An hour later, Tomoki Kashima and Cao Fei returned to the office building after their visit. After listening to Yu Zixian's brief introduction on the possible out-of-stock situation of photoresist, the group frowned.

Tomoki Kashima also gave you a brief introduction to the situation about photoresist.

Photoresist is a light-sensitive mixture composed of three main components: photosensitive resin, sensitizer and solvent.

Using photochemical reactions, the required fine patterns are transferred from the mask to the pattern transfer medium on the substrate to be processed through exposure, development, etching and other processes, where exposure is through the irradiation or radiation of ultraviolet light, electron beam, excimer laser beam, X-ray, ion beam and other exposure sources, so that the solubility of the photoresist changes.

According to the classification of application fields, photoresists mainly include printed circuit boards (PCB), photoresists, special chemicals (photoinitiators and resins), liquid crystal display (LCD) photoresists, semiconductor photoresists, photoinitiators and photoresists for other purposes.

Photoresist has been the core material of semiconductors since its invention in 1959, and has been improved to the manufacture of PCB boards, and in recent years, it has begun to be used in the processing and manufacturing of flat panel displays. End applications include consumer electronics, home appliances, automotive communications, and more.

The lithography process accounts for about 35% of the entire chip manufacturing cost, and the time consumption accounts for 40%~60% of the entire chip process, which is the core process in semiconductor manufacturing.

Taking semiconductor photoresist as an example, in the photolithography process, the photoresist is evenly coated on the substrate, and the pattern on the mask is transferred to the substrate through the processes of exposure (changing the solubility of the photoresist), development (using the developer to dissolve the soluble part of the modified photoresist) and etching, forming a geometric figure that exactly corresponds to the mask.

Lithography continues to evolve as chip integration increases. In order to meet the higher requirements for density and integration levels of integrated circuits, photoresists for semiconductors increase the ultimate resolution by continuously shortening the exposure wavelength.

At this time, the world's chip technology level has stepped into the micro-nano level, and the wavelength of photoresist has gradually changed from ultraviolet broad spectrum to G line (436nm) and I line (365nm). At present, the photoresists mainly used in the semiconductor market include two types of photoresists: G line and I line, and the core technology of photoresist is basically monopolized by Yuben and American companies.

Photoresist not only has the characteristics of high purity requirements and complex process, but also needs the corresponding lithography machine to pair and debug with it. Under normal circumstances, a chip needs to undergo 10~50 lithography processes in the manufacturing process, due to different substrates, different resolution requirements, different etching methods, etc., different lithography processes have different specific requirements for photoresist, even if the lithography process is similar, different manufacturers will have different requirements.

There are many varieties of photoresists for different applications, and these differences are mainly achieved by adjusting the formulation of photoresists. Therefore, adjusting the formulation of photoresist to meet differentiated application needs is the core technology of photoresist manufacturers.

Listening to Tomoki Kashima's introduction, Yu Zixian also thought of the development of domestic semiconductor materials at this time.

Domestic semiconductor photoresist started very late, even if there are some manufacturers and institutes of photoresist, the technical level is very backward, can only be used in small batches of some research institutes.

Even after 20 years, the production capacity of semiconductor materials is mainly concentrated in low-end products such as PCB photoresist and TN/STN-LCD photoresist, and the production capacity of high-tech barrier products such as TFT-LCD and semiconductor photoresist is very small, and a large number of imports are still required, resulting in a much greater domestic demand for photoresist than local production.

Not to mention this time in 1991.

"Just now, I have asked Tong Ruoyu to contact Jin Zhijiang and Hao Meng to find out as soon as possible what is the reason for this out-of-stock!"

However, at this time, Yu Zixian still couldn't figure it out, at present, Xiangji was only in the debugging stage, and it was cut off by the supply of chip manufacturing materials, which is really a bit confusing!

At this time, all the equipment of Xiangji has been installed in place, and even the commissioning of the equipment has entered the end, and the final joint test of the production line and the final trial operation can be started immediately.

Because the participation of the manufacturer's technical personnel is relatively high, the progress of the commissioning work is relatively fast! There is no need to wait until October 1.

Previously, Magic Core Technology sent to Arizona, USA to contact WDC personnel, has successfully applied for W65C02 and W65C816 microcontroller production authorization, WDC is happy to authorize Magic Core Technology Company to produce.

The licensing fee is because it is a continuous licensing model, that is, for more than ten years until the expiration of the 6502 chip patent, Moxin Technology has to pay the licensing fee to WDC every year. However, as a result, the annual licensing fee has also dropped significantly, much lower than Yu Zixian expected, at $800,000 a year. However, the only requirement of WDC is that it is not allowed to authorize third parties, and it can only be used for electronic products owned by Magic Core Technology or holding companies.

As for the authorization of Yu Zixian's 6502 chip 8-bit and 16-bit chips to continue to improve the design, because of the relationship between the funds of Magic Core Technology, no formal agreement was signed for the time being, but a simple agreement of intent was signed. According to preliminary information disclosed by WDC, the license fee will not be too low, starting at $3 million per year.

With the licensing agreement, WDC directly provided a full set of design layout drawings for the W65C02 and W65C816 chips.

Because W65C02 and W65C816 chips are mature chip designs, there is no need to carry out layout verification, tape-out and other links of chip design. The GDSII format can be sent directly to the board factory to make a mask, and after the mask is made, it can be produced on the assembly line, and finally the die covered with bare dies can be obtained.

Wafer test tests the die before it is diced and packaged to test whether the die is qualified. After these dies pass the CP test (also known as the chip function test), the damaged die is marked for subsequent yield analysis and improvement.

As long as the yield of the final production chip reaches the predetermined target, the transformation of the production line this time will be considered a success.

This and the subsequent yield rate need to be improved urgently, which needs to be completed in continuous equipment fine-tuning and continuous improvement of the process.

According to the original plan, the first step is to realize the chip production substitution of the current Little Doctor learning machine and the Overlord game machine!

At present, the sales of Xiaobo learning machine and Dabawang game machine are hot, and the number of 8-bit W65C02 processor chips required by Huari Electronics every month is about 200,000.

After the completion of the transformation of the production line of Xiangji, due to the low initial yield of the production line, the monthly chip output in the first two months fluctuated at about 240,000 pieces (8,000 wafers * 100 pieces * 30% yield), and the subsequent core output will increase with the increase of yield.

According to the plan, the yield rate of the production line of Xiangji should be increased to more than 60% within three months, to more than 80% within half a year, and to full production and more than 90% within one year.

When the yield rate is increased to 80%, every improvement in the yield rate requires a lot of investment, so after 90%, for the sake of capital cost performance, it is generally not deliberately increased at a large cost.

And the current situation, the output of the 8-bit version of the W65C02 processor in half a year is enough for Huari Electronics to use for more than 1 year. In the second half of the year, the SFC version of the Overlord version, which is being secretly developed at the moment, will come, and then the 16-bit version of the W65C816 processor chip will be needed. At that time, the 1.2 micron production line of Xiangji will really come in handy.

After all, using a 1.2-micron process production line to produce a 3-micron chip is indeed a bit of a performance waste.

After the completion of the production line transformation, the early 8-bit version of W65C02 production, the production of chip types in the middle will not change, on the one hand, in order to collect chip production data, facilitate data comparison and analysis, and further improve the yield. Only after the yield rate is improved to a certain extent, the equipment is adjusted to a basically perfect state, and the matching 1.2 micron process will be further trial-produced.

A plan is a plan, and it is always changed by sudden surprises......

Just like now, if the production line is really stopped because of photoresist, then Yu Zixian should really cry without tears...... Although Yu Zixian was speechless at this time about the notice issued by Marubeni that the supply of photoresist might be interrupted, what he should do and respond positively is still very much needed!

After all, Xiangji at this time is not the Sifang Electron Tube Factory a year ago, and it is a smear of what happened abroad or directly to this semiconductor.

At this time, Xiangjidian has a large number of senior managers and technicians from Yueben, and they still have a large number of contacts.

Not to mention Tomoki Kashima and the technical team he invited to help with the construction.

Of course, there is also ASML, which is temporarily a teammate at this time, and they are also anxious that the photoresist will be interrupted. The small quantities of photoresist that are currently being commissioned are provided by ASML. This time it was the large amount of photoresist that was needed for subsequent production.

Of course, this time, Yu Zixian valued the most important thing to say that Shunichi Aso, the mentor invited by Cai Junjie. If she can say a few words when necessary, it should still be very useful.

Shunichi Aso is the deputy director of the semiconductor laboratory at Tokyo Metropolitan University, and he can be regarded as a very influential senior. This time, it was not easy to be moved by Cai Junjie to guide the work.

Of course, the money that should be spent is still to be for, for example, at their level, to help the manufacturer solve a small problem, are more than 50,000 US dollars; if it is a big problem, need to provide a complete set of solutions, then sorry, you have to sign a project contract, the contract price is not 100,000, 200,000, embarrassed to shoot?

This time, although because of Cai Junjie's relationship, the tutor did not directly raise the issue of the venue fee, but Yu Zixian knew that this money could not be saved, not only could not be saved, but it was also given more, and he didn't see that Aso Shunichi was followed by two Cai Junjie brothers and sisters, one man and one woman......

This is the object of Yu Zixian's covetousness...... Of course, it's just a gluttony for talent and skills! Yu Zixian doesn't dare to wrap a rope!

Especially at the stall where Yu Zixian instigated Cai Junjie to persuade Aso Shunichi to set up a form similar to the "enterprise postdoctoral research workstation" at this time in China, and jointly established the secondary joint laboratory of Xiangji with Aso Shunichi himself......

The planned secondary joint laboratory is jointly managed by Cai Junjie and Shunichi Aso, who are in charge of the Xiangji laboratory, and the annual planned cost is not less than 500,000 US dollars. As for the test technology and corresponding patents obtained by the joint laboratory, the rights and interests will be distributed according to the 7:3 case of Xiangji Laboratory and Shunichi Aso.

If the first year produces relatively good experimental results or technical value, Xiangji will adjust the next year's funding on the basis of the previous year, and the range will not be less than 50%.

For an almost free amount of experimental funds, Aso Shunichi is very happy to accept. There is also an additional place for doctoral students to experiment and practice......

For such cooperation, Cai Junjie is also very happy to see. After all, the current level of science and technology in the field of semiconductors is very high. Just like a while ago, some experiments Cai Junjie had to use his mentor's laboratory to complete them......

However, Yu Zixian is willing to accept and even actively promote the establishment of this laboratory for Cai Junjie, and Yu Zixian has a little other discovery......

In his words and deeds, Cai Junjie is always peeking at the female doctor named Shizuka Fukuda who is following Aso Shunichi, that is, Cai Junjie's younger sister...... And Shizuka Fukuda doesn't seem to be married, but I don't know if she has a boyfriend......

Okay, Yu Zixian is just a talent to pester, but he didn't expect Cai Junjie to be a pestering person...... Talent or body?!

For this, Yu Zixian likes to hear it...... As long as he can entangle, Yu Zixian can save a lot of heart.

Secretly, Yu Zixian hinted to Cai Junjie: "This year, in order to reward you for your 110 three-bedroom, two-living room, one-kitchen and one-bathroom house located in the urban area, the company office got the key two days ago, and is about to notify you of the key, if you can get your junior sister this year...... Or if you get married, I'll give you another surprise now, and the company will pay you to renovate for free...... All you have to do is check in with your bags......"

Cai Junjie didn't expect that this little secret of his own was actually discovered by Yu Zixian...... A little shy for a while.

"Hey, I said that there is a big man, what is there to be shy? When Uncle Cai left, he specially told me to take good care of you for you! You are 30 people, shouldn't you work harder!

Hearing Yu Zixian say this, Cai Junjie finally nodded and said, "Well, I know." ”

"That's good, by the way, it's still a few days before they get back to Yuben, so you need to hurry...... For example, go to those shopping streets in Xiangjiang and buy some shiny things that girls like...... Don't be afraid to spend money, this time I will call the shots, reimburse you, and go to the finance department in the afternoon to receive 50,000 yuan of activity funds......!

Cai Junjie heard Yu Zixian think about himself like this, and once again lowered his head shyly......

"Damn, how can you do this? You must show the domineering spirit when you do your work! For girls, you must be bold and careful, you must take action when you should shoot, and after work, you can go shopping, eat, and even do sports when necessary...... Wrap her around."

"Holy!"

Cai Junjie once again successfully lowered his head......

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