Patent ID: 6248223
Filing Date: 2001-06-19
Classification: C23C,H01J,H01L

Abstract:
A sputtering apparatus comprising:a vacuum vessel having an exhaust system;a cathode which is disposed in said vacuum vessel and has a target on a front face thereon; anda substrate holder which is used for disposing a substrate so as to be coaxial with and oppose said target in parallel, so that a film is deposited on an inner face of a hole formed in a surface of the substrate in conditions that a distance between the target and the substrate is substantially 150 to 360 mm and that a pressure of an interior of the vacuum vessel is substantially 1 mTorr or less,wherein said target of said cathode has a size Dt at which relationships that Q.sub.1 =N.multidot.Q.sub.2 and that N is not smaller than 0.7 are established between an angle Q.sub.1 satisfying tan Q.sub.1 =(Dt-Ds)/2L, and an angle Q.sub.2 satisfying tan Q.sub.2 =A/B,wherein Q.sub.1 is a maximum incident angle formed by a line connecting a point on a peripheral edge of the target and a point on a peripheral side of the substrate and a line extending perpendicular from the point on the peripheral side of the substrate, and Q2 is formed by a line connecting an inner corner portion of a bottom face of the hole to an opposite point on the opening edge of the hole with respect to a depth direction of the hole, andwhere A indicates a diameter of an opening of the hole in which the film is to be deposited, B indicates a depth of the hole, Ds indicates a size of the substrate, and L indicates the distance between said target and the substrate.