Patent ID: 7686926
Filing Date: 2010-03-30
Classification: C23C,C23F,H01J,H01L

Abstract:
1. A process performed in a sputter chamber for depositing a barrier layer in a hole formed in a dielectric layer of a substrate placed on a pedestal electrode in said chamber in opposition to a target comprising a refractory metal, wherein the sputter chamber is arranged around an axis and includes a pedestal electrode for supporting the substrate, a planar target in opposition to the pedestal electrode, an RF coil wrapped around the axis, first and second electromagnetic coils wrapped around the axis at two different respective axial positions, and a third electromagnetic coil wrapped around the axis at a radial position different from that of the first electromagnetic coil, no pair of the first, second and third electromagnetic coils being coincident, at least one of the first, second, and third electromagnetic coils being disposed radially outside of the RF coil at an axial position occupied by the RF coil, said process comprising the sequentially performed steps of: (a) a nitride deposition step including (b) a refractory metal deposition step including (c) an etching step including