It's hard to believe! Nano-level precision grinding can be achieved with just your hands!
Comrade Ye Hui, a special technician of the 699 Factory of the Second Academy of National Aerospace Science and Industry, can achieve manual precision machining, and can reduce the grinding error of the workpiece to the micron level, or even the nano level, which can be called the highest precision of the fitter.
The tantalum flakes he grinds have a surface roughness of 5 nanometers, which can only be detected by special instruments.
Grinding may seem simple, but not everyone can do it.
Just between pushing and pulling, it can't be too deep, and it's not too shallow, and the force is difficult to master.
And Ye Hui spent 20 years in order to "figure out" this just right strength.
It can be said that aerospace engineering can control the error in the "millimeter", relying on high-precision reference blocks, and Ye Hui is the one who makes the "standard".
Some people may say, so powerful, then rub a chip and take a look?
Here, Master Ye's 5 nanometers refers to the surface roughness of the parts, while the 5 nanometers of the lithography machine is the actual width of the chip wafer integrated circuit engraving line.
Therefore, it really can't be achieved by hand-rubbing the chip, and you still have to rely on the lithography machine.
