What kind of motor is a disc motor? What are the characteristics of disc permanent magnet high stepping motor?

Generally, the rotor and stator of a motor are both externally wrapped. In order to be thin, the disc motor has a stator on a flat substrate, and the rotor is covered on the stator. Generally speaking, the stator is a coil and the rotor is a permanent magnet or a disk with a permanent magnet attached. And they are generally brushless motors, and some are stepping motors. Like the drive motor in the floppy drive, it belongs to the disk motor. This kind of motor is thin and can be used for planar rotation of floppy drive.