摘要:
Method of manufacturing a structure which includes the steps of providing a structure having an insulator layer with at least one interconnect, forming a sub lithographic template mask over the insulator layer, and selectively etching the insulator layer through the sub lithographic template mask to form sub lithographic features spanning to a sidewall of the at least one interconnect.
摘要:
A method of reducing foreign material concentrations in an etch chamber having inner chamber walls is described. The method includes the step of etching a work piece in the etch chamber such that reaction products from the work piece having one or more elements form a first layer of reaction products that partially adhere to the inner chamber walls. A species is introduced into the etch chamber that increases the adhesion of the first layer of reaction products to the inner chamber walls.
摘要:
Methods are disclosed for forming dual damascene back-end-of-line (BEOL) interconnect structures using materials for the vias or studs which are different from those used for the line conductors, or using materials for the via liner which are different from those used for the trench liner, or having a via liner thickness different from that of the trench liner. Preferably, a thick refractory metal is used in the vias for improved mechanical strength while using only a thin refractory metal in the trenches to provide low resistance.
摘要:
The present invention relates to a process for improved interfacial adhesion of dielectrics using patterned roughing. Improved adhesion strength between layers and substrates can be achieved through increasing the roughness of the interface between the materials. Roughness may including any disturbance of an otherwise generally smooth surface, such as grooves, indents, holes, trenches, and/or the like. Roughing on the interface may be achieved by depositing a material on a surface of the substrate to act as a mask and then using an etching process to induce the roughness. The material, acting as a mask, allows etching to occur on a fine, or sub-miniature, scale below the Scale achieved with a conventional photo mask and lithography to achieve the required pattern roughing. Another material is then deposited on the roughened surface of the substrate, filling in the roughing and adhering to the substrate.
摘要:
Improved mechanical and adhesive strength and resistance to breakage of copper integrated circuit interconnections is obtained by forming a copper alloy in a copper via/wiring connection in an integrated circuit while minimizing adverse electrical effects of the alloy by confining the alloy to an interfacial region of said via/wiring connection and not elsewhere by a barrier which reduces or substantially eliminates the thickness of alloy in the conduction path. The alloy location and composition are further stabilized by reaction of all available alloying material with copper, copper alloys or other metals and their alloys.
摘要:
A method and structure for semiconductor structure includes a plurality of adjacent wiring levels, conductors within each of the wiring levels, and liners at least partially surrounding each of the conductors. The liners of adjacent wiring levels are made of different materials which have different etching characteristics and are selectively etchable with respect to one another. The liners can be tantalum, tungsten, etc. The liners surround at least three sides of the conductors. Each of the wiring levels has a first insulator layer which has a first dielectric material. The liners and the conductors are positioned within the first dielectric material. A second insulator layer has a second dielectric material over the first insulator layer. The first dielectric material has a lower dielectric constant than the second dielectric material. The first dielectric material can be silicon dioxide, fluorinated silicon dioxide (FSD), microporous glasses, etc. The second dielectric material can be one of nitrides, oxides, tantalum, tungsten, etc.
摘要:
Methods are disclosed for forming dual damascene back-end-of-line (BEOL) interconnect structures using materials for the vias or studs which are different from those used for the line conductors, or using materials for the via liner which are different from those used for the trench liner, or having a via liner thickness different from that of the trench liner. Preferably, a thick refractory metal is used in the vias for improved mechanical strength while using only a thin refractory metal in the trenches to provide low resistance.
摘要:
A method and structure for reducing the corrosion of the copper seed layer during the fabrication process of a semiconductor structure. Before the structure (or the wafer containing the structure) exits the vacuum environment of the sputter tool, the structure is warmed up to a temperature above the water condensation temperature of the environment outside the sputter tool. As a result, water vapor would not condense on the structure when the structure exits the sputter tool, and therefore, corrosion of the seed layer by the water vapor is prevented. Alternatively, a protective layer resistant to water vapor can be formed on top of the seed layer before the structure exits the sputter tool environment. In yet another alternative embodiment, the seed layer can comprises a copper alloy (such as with aluminum) which grows a protective layer resistant to water vapor upon exposure to water vapor.
摘要:
Methods and structures having pore-closing layers for closing exposed pores in a patterned porous low-k dielectric layer, and optionally a reactive liner on the low-k dielectric. A first reactant is absorbed or retained in exposed pores in the patterned dielectric layer and then a second reactant is introduced into openings such that it enters the exposed-pores, while first reactant molecules are simultaneously being outgassed. The second reactant reacts in-situ with the outgassed first reactant molecules at a mouth region of the exposed pores to form the pore-closing layer across the mouth region of exposed pores, while retaining a portion of each pore's porosity to maintain characteristics and properties of the porous low-k dielectric layer. Optionally, the first reactant may be adsorbed onto the low-k dielectric such that upon introduction of the second reactant Into the patterned dielectric openings, a reactive liner is also formed on the low-k dielectric.
摘要:
Interconnect structures are disclosed for forming dual damascene back-end-of-line (BEOL) structure using materials for the vias or studs which are different from those used for the line conductors, or using materials for the via liner which are different from those used for the trench liner, or having a via liner thickness different from that of the trench liner. Preferably, a thick refractory metal is used in the vias for improved mechanical strength while using only a thin refractory metal in the trenches to provide low resistance.