Patent ID: 6333269
Filing Date: 2001-12-25
Classification: C23C,H01J,H01L

Abstract:
A plasma treatment method for supplying a microwave into a vacuum vessel by high-frequency producing means and for forming a magnetic field in said vacuum vessel by magnetic field forming means, to produce plasma in said vacuum vessel by the electron cyclotron resonance between said microwave and said magnetic field to treat a substrate with the produced plasma, said plasma treatment method comprising:a first step of introducing said substrate into said vacuum vessel and producing plasma to preheat said substrate before forming a thin film on said substrate; anda second step of activating a thin film deposition gas to produce plasma in said vacuum vessel and forming said thin film on said substrate with the produced plasma,wherein the position of said magnetic field forming means is changed between positions in said first and second steps to change the shape of said magnetic field so that magnetic lines of force of said field converge on a central portion of said substrate during said first step to a greater extent than during said second step, and lines of force of said field are substantially more uniform over the plane of said substrate during said second step than during said first step.