Patent ID: 9721771
Date: 2017-08-01
CPC Classifications: C23C,H01J

Claim:
1. A film forming apparatus for forming a thin film on an object by sputtering, comprising: a processing chamber; a gas supply unit configured to supply a gas into the processing chamber; a stage disposed in the processing chamber, the stage having a center coinciding with a central axis extending in a vertical direction and configured to cool the object to about −50° C. or below; at least one holder each of which is configured to hold a target, extending in an annular shape, above the stage in the processing chamber; a power supply configured to generate a voltage to be applied to the target; at least one magnet provided outside the processing chamber to face the target; a magnet rotation unit configured to rotate the at least one magnet about the central axis; at least one shutter provided between the target and the stage, having at least one opening through which a part of the target is exposed to the stage; a shutter rotation unit configured to rotate the at least one shutter about the central axis; and a control unit configured to control the magnet rotation unit and the shutter rotation unit to rotate in synchronization with each other about the central axis in a state that the at least one opening is positioned on a straight line connecting the stage and the at least one magnet.