The unit of nanometers in the chip represents the distance between the transistors in the chip, which is called the gate length. The current chip is in the nanometer as a unit to express its degree of technology. Under normal circumstances, the smaller the grid length, the more advanced the process of the chip.
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For example, Huawei's Kirin 980 chip uses TSMC's 7-nanometer process. A Kirin 980 chip has more than 6.9 billion transistors. The previous generation of Kirin chips, Kirin 970, uses TSMC's 10nm process and has only 5.5 billion transistors, 1.4 billion less than Kirin 980.
Nanometer is a unit of length in chip making, and nanometer is a technology that uses length