Abstract:
A method for forming an aluminum containing conductor layer. There is first provided a substrate. There is then formed over the substrate a titanium layer employing an ionized metal plasma bias sputtering method. Finally there is then formed upon the titanium layer an aluminum containing conductor layer. By employing the ionized metal plasma bias sputtering method for forming the titanium layer, the aluminum containing conductor layer is formed with an enhanced (111) crystallographic orientation. The method is particularly useful for forming aluminum containing conductor layers with enhanced electromigration resistance, even under circumstances where there is formed interposed between a titanium layer and an aluminum containing conductor layer a titanium nitride layer.
Abstract:
An improved and novel process for fabricating unique interconnect conducting lines and via contact structures has been developed. Using this special self aligned dual damascene process, special interconnect conducting lines and via contacts are formed which have low parasitic capacitance (low RC time constants). The invention incorporates the use of double etch stop or etch barrier layers. The key process step of this invention is special patterning of the etch stop or etch barrier layer. This is the advantage of this invention over Prior Art processes that need a continuous, thick stop layer that has a etching selectivity to silicon dioxide, SiO.sub.2 (increasing parasitic capacitance). However, in this invention a self aligned dual damascene process and structure is presented that is easier to process and has low parasitic capacitance. Repeating the self aligned dual damascene processing steps, constructs multilevel conducting structures. This process reduces processing time, reduces the cost of ownership, (compatible with low dielectric constant materials) and at the same time produces a product with superior lines and via contact structures (by use of special etch stop or etch barrier layer patterning), hence improving reliability.
Abstract:
The present invention discloses a method for forming a DRAM capacitor that has improved charge storage capacity by utilizing a deposition process wherein alternating layers of doped and undoped dielectric materials are first deposited, a deep UV type photoresist layer is then deposited on top of the oxide layers such that during a high density plasma etching process for the cell opening, acidic reaction product is generated by the photoresist layer when exposed to UV emission in an etch chamber such that the sidewall of the cell opening is etched laterally in an uneven manner, i.e., the doped dielectric layer being etched more severely than the undoped dielectric layer thus forming additional surface area and an improved charge storage capacity for the capacitor formed.
Abstract:
The present disclosure provides one embodiment of a method to form an interconnect structure. The method includes forming a first dielectric material layer on a substrate; patterning the first dielectric material layer to form a plurality of vias therein; forming a metal layer on the first dielectric layer and the substrate, wherein the metal layer fills in the plurality of vias; and etching the metal layer such that portions of the metal layer above the first dielectric material layer are patterned to form a plurality of metal lines, aligned with plurality of vias, respectively.
Abstract:
A method of manufacturing a microelectronic device including forming a dielectric layer surrounding a dummy feature located over a substrate, removing the dummy feature to form an opening in the dielectric layer, and forming a metal-silicide layer conforming to the opening. The metal-silicide layer may then be annealed.
Abstract:
A copper interconnect structure in a semiconductor device including an opening formed in a dielectric layer of the semiconductor device, the opening having sidewalls and a bottom. A first barrier layer is conformally deposited on the sidewalls and the bottom of the opening. A first seed layer is conformally deposited on the first barrier layer. A second barrier layer is conformally deposited on the first seed layer. A second seed layer is conformally deposited on the second barrier layer and a conductive plug is deposited in the opening of the dielectric layer.
Abstract:
The present disclosure provides one embodiment of a method to form an interconnect structure. The method includes forming a first dielectric material layer on a substrate; patterning the first dielectric material layer to form a plurality of vias therein; forming a metal layer on the first dielectric layer and the substrate, wherein the metal layer fills in the plurality of vias; and etching the metal layer such that portions of the metal layer above the first dielectric material layer are patterned to form a plurality of metal lines, aligned with plurality of vias, respectively.
Abstract:
An integrated circuit structure and methods for forming the same are provided. The integrated circuit structure includes a semiconductor substrate; a dielectric layer over the semiconductor substrate; an opening in the dielectric layer; a conductive line in the opening; a metal alloy layer overlying the conductive line; a first metal silicide layer overlying the metal alloy layer; and a second metal silicide layer different from the first metal silicide layer on the first metal silicide layer. The metal alloy layer and the first and the second metal silicide layers are substantially vertically aligned to the conductive line.
Abstract:
An electroplating apparatus for depositing a conductive material on a semiconductor wafer includes a vessel for holding an electroplating bath, a support for holding a semiconductor wafer within the vessel and beneath a surface of the bath; first and second electrodes within the vessel, between which an electrical current may flow causing conductive material to be electrolytically deposited onto the wafer, a third electrode disposed outside of the bath for applying a static electric charge to the wafer, and an electrical power supply coupled with the third electrode.
Abstract:
A wafer is attached to a carrier by using an adhesive layer, and a portion of the adhesive layer is exposed adjacent to an edge of the wafer. After thinning the wafer, a protection layer is provided to cover the exposed portion of the adhesive layer. A plurality of dies is bonded onto the thinned wafer, and then the thinned wafer and the dies are encapsulated with a molding compound.