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For example, the design standards of a PC chip and a mobile phone chip are not the same, an Intel CPU size of more than 100 square millimeters is very normal, high-end i7 and Xeon processors to reach more than 200 square millimeters is also common, because the PC is larger, better heat dissipation space, you can make the chip specifications bigger to improve performance.
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For mobile phone chips, a Snapdragon or Kirin processor can only control the area within dozens of square millimeters, because the space inside the phone is precious and cannot withstand too large a chip.
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If the CPU chip occupies one third of the phone area, the remaining battery, all kinds of sensors and cameras will be greatly affected, the heat and power consumption brought by the large chip will also increase sharply, and the battery life and use experience of the phone will be very poor.
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The size of the chip and the production process is also closely related, the more advanced the process, the smaller the chip area under the same conditions, because the size of the wafer used in the production of the chip is similar, so the larger the chip the higher the cost, the lower the yield.
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Since the chip design company and the manufacturing company are two different companies, the close coordination of the two teams is needed in the process of determining the chip size, and the most practical and cost-effective chip size is ultimately determined according to the performance and yield.
The 32nm transistor is already smaller than the flu virus, and now the 22nm product is reduced to 0.7 times.
The chip inside a processor is about the size of your thumbnail. Cores now often contain GPU parts that are about 1.5-2 times the size of your fingernail.