Abstract: Provided is a flexible printed circuit including a circuit layer with a desired circuit formed thereon, a base layer supporting the circuit layer, a conductive metal layer positioned on at least one side of the base layer, and an insulation film interposed between the base layer and the conductive metal layer. A hole is formed on the circuit layer and the base layer through punching work, and the insulation film covers one end of the hole.

Abstract: A drum-type washing machine including a housing, a water tub installed in the housing to contain wash water, a rotating tub rotatably installed in the water tub to rotate upon receiving a rotating force via a rotating shaft, a stator fixedly mounted to the water tub having an annular shape to allow the rotating shaft to penetrate therethrough, and a rotor mounted to the rotating shaft to rotate along with the rotating tub by interaction with the stator. The rotor has protrusions at an outer end thereof with protrusions having a predetermined height, and the protrusions being formed with communication holes communicating the inside and outside of the rotor with each other.