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Chapter 1472 On the same level as freedom and beauty

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    "0.125 cubic millimeters?"

    After hearing Zhuang Jianye¡¯s words, the tone of several experts present changed. They couldn¡¯t help but realize that the parameters given by Zhuang Jianye were really shocking.

    The reason for this is very simple, that is, the core of the chip-level atomic clock is not as simple as a few integrated circuits. Since the atomic clock uses the frequency of atomic oscillation to determine the accuracy of time, under the constraints of this physical law, no matter the shape of the atomic clock  How about, there must be at least two cavity structures inside, one is the vertical cavity where the atoms vibrate when the microwave light source is irradiated; the other is the interval cavity where the atoms are strongly separated.

    If you want to miniaturize an atomic clock, or even make it a chip, you must solve the problem of these two cavities. In particular, the gap cavity that separates the strong and weak atoms at the back is the key, because it involves whether strong atoms can hit the bullseye.  , which is an important component that makes components vibrate according to normal cycles, thereby determining the accuracy of time.

    It can be said that without this cavity, the atomic clock has no heart. No matter how good the atomic clock is, it can only be a decoration.

    The problem is that it is not difficult to make this type of cavity structure larger, but it is very difficult to make it smaller. Take the Free and Beautiful Room, which leads the world in this field, for example.

    As early as the early 1980s, the alkali metal vapor bubble structure was proposed as a spacer cavity for separating the strong and weak atoms of the atomic clock. However, due to process reasons, the glass bubble manufacturing process was not completed until the late 1980s. The spacer for separating the strong and weak atoms of the atomic clock.  The cavity system has been reduced from the original 27 square decimeters to 3.6 square centimeters, thus realizing the chip-based atomic clock.

    By the end of the 1990s, Liberty Beauty Room developed carbon dioxide laser induction technology for hollow glass fibers based on the glass bubble manufacturing process, further reducing the space between the strong and weak separation of atoms from more than 1 square centimeter to 5  Square millimeters.

    The size of the atomic clock is further reduced, which greatly improves the GPS technology level of the Free and Beautiful Room.

    Free America makes no secret of this at all. It openly publishes its results to the world, which naturally attracts praise and envy from all over the world. But there is only praise and envy, because Free America has combined these two craftsmanship technologies.  Get the prohibited export list.

    In other words, other countries in the world can look at it however they want, but they can¡¯t even think about getting it.

    As for whether someone can get pregnant after just a few glances, Free and Beautiful is not worried, because the process itself is very complicated when it comes to manufacturing and technology, and they are all concentrated in the semiconductor field.

    ??In addition to free and beautiful rooms, how many other places in the world today can compete in semiconductor manufacturing?

    Japan?

    She had been repaired a long time ago and knelt down and called daddy!

    South Korea?

    That¡¯s the high-end wage earner in the Free and Beautiful Room!

    Russia?

    I clicked on the wrong technology tree. The weight of the Russian atomic clock has been hovering around 50 kilograms. If the high-thrust rockets left over from the Soviet era were not really good, the Russian navigation satellites would have been put on the market long ago.

    As for Europe

    It took 15 years, but the result was that the volume of the cavity where the strong and weak atoms are separated could only be 1.5 square centimeters, which was only the level of the Free and Beautiful Room in the early 1990s.

    ?????????????????? The Europeans have not forgotten to put some gold on their faces, saying that the "Galileo" navigation satellite has the world's leading atomic clock technology. In fact, the Europeans have just started to develop chip-level atomic clocks.

    Not to mention the country, the comprehensive technical level is not as good as that of Russia. This is why many people in China place their hope on obtaining advanced atomic clock manufacturing technology through cooperation with Europe.

    The reason is very simple. Even if it cannot reach the level of the Free Beauty Room, which can be directly reduced to square millimeters, it is still a good improvement to be able to reach square centimeters.

    But unexpectedly, China's take-off not only reached the cubic millimeter level, but also further dropped to less than 1 square millimeter, reaching an astonishing 0.125 square millimeters

    You must know that this level is almost the same as the volume of the bubble cavity in the atomic clock used by the GPS3 navigation satellite recently announced by Free and Beautiful Room.

    Under such circumstances, how can we not make everyone present feel like they are in a dream? The domestic technical level in this area really exceeds that of Europe, and is on the same level as freedom and beauty?

    "Everyone, please see, this is the finished product of the rubidium atomic bubble we just produced"

    Just when everyone present was unable to extricate themselves from the shock of 0.125 square millimeters, Zhuang Jianye had already taken a prototype silicon wafer from his assistant, then pointed at the squares on it that were less than the size of a fingernail and said: "Our bubbles are empty  The cavity uses high-purity silicon wafers with a thickness of 523 microns.?It¡¯s one micron thick 7740 glass¡­¡±

    As he spoke, Zhuang Jianye pointed to several pieces of equipment running not far away and said: "The processing technology we use is the same as that of the chip. It cleans the silicon wafer, then performs dry oxygen and wet oxygen; then uses 193  The nanolithography machine processes circuits and cavities, and is further refined in a dedicated etching machine. The circuit is then laid out, rubidium atoms are injected, nitrogen and argon gases are flushed, and finally packaging and testing are performed.

    The whole process is the processing of a set of semiconductor chips. Thanks to our continuous investment in the semiconductor industry chain over the years, bubble cavities like this can now be fully localized. Of course, additional investment is required for mass production, such as  Ours is just a test workshop, and many of the equipment and processes are not perfect. We need professional workshops and equipment to optimize efficiency and cost"

    What Zhuang Jianye said before is not bad, it fully reflects the professionalism of a person in charge of a very large central enterprise, but as he talks, it doesn¡¯t sound right. No matter what professionalism or literacy, it can¡¯t compete with the importance of money.

    Fortunately, the head of the headquarters and below have long been accustomed to such hurtful things as Zhuang Jianye opening his mouth and talking about money. Especially the head of the headquarters. In so many years, he has never seen Zhuang Jianye's ears automatically turn on when he doesn't talk about money in front of him.  Ignoring Zhuang Jianye's later questions about money, he lowered his head to discuss with several headquarters leaders and experts, then reached out to take the plate of silicon wafers from Zhuang Jianye's hand. Under the guidance of several professionals, he used a special sight  Jing looked carefully and nodded: "Yes, it seems that China Tengfei has indeed worked hard in this area"

    With that said, he looked up at Zhuang Jianye, pointed at the silicon wafer in his hand and asked, "By the way, the other cavity of your chip-level rubidium atomic clock also uses this processing technology?"

    Zhuang Jianye nodded: "The general process follows the bubble cavity, but compared to the high power of the traditional inert gas light source and carbon dioxide laser light source, we use a new cavity laser as the light source for the oscillation separation of rubidium atoms"

    ¡°Then what is your power?¡± the head of the headquarters asked.

    Zhuang Jianye squinted and smiled: "It's not a lot, just 17 microwatts!"

    The head of the headquarters immediately changed his tone: "17 microwattsjust pay it back?"

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