Scientists develop a convenient method for manufacturing graphene transistors

According to recent reports by physicists, German and Swedish scientists have discovered that graphene transistors can be fabricated using a similarly simple lithography process on silicon carbide crystals. It is not known how long the model scales down. How much, but the breakthrough is expected to allow them to develop computers based on graphene chips rather than carbon-based chips. The study was published in the journal Nature News. The conductivity and thermal conductivity of graphene far exceed that of silicon and other traditional semiconductor materials, and the size of transistors made of silicon is approaching the limit. Scientists believe that nano-scale carbon materials may be “life-saving straw”, and graphene is expected to replace it in the future. Silicon becomes an electronic component material. However, the main purpose of using graphene to make chips is not to "slim" the chip, but to use its high-efficiency conductivity to make it run faster without having to make the chip smaller. However, the use of graphene is also difficult to connect with other metals (such as electrodes), it is easy to break, and it is not a natural semiconductor. It is necessary to find a way to make it like a semiconductor to make the basic components of a computer - Transistor. German and Swedish scientists have now found a new approach. Previous studies have found that if the silicon carbide crystals are baked to the appropriate extent, the silicon atoms on the surface will be pushed out, leaving only a layer of carbon, which is graphene. Since the graphene layer will always be attached to the multi-layered silicon carbide (a semiconductor) underneath it, it is shown that the graphene material obtained in this way can be used to fabricate a transistor. The team then used a high-energy charged atom to etch the material into a tunnel to create the parts necessary for the transistor to operate: the source, the gate (gate), and the drain. Scientists have also discovered that when etching a tunnel in the middle, oxygen can transform the intermediate tunnel from the contact to the gate, and eventually they create a working transistor. Because scientists scaled up the size of transistors for research convenience, they still don't know how much the new transistor will actually increase in speed; nor how much it will run once it is scaled down. But they know that the ability to use graphene to make such a functioning transistor is a breakthrough that computer engineers have been hoping for, suggesting that a simple lithographic step can be made without the need for metal interconnects. Transistors, diodes, resistors, and final integrated circuits.

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