Patent ID: 6099706
Filing Date: 2000-08-08
Classification: C23C,H01F,H01J

Abstract:
A magnetic film forming apparatus including a film forming source to emit film-forming particles, a substrate holder for holding a substrate on which a magnetic film is formed with said film-forming particles, and a magnetic field generating means for applying a magnetic field to said substrate; wherein said magnetic field generating means has a composition such that a ratio of an area of said substrate to an area surrounded said magnetic field generating means in a horizontal x-y plane parallel to a surface of said substrate is larger than about 0.14, and a skew angle of said magnetic field applied to said substrate is kept at less than 0.6 deg., by suppressing a vertical expansion of said magnetic field at places near both vertical peaks of said substrate; wherein said magnetic field generating means comprises two pairs of magnets, each pair of said magnets being composed of two bar-shaped magnets combined in a line apart from each other with a gap of distance d, said pair of magnets having respective pairs of magnetic poles, the direction of each pair of said magnetic poles being perpendicular to a longitudinal direction of said pair of magnets and having the same direction, and said two pairs of said magnets being arranged apart from each other with a distance L in said horizontal x-y plane, and substantially symmetrically to a vertical central y-axis of said substrate.