Patent ID: 6797968
Filing Date: 2004-09-28
Classification: H01J

Abstract:
An ion beam processing method comprising the steps of extracting ions from an ion source as an ion beam by extraction electrode, analyzing ions by a mass analysis magnet apparatus for carrying out mass analyzing of the ions thus extracted and by a mass analysis slit for the ions that are mass analyzed by said mass analysis magnet apparatus to pass through, transporting the ions drifted or accelerated/decelerated, and implanting the ions in a substrate, a beam line structure extending from said ion source which generates the ions to said substrate to be implanted by the ions and including said mass analysis slit placed on said beam line structure between a rear section of said mass analysis magnet apparatus and said substrate, the analyzed ions passed through said mass analysis slit being directly implanted into said substrate by drifting transportation or being implanted into said substrate after acceleration or deceleration, and an acceleration electrode or a deceleration electrode placed on said beam line structure between a rear section of said mass analysis slit and said substrate, said ion beam being carried from said ion source to said substrate through said beam line structure, said ion beam being continuously surrounded with multiple magnet assemblies which generate cusp magnetic fields, further comprising the steps of:confining the ion beam by the cusp magnetic fields jointed continuously to each other, said multiple magnet assemblies being disposed from a front section of the said mass analysis magnet apparatus being implanted into said substrate after acceleration or deceleration, and an acceleration electrode or a deceleration electrode placed on said beam line structure between a rear section of said mass analysis slit and said substrate, said ion beam being carried from said ion source to said substrate through said beam line structure, said ion beam being continuously surrounded with multiple magnet assemblies which generate cusp magnetic fields, some sections of said beam line structure being continuously surrounded with multiple magnet assemblies which generate cusp magnetic fields, further comprising the step of: confining the ion beam by the cusp magnetic fields formed by a series of said multiple magnet assemblies disposed in the beam line structure from a vicinity of the extraction electrode through the mass analysis magnet apparatus and the mass analysis slit to a vicinity of the substrate.