Patent ID: 7338581
Filing Date: 2008-03-04
Classification: C23C,H01J

Abstract:
1. A sputtering apparatus comprising: a vacuum chamber; paired targets disposed in said vacuum chamber and having opposing surfaces facing one another such that a space is formed between said opposing surfaces of said paired targets; a substrate holder disposed in a position apart from said space formed between said opposing surfaces of said paired targets, said substrate holder being positioned so as to be nearly perpendicular to said opposing surfaces of said paired targets; a plasma source for generating reaction plasma by after-glow plasma in the vicinity of said substrate holder; a lead-in pipe connecting said plasma source to said vacuum chamber, said lead-in pipe connecting to said vacuum chamber at a lead-in pipe connection part; magnetic field generators arranged to generate a magnetic field parallel to an axial direction of said lead-in pipe; a soft magnetic material circumferentially surrounding at least one of said magnetic field generators; and a magnetic shield provided at said lead-in pipe connection part to magnetically shield an interior of said vacuum chamber from said plasma source; wherein said lead-in pipe includes an exterior pipe portion disposed outside said vacuum chamber, and an interior pipe portion disposed inside said vacuum chamber; wherein at least one of said magnetic field generators is disposed about said interior pipe portion; and wherein said soft magnetic material circumferentially surrounds said interior pipe portion by surrounding said at least one of said magnetic field generators disposed about said interior pipe portion.