Patent ID: 8679306
Filing Date: 2014-03-25
Classification: C23C,H01J,H01L

Abstract:
1. A sputtering apparatus, comprising: a vacuum chamber; first and second plate-shaped targets; and first and second magnets that are magnetized in the thickness direction; wherein the first and second targets are arranged spaced apart at a predetermined distance in the vacuum chamber while the surfaces of the first and second targets are faced so as to be in parallel to each other, and the first and second magnets are arranged at a position of the rear surfaces of the first and second targets, wherein if either S pole or N pole is set to a first magnetic pole and the other is set to a second magnetic pole, then in the first magnet the first magnetic pole is faced toward the rear surface side of the first target, and in the second magnet the second magnetic pole is faced toward the rear surface side of the second target, and sputtered particles are discharged from an opening of a space between the first and second targets toward a surface of an object to be film-formed; and wherein a size of the first magnet is larger than that of the first target, and the first target is arranged inside an inner periphery of the first magnet, and a size of the second magnet is larger than that of the second target, and the second target is arranged inside an inner periphery of the second magnet; and wherein a first magnet member, in which the first magnetic pole is faced toward the rear surface of the first target, is arranged inside the first magnet; and a second magnet member, in which the second magnetic pole is faced toward the rear surface of the second target, is arranged inside the second magnet; and wherein among the strength of magnetic fields formed in the surfaces of the first and second targets, an absolute value of the strength of horizontal magnetic field components parallel to the surface of the first and second targets is set to at most 100 gauss and a difference between an upper limit and lower limit of the strength of vertical magnetic field components perpendicular to the surfaces of the first and second targets is set to at most 100 gauss.