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Because there is no reference object, the pattern of ITO has to be designed by Xu Qiu himself.

This kind of pattern that requires precise drawing needs to use CAD software in theory, but Xu Qiu doesn't know CAD, so he uses PPT instead. Anyway, he is the client now.

In fact, PPT is very powerful, and there are many templates in it. Most of the post-effects of pictures in Xu Qiu's articles are processed by PPT.

The first thing is to determine the size of the substrate. This is not suitable for easy changes. Xu Qiu decided to use a square substrate of one square inch, which is about 2.54 cm. He directly pulled out a square with a side length of 2.54 cm in the PPT.

Then there are the central patterns, circles and squares are relatively simple patterns that come to mind.

Xu Qiu thought about it for a while and decided to use a circular shape. Although the substrate is square, and the 0.04 and 0.09 square centimeter patterns obtained by the overlapping method are also square, but during the spin coating process, the solution is similar to that from the center of the substrate to the periphery. Film formation, the thickness and properties of the effective layer on the circular boundary are relatively close.

Of course, this reason is a little weak. In fact, the main reason is that Xu Qiu simply thinks the round shape looks better...

In many cases, scientific researchers can decide some things willfully, just like Chen Wanqing named her materials C4, CH3, and CH4 before.

Next, is to determine the size of the effective area.

Xu Qiu slapped his forehead, and first calculated according to one square centimeter. At this time, the inconvenience of the circle is reflected. If it is a square, even elementary school students can calculate that the side length is one centimeter.

After pressing the calculator a few times, Xu Qiu found that the radius is about 0.56 cm, so the diameter is 1.12 cm, and the side length of the substrate is about 2.54 cm. Obviously, the circle in the middle is a bit small.

Therefore, he continued to increase the area to two square centimeters, and at this time the radius became 0.80 centimeters, which was more appropriate.

Xu Qiu first drew a circle with a radius of 0.80 cm, and moved it to the center of the square, then added a rectangle with a width of 0.30 cm and a length of 2.54 cm at the bottom of the square as the connection point of the ITO electrode, and finally, used a Thin wires with a width of 0.10 cm connect the central circular and lateral rectangular electrodes.

It is the shape of a circle and an inverted T, a bit like a globe.

Mark the length of each pattern on the side, and the ITO substrate pattern design is completed.

Finally, Xu Qiu started to design the mask, which was relatively easy. He directly made a rectangle with a length of 2.54 cm and a width of 2.10 cm, and then copied 25 of them according to the pattern of the previous mask to form a 5*5 array.

Xu Qiu simulated the manufacturing process of the device in his mind. Through the mask, metal electrodes can be evaporated on the device. The metal electrodes will cover the position of 2.54 cm * 2.10 cm above the ITO substrate, leaving a space of 0.44 cm. The overlapping part of the electrode and the lower ITO is a circle with a central radius of 0.80 cm and a thin line about 0.03 cm long. The area of ​​the thin line is about 0.003 square centimeters, which is almost negligible, and the final effective area is 2 square centimeters. .

After obtaining large-sized devices, use baffles of different areas to obtain test data of battery devices with different sizes. Because when testing with baffles, the non-tested areas will not be illuminated, so lateral exposure can be avoided. Current problems make the test results more accurate.

The new ITO pattern didn't seem to be a problem, so Xu Qiu talked with Duan Yun about the masks and shutters. He knew that Duan Yun's brother could process them.

After receiving the quotation, Xu Qiu went to 218 to discuss with Wei Xingsi with the sample PPT.

At this time, Wei Xingsi was making tea and drinking. Seeing Xu Qiu, the two first chatted a few words about walking the red carpet in the afternoon, and then got down to business.

Speaking of which, the coffee culture is very prevalent in the beautiful country, but Xu Qiu has never seen Wei Xingsi who has returned from the beautiful country drink coffee, and always drinks tea, and I don't know why.

Wei Xingsi looked at the PPT, nodded and praised: This idea is still very ingenious, and it is also very beautiful.

After a pause, he continued: Theoretically, I don't think there is any problem. How about the specifics, we still have to actually make a standard sample device to know. By the way, is the conductive glass manufacturer you picked reliable?

It's reliable, Gong Yuanjiang and his team bought this store. Xu Qiu replied.

Oh, that's fine. Wei Xingsi didn't ask too much, and then said, You can ask Duan Yun's brother to help you make the mask and shutter.

I have already asked, Xu Qiu said, They quoted a price of 3,000, a complete set including two masks, and baffles of various sizes. I negotiated with them, and the price reached 2,500. Xu Qiu remembered At that time, the first bite directly cut to 300, and Duan Yun was so shocked that he slapped the table...

Wei Xingsi thought for a moment, and said, Let him do it, get it done as soon as possible, and remember to issue an invoice.

The next morning, both Han Jiaying and Wu Shengnan went to Zhang Jiang to do the synthesis.

The school girl’s experiment was stopped for two days on Monday and Tuesday, and it is about to start. Although the organic synthesis experiment lasts for a long time, often ten days a week, it does not take much time on average every day. It is more suitable for review and tiredness. An experiment to adjust the mood.

Xu Qiu came to Caiyi 216, dialed the phone number on the ITO substrate package of Gong Yuanjiang's research group, and was quickly connected.

Hi, hello, Shuohua conductive glass.

This is Wei Xingsi's research group at Modu Comprehensive University. I want to order a batch of ITO substrates.

Okay, if it's convenient, please add sales QQ chat, the number is 90...

90...?

Yes.

After hanging up the phone, Xu Qiu added the other party's QQ, named Shuohua ITO.

There are many types of conductive glass. According to the composition of the conductive film on the glass, it is divided into ITO, FTO, AZO, etc., among which ITO is the most widely used one.

Xu Qiu sent over the picture of the ITO substrate that was made yesterday, and then asked, Can I make this type of ITO substrate, and what's the price?

One minute later, I received a reply: The starting price is 500 pieces, the price is 4 yuan per piece, 1000 pieces +, 3.5 yuan per piece, 2000 pieces +, 3 yuan per piece, this pattern is more complicated, there is a thin line, single piece The price will go up by 1 yuan.

Xu Qiu did some calculations, and it turns out that the domestic ones are much cheaper. The imported ones used to cost about 4 US dollars, which is more than 20 yuan. Now even if the price goes up by 1 yuan, the most expensive one is only 5 yuan. The price difference four or five times.

If you use new ITO, you don’t even need to reuse it. The old ITO substrate is still troublesome to wash, and there will be scratches on it after repeated use, which will also affect the performance of the device.

The performance of the device is the result of multiple synthesis. The material of the effective layer determines the base number. Various situations encountered in the preparation of the device will reduce this value. For example, if there is a scratch, the efficiency -3%; A speck of dust, efficiency -4%; no transmission layer evaporated, efficiency -20%...

After thinking for a moment, Xu Qiu replied: First order 500 pieces, the address is 201, the first floor of the materials, Handan Campus, Magic City, Magic City, the addressee..., need to invoice, pay the information, Magic City University, taxpayer identification The number is 1210....

Darling, we need to sign an electronic contract first, because it is the first time we cooperate, and you and the supervisor of the research group need to sign it together. If there is no problem, I will generate a contract template for you. The salesman replied.

Yes. Xu Qiu judged in his heart. He cooperated with Shencheng Optoelectronics Company to buy single units before, and the other party only had a quotation and did not sign a contract. It seems that their profits should be very high, and they are not afraid of occasional running orders. , and this kind of conductive glass, the price is transparent, the competition should be relatively large, mainly relying on small profits but quick turnover.

Three minutes later, the other party sent over a PDF contract document.

After Xu Qiu saw it, he felt that there was nothing wrong with it, so he signed the contract with Mr. Wei, and sent it back. The matter of the ITO substrate was temporarily closed.

There is still a big difference between the scientific research process and the life of university classes. It does not just end up doing experiments with your head covered. Instead, you may encounter various things all the time, waiting to be dealt with.

PS: Continue to pay 7500+ today, currently owe 3W1, and have repaid 1W8, and strive for more tomorrow.