Patent ID: 8686819

Claim:
A magnetic holding device adapted for holding a mask and a substrate for processing the substrate used in organic light emitting diodes, the magnetic holding device comprising: a substrate carrier adapted for receiving the substrate to be processed, the substrate carrier comprising: a permanent magnet adapted for generating a first magnetic field for holding the mask; a solenoid coil adapted for generating a second magnetic field adapted for reducing the first magnetic field by a superposition of the first magnetic field and the second magnetic field at the location of the mask for removing the mask, the solenoid coil being formed of at least one electrical conductor wound in a cylindrical shape around the permanent magnet; and a switching unit and a control unit, wherein a flow of current through the solenoid coil is provided by the switching unit which is controlled by the control unit; wherein the first magnetic field acts on the mask such that the mask is held in a fixed position when a current through the solenoid coil is off and the mask is released from the fixed position when the current through the solenoid is on.