Patent ID: 6217661
Filing Date: 2001-04-17
Classification: C23C,H01J,Y10S

Abstract:
A plasma CVD apparatus for forming a film comprising:a vacuum chamber having a central axis;a gas introducing means for introducing a reactive gas into said vacuum chamber;means for introducing a microwave into said vacuum chamber in a direction parallel to said central axis thereof;a substrate holder for holding a substrate in said vacuum chamber;means for establishing a first magnetic field in said vacuum chamber in order to excite said reactive gas into a plasma by an interaction between said first magnetic field and said microwave where said substrate is located substantially at an electron cyclotron resonance point in said vacuum chamber where said microwave and first magnetic field satisfy the condition for electron cyclotron resonance; andmeans for establishing a second magnetic field in said vacuum chamber, said second magnetic field is such that said plasma is forced to move away from inner walls of said vacuum chamber by said second magnetic field.