Yield is always the biggest problem plaguing contact lithography!

A silicon wafer can produce thousands of chips, but in the end, 200 to 300 chips can be used, which affects production efficiency.

Whether it is the previous VCD or the current learning machine, Jiangxia Electronics Factory has suffered too much in this, the reason why Zheng Nan shared the design drawings of VCD with Nanyan and Dongfo manufacturers, in addition to attracting them to fight against Oriental Audio, more importantly, Jiangxia Electronics Factory's output is seriously insufficient.

The market of tens of millions of dollars in the country, with the pitiful output of more than 1,000 chips per month of the radio factory, it has to be filled in the year of the monkey, and the structure of VCD is not complicated in nature, like Nanyan and Dongfo, as long as they are given time, within half a year, a large number of knockoffs can be produced on the market, just like the VCD tragedy in the previous life.

Therefore, sharing is also a helpless way, and now sharing can still sell well, which is much better than them breaking the technology and imitating it to compete with themselves.

The same is true for the current learning machine, Zheng Nan deliberately pressed the shipments of Huang Pinchao and Zhao Wenhe, in addition to knocking them out, the more important thing is the output locked by the chip.

After all, according to the previous market situation of home computers, it is not too easy to sell thousands of units a day, not to mention that the market of learning machines is still too much, the problem is that Jiangxia Electronics Factory cannot afford to supply so many goods.

You must know that this is only a small market in Jiangxia, which can't be eaten, what will you use to occupy the national market in the future? Is it true that you have to go the old way of making rather than buying? Go to buy MS6502 chips with Ji Xin?

If you really do this, aren't you reborn in vain?

Knowing that the semiconductor industry in the future generations will be all together, Zheng Nancai must grit his teeth and desperately hold on to the last trace of the possibility of manufacturing a top-level lithography machine.

It is for this reason that Zheng Nan asked about the research and development progress of the projection lithography machine in three days.

Li Xing did not disappoint Zheng Nan, and quickly came up with a projection lithography machine, of course, Zheng Nan's hand-drawn sketch did play a big guiding role behind it.

But it's not enough to have a lithography machine, you also need to have the corresponding manufacturing technology.

However, this is difficult for these engineers and technicians of Nanyuan Electronics Factory, because they were just ordinary technicians polishing audio components a month ago, and it is difficult for them to learn the use of lithography machine technology this month, and now they have to explore the use of projection lithography machine by themselves across the era?

A lot of things are like that, and you don't wait until you're fully prepared, it's up to you to do it.

"Lao Zhang, I'm not talking about you, you people are guilty of dogmatism, always thinking about taking the steps of the contact lithography machine to set the projection lithography machine, although I understand that many of them can be used universally, but these two lithography machines are different!"

"The contact lithography machine is covered like a photocopier, but the projection lithography machine separates the photomask from the silicon wafer and projects it onto the silicon wafer through three sets of mirrors, so you don't have to worry about how much the photomask is pressed, and even the baking of the lithography machine becomes less critical......

In the office of the workshop, Li Xing constantly explained to Zhang Bensong the difference between the projection lithography machine and the previous contact lithography machine, and tried to help Zhang Bensong analyze the use skills of the projection lithography machine from the perspective of principle.

This made the engineers of the South Park Electronics Factory very dissatisfied, and they felt that you Li Xing was a bit excessive.

"Is making a lithography machine the same thing as using a lithography machine? If you Li Xing are really so powerful, why do you still ask us to learn any technology, you Jiangxia Electronics Factory will come by yourself! ”

"Originally, it was difficult for us to learn lithography in a month, but now we have just touched a little doorway, so we will change the projection lithography machine, not so bullying!"

"Do you really think Jiangxia Electronics Factory is amazing? What do you think of us as this? Without our chips, we can't just shut down, and we won't do anything to see what they can do with us......"

Hearing the employees of his own factory complaining like this, Fang Huanzhi suddenly burst into tears and shut up.

"I didn't hear what I said just now, but if I listen to anyone say stop and don't do it in the future, I will fire him immediately, and you won't do it for the rest of your life!"

Everyone was taken aback by Fang Huanzhi's sudden frenzy.

"Do you only see that Jiangxia Electronics Factory is calling us, and don't you see that we also need to master the use of projection lithography machines as soon as possible? Have you forgotten that we are still carrying more than 20 million usury, if we can't pay it off within the specified time, there will be no Nanyuan Electronics Factory in the future, and you will all have to be laid off! ”

"Forty pieces of a chip, if we rely on a contact lithography machine, we can only make more than 100 or 200 pieces every two and a half days, do you think with such an output, who will pay back 20 million when the time comes? Have you sold them all? ”

"I heard that the yield rate of the projection lithography machine is three to four times that of the contact type, which is equivalent to the same silicon wafer, the same lithography and etching time, we can create seven or eight hundred chips!"

"So you still think it's useless?"

Fang Huanzhi looked around, even the loudest person just now, now lowered his head.

"I know you all have emotions, after all, you have worked hard for too long, but in order for Nanyuan Electronics Factory to really regain its life, we must continue to grit our teeth and persevere, whether it is a projection lithography machine, or a progressive or step-by-step lithography machine that may appear in the future, no matter how hard the bones are, even stones, we must gnaw down, because we have no way out!"

Fang Huanzhi paused: "Of course, I can also see your hard work, I see that you work until two or three o'clock in the middle of the night every day, and there are many people who don't fit your eyes all night, so I can understand your emotions, if any of you can't persevere, you can ask me at any time, I will allow you to leave the team at any time, and I will pay you an extra month's salary." ”

All the engineers and technicians immediately said that they did not want to leave, and they had to fight to the end with the South Park Electronics Factory, begging the factory director not to fire them.

Fang Huanzhi looked around, his face full of relief: "It is worthy of the soldiers I carefully selected, everyone is good!" We hope that everyone will remember their vows and that we will overcome this together! ”

Overcome the difficulties together!

Fang Huanzhi breathed a sigh of relief, he turned around and left, just in time to see Zheng Nan watching at the door.

Fang Huanzhi was stunned, then walked up quickly, Zheng Nan took him to another office, and praised him for doing a good job.

Fang Huanzhi shook his head in fear: "This is all a good point mentioned by Director Zheng, if it weren't for Director Zheng reminding me to pay attention to everyone's emotions, they suddenly broke out today, I'm afraid I would really be caught off guard." ”

Yes, all of this today is the result of Zheng Nan reminding Fang Huanzhi in advance.

Because regardless of contact lithography or projection lithography, this is a landmark technology that countless engineers have explored for several years, and the hardships of Nanyuan Electronics Factory can be imagined if they continue to learn and iterate within a month, so Zheng Nan has also been concerned about the emotional problems of these employees of Nanyuan Electronics Factory.

Zheng Nan waved his hand: "I'm just reminding you to pay attention to the problem, but how to solve it still requires Director Fang to figure out a way by yourself." ”

But Zheng Nan also pointed out at the same time that Fang Huanzhi's words today are indeed very inspiring: "But fighting chicken blood is not a panacea, although I say this a little bit standing and talking without backache, but I still hope that Director Fang can find a way to alleviate everyone's hard work." ”

Fang Huanzhi nodded and said that what Zheng Nan mentioned was very useful, and it was usually difficult for him to perceive.

"Originally, I thought that Director Zheng was just a coincidence, but now I understand that Director Zheng is really capable!" Fang Huanzhi said from the bottom of his heart.

Zheng Nan smiled: "Okay, don't say anything about this kind of sycophancy, you can get the use of the projection lithography machine for me as soon as possible is the best news for me!" ”

Fang Huanzhi nodded seriously to ensure that the task was completed, and he told Zheng Nan As Li Xing said, no matter whether it is a contact or projection lithography machine, as long as the chip is made, the principle of many steps in the middle is the same, such as the beginning of making a photomask, the later photoresist baking and etching, etc., etc., what needs to be overcome now is only the difficulty of photolithography.

"I asked Zhang. He can strive to solve the problem of mass production within a week, but it is difficult to guarantee the yield rate. Fang Huanzhi said.

Zheng Nan waved his hand: "It's okay, as long as you get on the machine first, find a problem in the middle and solve it." ”

Fang Huanzhi said that this is also his own idea, after all, no matter how good the theory is, many problems can only be discovered when it comes to the stage of real action.

Fang Huanzhi hesitated for a moment and asked, "But Director Zheng, if we can achieve mass production, the number of projection lithography machines can ...... I know it might be a bit greedy to say that now, but after all, we are still 20 million in debt. ”

Zheng Nan reassured Fang Huanzhi: "As long as you can achieve mass production, there will definitely be lithography machines!" ”

Zheng Nan is not fooling Fang Huanzhi, since Li Xing used the lenses of the contact lithography machine to make a projection lithography machine, there is still a contact lithography machine left, which can be disassembled and reassembled into a projection lithography machine.

In addition, the superfinishing grinding machine at the Ninghai Optical Instrument Factory will arrive next month, and now these high-precision lenses will be mass-produced, and their production of projection lithography machines will be accelerated.

"At that time, what the factory director should worry about is not the problem of insufficient machines, but that the clean room is too small, and the construction of a separate plant should be put on the agenda!" Zheng Nan said.

Fang Huanzhi shook his hand again and again and said that the matter was still too far away, and with the current ability of Nanyuan Electronics Factory, survival was the first priority.

It's just that after all, Fang Huanzhi actually imagined that one day in the future, Nanyuan Electronics Factory would really be able to build a factory dedicated to chip manufacturing.

How nice would that be......