The rise of nanometers

Huang Xiuyuan started to think.

The unit storage capacity of Lilong 1 is 92G per square centimeter; Lilong 2 is 184G per square centimeter; Lilong 3, which is ready for mass production, is still 184G per square centimeter, but has a rewritable function.

If the storage capacity is reduced to 8G per square centimeter, it will require a lot of area to be applied to mobile phones to achieve ultra-large capacity storage.

The size of the Chengying mobile phone is 14 cm long, 6.8 cm wide, and the area is 95.2 square centimeters; while the size of the Tai'a mobile phone is 15 cm long, 7 cm wide, and the area is 105 square centimeters.

If the entire area is made into a glass optical disc storage, 95.2 square centimeters can store 761.6G, and 105 square centimeters can store 840G.

It's just that the entire area is made into a glass disc, which is obviously unrealistic.

Wait?

Huang Xiuyuan was about to say something, but suddenly stopped because he remembered a piece of information in his future memory.

In 2035, human semiconductor storage technology, magnetic disk storage technology, and glass optical disk technology have all entered a bottleneck period of development.

At this moment, a genius imagined a nanodot storage technology that could achieve large-capacity storage, long-term preservation, and low-cost production.

Logically speaking, Huang Xiuyuan should be very familiar with this technology, but the fact is exactly the opposite, because this technology was born at the wrong time, and it encountered another revolutionary data storage.

Only two months after that genius published his paper and conceptual product, another revolutionary product appeared on the market, instantly increasing the unit data storage capacity by thousands of times.

Therefore, nanodot storage technology was aborted before it could be launched on the market.

Huang Xiuyuan also met that genius at an internal symposium in 2052, and talked about it while chatting.

Afterwards, he specifically checked those papers. If it weren't for the emergence of another revolutionary product, nanodot storage technology is indeed very powerful and can extend the life of glass optical discs for a period of time.

Huang Xiuyuan calculated it and found that this technology can be achieved at this stage, but the storage capacity is not as powerful as it will be in the future.

"I have an idea. Let's go to the design center and discuss it."

Hearing these words, Lu Xuedong, Zhang Weixin, and Miao Guozhong were stunned for a moment. Then Lu Xuedong asked with a smile: "Xiuyuan, what do you think?"

"You will know when we get to the design center."

"Then let's go!"

A group of people came to the design center of the semiconductor base.

Huang Xiuyuan found an industrial design computer and started operating it. Soon a three-dimensional graphic appeared on the industrial software platform.

"Multi-layer three-dimensional structure?" Lu Xuedong was a little confused.

Miao Guozhong reminded: "Chairman, if this structure is adopted, there will be no way to burn and read."

The confident Huang Xiuyuan turned his chair, faced everyone and said with a smile: "You all know that the data points of glass discs are burned, read and erased through ultraviolet and infrared rays."

Lu Xuedong scratched his head and asked in confusion: "Um? Does this have anything to do with the three-dimensional structure? The only relationship I can think of is that this situation will restrict the development of glass optical discs into three-dimensional structures."

"A little reminder of our nanoscreen technology."

Nano screen technology?

led?

Nanoscale light-emitting diodes! Lu Xuedong reacted immediately: "Do you plan to apply nano-screen light-emitting diodes to the storage technology of glass optical discs?"

"Yes, this is what I think..." Huang Xiuyuan said, turning his chair and pointing to the three-dimensional structure on the industrial software platform to explain.

This design divides the glass memory into three layers, with a special data point glass layer in the middle; the upper layer is a deep ultraviolet diode, which is used to burn and erase data points in the glass layer; the lower layer is an infrared diode and light wave sensing The detector is used to excite infrared rays so that the data points in the glass layer reflect different light waves to achieve the purpose of data reading.

Since the data point glass layer, deep ultraviolet light diode layer, infrared light diode and light wave sensor are all nanometer-thick, plus the outer light-shielding layer, the overall thickness will not exceed 300 nanometers.

In other words, this kind of composite glass optical disc can increase the storage capacity through continuous lamination.

Calculated based on a layer of 300 nanometers, a thickness of 1 mm can be stacked up to 3333 layers. Even if only 8G can be stored per square centimeter, with the blessing of 3333 layers, the storage capacity will be increased to more than 20 tons. This is the three-dimensional structure. The advantage lies in.

Miao Guozhong thought for a while and knew the key to this technology: "If this is the case, then we need diodes that can emit ultraviolet and infrared light."

"There is no problem." Lu Xuedong is the head of the scientific research department. When developing nanoscreen technology, the scientific research department tried many materials and selected three light-emitting diodes of three primary colors. In the process, other wavelength bands were developed. of light-emitting diode materials were discovered.

Therefore, there is ready-made technology for deep ultraviolet and infrared light-emitting diodes.

Zhang Weixin expressed a concern: "Chairman, if this composite method is adopted, will the cost be too high?"

After all, the production cost of high-precision nano-screens can be very high.

"Infrared light diodes do not require high precision, and the cost is only a few yuan per square centimeter." Lu Xuedong continued: "The key point now is the cost of deep ultraviolet light diodes."

The reason why infrared light diodes do not need too high precision is because the reader only needs to emit infrared light to illuminate the glass layer. Similarly, light wave sensors do not need too high precision.

Ultraviolet light recording requires high precision. Each ultraviolet light diode corresponds to a data point, and the cost is not low.

Huang Xiuyuan smiled and said: "This problem is actually not unsolvable. You have forgotten another characteristic of the data points."

Another feature? Lu Xuedong was stunned: "A data point or what feature?"

"Under infrared excitation, since the data points are in an electronically active state, ultraviolet light will be inhibited from modifying the state of the data points."

"This characteristic?"

"It's interesting. If you change the illumination lumen of each infrared light diode and match the lumen of ultraviolet light, you can use low-precision ultraviolet light diodes to control data points within a certain range." Lu Xuedong said while turning on a Computer, on which preliminary simulation calculations are performed.

Through simulation calculations, they obtained an optimal solution.

The single-layer composite storage layer with 24G per square centimeter is the most cost-effective. The light sensor is 3.7 yuan, the infrared diode layer is 5.4 yuan, the deep ultraviolet diode layer is 8.3 yuan, the data point glass layer is 2.2 yuan, and the light shielding layer is 0.1 yuan, a total of 19.7 yuan. .

With 10 layers, the storage capacity is 240G and the production cost is 197 yuan.

The cost is already very low, and it can be used as a computer hard drive or a mobile phone memory card. In fact, the main market for this design is laptops, tablets and mobile phones.

As for desktop computers, you can use this three-dimensional glass disc or an old-fashioned glass disc. After all, the size restrictions of desktop computers are not too strict.

After preliminary finalizing the design plan, Huang Xiuyuan ordered Zhang Weixin and Miao Guozhong to try to manufacture and perfect the three-dimensional structure of glass optical disc production technology as soon as possible, and prepare to launch it on the market.