Patent ID: 6030511
Filing Date: 2000-02-29
Classification: C23C,H01L

Abstract:
In a collimated sputtering method using a collimator under a condition of glow discharge occurring in a chamber; said collimator having penetrating apertures whose aspect ratio is equal to unity or greater and being located between a target and a substrate in said chamber;species, which are sputtered from said target due to said glow discharge and travel along a surface normal direction of said target and along approximate directions to said surface normal direction, being selectively reached to said substrate through said aperture of said collimator;said method comprising the steps of:controlling said condition of glow discharge to thereby increase a rate of said species traveling along longitudinal axis of said apertures of said collimatorsaid target being a single-crystal whose crystal plane is approximately perpendicular to a crystal axis having a shortest interatomic distance;and wherein said crystal plane is used as a sputtering surface, andsaid target has a hexagonal close-packed structure;and wherein a crystal plane of (1120) of said target is used as said sputtering surface.