. He added hydrogen peroxide to everything, right?
"At this step, the easy decomposition characteristics of hydrogen peroxide, the produced air bubbles play a rinse effect on the silicon wafer, which can cleaner the silver single and silver ions. At the same time And silver oxide can also help the removal of silver ions of deposits. "
In such a short period of time, Tang Shaohui and the comrades engaged in chemistry did not think so far-reaching, so Gao Zhendong simply made up for their shortcomings. Tang Shaohui was numb. Well, it sounded reasonable.
"The expansion phase you just mentioned is too fast, which is easy to cause excessive concave holes. Instead, the reflectance will increase. At this time, hydrogen peroxide can inhibit the reaction speed at this time. "
It’s hydrogen peroxide again! Tang Shaohui was completely numb.
Hydrogen peroxide is Wan Ying Lingdan, right?
Gao Zhendong added a sentence: "But you should pay attention to it, it is not a good thing for the reflectance to be too small. There will be a hot spot effect, but it will break the matter."
Having said this, he remembered another thing: "By the way, if the defoaming effect is still not good, you can use tens of thousands of Hz ultrasonic waves to impact the silicon wafer every once in a while, such as tens of seconds. Just press for a few seconds. You can adjust the specific time during the test, but remember that continuous impact will affect the hole digging and expansion reaction.”
This is easy to understand, shake the silicon wafer with ultrasonic waves, and shake the air in the air. Tang Shaohui is only in the impact and records it truthfully.
As for the rest, Gao Zhendong did not interfere too much. The process documents in his hand may not be the most suitable now. Just solve the core problems. For other things, it is better to let the comrades explore on their own under the current environment.
Tang Shaohui was stunned by Gao Zhendong's triple dose of hydrogen peroxide. He was still a little dazed until he returned to the laboratory.
A comrade majoring in chemistry from a university who came to support the research team excitedly joined him when he saw him coming back.
There is no mistake in every song, one post, one content, one 6 one, one book, one book, take a look!
"Tang Gong, how is the report? Does Gao Gao agrees with us to go to Shenyin?"
Tang Shaohui nodded: "Agree, and gave me a few ways to solve the current process problems. Come, Teacher Gou, let's show it."
Teacher Gou was pleasantly surprised by these words. It was just a report, and there was an unexpected surprise. To be honest, they never thought that Mr. Gao could solve problems in chemical processes. After all, it seemed that Mr. Gao was the same as Mr. Gao. The major of the job is too far away, so I don’t expect it.
Zhangu-2 Missile: Guess who did the mass production process of my unbiased dimethylhydrazine fuel?
"Really? Show me quickly." Teacher Gou did not underestimate Gao Zhendong just because he was not engaged in chemistry. It is not surprising that a third-level technician who is less than thirty years old can do anything technically.
Tang Shaohui, who was still being circled by Gao Zhendong's three consecutive hits, handed over what he had written down to Teacher Gou.
At first glance, Teacher Gou was as dumbfounded as Tang Shaohui.
"Hydrogen peroxide? Hydrogen peroxide again? Or hydrogen peroxide? Oh, the first step is a bit silicate."
But when he carefully read and analyzed other things Tang Shaohui had written down, the joy on his face became more and more intense, and in the end, the smile on the corner of his mouth could not be contained.
Don't look at the three consecutive three -round three consecutive consecutive chief workers, which look a bit outrageous, but after looking at it, it seems that this is really the case, at least it looks wrong.
The last ultrasonic shock to remove bubbles made him shine in front of him. Chemical and physical methods were grasped together. There is always a starting work.
"Oh, Mr. Tang, thank you so much. If you report this trip, you may save us a lot of trouble." Teacher Gou said cheerfully.
"Do you think you can really do it?"
"I think it is really feasible and feasible. Not to say that all of them are effective, at least some of them are effective, which is amazing." Teacher Gou said.
After saying that, he turned to greet his students: "Come on, come on, get some hydrogen peroxide. According to the process requirements, let's give it a try! Let's start the experiment."
Although there is no hydrogen peroxide in the laboratory, this thing is not uncommon, and it is often used as a disinfectant.
And fortunately, the reaction time of immersion silver hole expansion is not too long, each process only takes a few minutes at most
Two hours later, Teacher Gou and Tang Shaohui looked at a silicon wafer with a black paint in front of him, showing a surprise expression on his face, and it was unsuccessful, at least it didn't look worse.
A batch of more than one silicon wafer was sent to the test.
The two put the silicon wafer under the microscope, and Teacher Gou put his eyes close to it.
After a minute, he was full of joy and called to Tang Shaohui: "Tang Gong, come and see!"
Tang Shaohui brought his eyes up. Under the microscope, the small pits looked basically consistent with the requirements. The most important thing was that they were very even.
"Teacher teacher, the reflectance meets the requirements!" The voice of Teacher Gou's students also rang at this time.
(End of chapter)