Abstract:
Embodiments of the invention describe electrical contacts for integrated circuits and methods of forming using gas cluster ion beam (GCIB) processing. The electrical contacts contain a fused metal-containing layer formed by exposing a patterned structure to a gas cluster ion beam containing a transition metal precursor or a rare earth metal precursor.
Abstract:
A semiconductor device includes an insulating film formed on a semiconductor substrate, and a buried interconnect formed in the insulating film and made of copper or a copper alloy. A barrier metal layer made of a platinum group element or a platinum group element alloy is formed between the insulating film and the buried interconnect, and the barrier metal layer partially includes an amorphous structure having a degree of amorphousness that provides a relatively high barrier property.
Abstract:
The present invention relates to a platinum electrode structure for a semiconductor, having: a semiconductor substrate; a TiN/Ti gradient layer formed at an upper portion of the substrate; and a Pt thin film formed at an upper portion of the gradient layer. In addition, the present invention relates to a method for enhancing adhesion between a semiconductor substrate and a platinum electrode, by: depositing a Ti seed layer on the semiconductor substrate; forming a TiN/Ti gradient layer by irradiating nitrogen ion beam and injecting reaction gas to the surface of the Ti seed layer; and depositing a Pt thin film on the TiN/Ti gradient layer.
Abstract:
A titanium-tungsten barrier layer (202) is sputtered after active areas (122, 132) of a CMOS structure are exposed. An ion implant through the barrier layer and into the active areas disrupts the boundaries between the barrier layer and the underlying active areas. The implant can involve argon or, alternatively, silicon. The resulting structure is annealed. A conductor layer (204) of an aluminium-copper alloy is deposited. An antireflection coating (206) of TiW is deposited. The three-layer structure is then photolithographically patterned to define contacts and local interconnects. The ion implant before anneal results in less contact resistance, which is particularly critical for the barrier layer boundary with positively doped active areas.
Abstract:
Methods of controlling deposition of metal on field regions of a substrate in an electroplating process are provided. In one aspect, a dielectric layer is deposited under plasma on the field region of a patterned substrate, leaving a conductive surface exposed in the openings. Electroplating on the field region is reduced or eliminated, resulting in void-free features and minimal excess plating. In another aspect, a resistive layer, which may be a metal, is used in place of the dielectric. In a further aspect, the surface of the conductive field region is modified to change its chemical potential relative to the sidewalls and bottoms of the openings.
Abstract:
Methods for filling high aspect ratio features are provided herein. In some embodiments, method of filling a high aspect ratio feature formed in a substrate includes implanting a first species using a first plasma into first surfaces of a first layer formed along the surfaces of the high aspect ratio feature to form implanted first surfaces such that a second species subsequently deposited atop the first layer has an increased mobility along the implanted first surfaces relative to the first surfaces, wherein the first layer substantially prevents the second species from diffusing completely through the first layer; and subsequently filling the high aspect ratio feature with the second species.
Abstract:
Embodiments of the invention describe electrical contacts for integrated circuits and methods of forming using gas cluster ion beam (GCIB) processing. The electrical contacts contain a fused metal-containing layer (427) formed by exposing a patterned structure to a gas cluster ion beam (407) containing a transition metal precursor or a rare earth metal precursor.