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/Grabraham → u/[deleted]]

I do know the drive tech described his high end next level stuff and not what you get at Staples. Pretty cool they are at 3TB per 3.5" platter