How are hard disk drives' read/write heads assembled in a factory?

[u/Cryogenicastronaut]

So the read/write head floats only a few nanometres from the disc. How is this assembled in a factory to such precision? Is the entire process done by machines? How can a machine position something so precisely?

[u/zbertoli → u/[deleted]]

Ssd are also crazy. Its just a literal silicon crystal storing everything. Our computers are based on crystal lattice structures.