The rise of nanometers

After the first draft of the composite three-dimensional glass disc was finalized, the official number of the product was named "Glass Dragon-4".

Zhang Weixin immediately discussed with the industrial designers to set the appropriate storage capacity.

Although in theory, the design of Lilong-4 can increase the overall storage capacity of the memory through continuous stacking, each stacking layer also means that the cost doubles.

Therefore, while considering the storage capacity, you also need to consider the cost and make it as cost-effective as possible.

According to the current situation of mobile phone memory (ROM) on the market, Samsung and Apple both have 64G versions, while domestic mobile phones such as Dragon Totem, Huawei, and ZTE are also in the stage of 64G memory + 1/2G storage.

Therefore, the lowest version of Lilong-4 should be 3 layers, which is 72G.

After Zhang Weixin discussed with Long Totem’s product designers, he also communicated with the market research department, and finally determined three versions of Lilong-4: low, medium and high, namely 3 layers with 72G, 6 layers with 144G, and 10 layers. 240G.

the other side.

Huang Xiuyuan, Lu Xuedong, Miao Guozhong and others did not stop. The composite three-dimensional glass optical disc technology applied to Lilong-4 is not only used in storage.

The hard drive and memory on our computers, and the memory and storage on our mobile phones. According to industry classification, computer hard drives and mobile phone memory are ROM (read-only memory); while computer memory and mobile phone storage are RAM (random access storage). device).

Perhaps many people will be confused when they see the Chinese translation of ROM - read-only memory. As the name suggests, read-only memory is a memory that can only be read and cannot be deleted or burned.

This understanding cannot be said to be wrong, because early ROM storage can indeed only be read and cannot be burned or deleted at will, just like the first generation of glass discs.

However, with the development of the times, ROM storage has the functions of reading, erasing and burning, namely EPROM and EEPROM.

However, the industry has not changed the naming and has continued to use the name ROM.

This is why today's mobile phone memories can be deleted and data entered, because they are EPROM and EEPROM memories, not ROMs from the ancient times.

More than two weeks later.

In the laboratory.

Everyone has made a small batch of single-layer composite glass optical discs, and is currently testing the read speed.

Looking at the speed on the professional testing instrument, Miao Guozhong said excitedly: "It's amazing. The random read speed has reached 9GB per second, which is twice as high as our RAM read speed."

Currently, Dragon Totem's ARM memory reading speed can reach up to 4.5G per second, which is slower than Samsung's running memory reading speed. This is due to lack of design experience.

The reading speed of composite glass discs reaches an astonishing 9GB per second, which can basically beat RAM.

In fact, on computers in the 1990s, virtual memory was popular for a period of time. You can use professional software to use the solid-state drive (ROM) as memory (RAM), but the running speed will be very slow. This is A workaround caused by the high price of early memory sticks.

Nowadays, few people use virtual memory.

However, with the development of technology, the boundaries between RAM and ROM are becoming increasingly blurred.

Just like the composite glass optical disc that Huang Xiuyuan is currently researching, its reading speed, burning speed, and erasing speed are all faster than traditional running memory RAM. It does not have the shortcomings of traditional running memory and will not clear data when power is turned off.

The reason why the reading speed of composite glass optical discs is so powerful is because of its design advantages. After all, the light wave reader itself is combined with the entire data point glass layer. This design structure is conducive to rapid reading. purpose of taking.

Huang Xiuyuan also tested the energy consumption when reading data. It is indeed higher than ordinary storage memory, but lower than ordinary running memory, and the energy consumption is somewhere in between.

In fact, since the nanoscreen itself is self-luminous rather than a backlit LCD LED screen, the energy consumption will be slightly lower.

Coupled with BYD's battery technology, overall the battery life of Tai'a mobile phones and Chengying mobile phones is relatively strong. The current average battery life of Tai'a mobile phones is about 1.7 times that of Apple's.

If it weren't for the ultra-thin design of Dragon Totem, the battery could actually be designed larger to make the battery life longer.

For example, ZTE has a 9,000 mAh super battery life machine.

After testing the composite glass disc, Lu Xuedong talked about an idea he had before:

"Xiuyuan, even if our high-end mobile phones use Thunderbolt 2 batteries, they must maintain a thickness of 0.4 centimeters and can only reach a maximum of 7500 mAh."

Leiguang 2 is a new battery developed by Long Totem and BYD. It is currently in the laboratory stage and is an upgraded version of the Leiguang 1 battery currently in use.

The increase in unit energy density also means an increase in production costs. If mass production is to be carried out now, the cost of a single battery will reach about 143 yuan, and it can only be applied to high-end machines.

Huang Xiuyuan asked curiously: "What do you think?"

Lu Xuedong expressed his thoughts: "The major energy consumers of mobile phones are the screen, GPU, CPU, and running memory. I suggest using a thermoelectric power generation module to recover part of the waste heat to improve battery life."

"Temperature difference waste heat recovery? This can only be used on high-end machines." Huang Xiuyuan spread his hands helplessly.

Whether it is high-energy batteries or temperature difference waste heat recovery, they can only be used on high-end phones for the time being. In fact, Tai Ah mobile phones can only be regarded as mid-range phones of Dragon Totem.

Lu Xuedong remembered one thing: "By the way, one more thing. Weixin and I discussed some market research situations and found that 47.3% of users use mobile phone cases."

"Mobile phone case?" Huang Xiuyuan really had no solution for this problem. Although the Dragon Totem mobile phone is not afraid of being dropped and scratched, the user's psychology is unclear.

"My idea is this, since users like to use cases, why don't we follow the trend and develop a mobile phone case with solar panels so that users can..."

Before he could finish speaking, a young researcher from Miao Guozhong's team on the side said with some embarrassment: "Mr. Lu, there is already a similar product."

In fact, the company that launched this product was Huangming Solar Company. They saw that mobile phones and laptops, such portable mobile devices, had obvious battery life problems. They launched the Dragon Totem mobile phone not more than a month after it was launched. The first solar cell phone case.

There are many products of the same type on the market now, such as solar anti-virus helmets, solar mobile phone cases, portable solar chargers, etc., which are designed to provide solar charging for outdoor activities.

"Haha..." Huang Xiuyuan laughed.

Lu Xuedong is also a little embarrassed. He often works as an otaku in the scientific research department and really doesn't know much about some situations in the market.

After a while, Huang Xiuyuan put away his smile: "Improving battery capacity is the key. In the future, mobile phone functions will become more and more powerful, and energy consumption will also increase accordingly."

"I'm obsessed with it." Lu Xuedong gave up the idea of ​​a solar cell phone case.

They gradually integrated composite glass disc technology and prepared to design a glass disc suitable for running memory.

According to the new generation of glass optical disc technology, ROM and RAM can be completely integrated, turning the two into one chip.

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