The size difference between a 28-nanometer chip and a 7-nanometer chip is mainly reflected in the number and density of transistors. Compared to the same area, a 7-nanometer chip can accommodate more transistors, so it can achieve higher integration and greater processing power.
In addition, the 7nm chip uses more advanced manufacturing processes and materials, making the circuit more compact and efficient with lower power consumption. Therefore, the 7-nanometer chip can achieve more powerful performance and longer battery life in a smaller volume than the 28-nanometer chip, which is suitable for more application scenarios.
In theory, 28 nanometers is 16 times larger than 7 nanometers.
28 nanometers is theoretically 16 times larger than 7 nanometers, because the nanometer is a unit of length, 28 nanometers is 4 times larger than 7 nanometers, and the area is a square relationship, so 4*4=16 times. Of course, the premise of this multiple is that the same design process is simply enlarged or reduced. In reality, it will not be more than 16 times, which will be affected by chip design and foundry process.