摘要:
Embodiments described herein relate to removing material from a substrate. More particularly, the embodiments described herein relate to polishing or planarizing a substrate by a chemical mechanical polishing process. In one embodiment, a method of chemical mechanical polishing (CMP) of a substrate is provided. The method comprises exposing a substrate having a conductive material layer formed thereon to a polishing solution comprising phosphoric acid, one or more chelating agents, one or more corrosion inhibitors, and one or more oxidizers, forming a passivation layer on the conductive material layer, providing relative motion between the substrate and a polishing pad and removing at least a portion of the passivation layer to expose a portion of the underlying conductive material layer, and removing a portion of the exposed conductive material layer.
摘要:
A method for depositing a refractory metal nitride barrier layer having a thickness of about 20 angstroms or less is provided. In one aspect, the refractory metal nitride layer is formed by introducing a pulse of a metal-containing compound followed by a pulse of a nitrogen-containing compound. The refractory metal nitride barrier layer provides adequate barrier properties and allows the grain growth of the first metal layer to continue across the barrier layer into the second metal layer thereby enhancing the electrical performance of the interconnect.
摘要:
Embodiments described herein relate to removing material from a substrate. More particularly, the embodiments described herein relate to polishing or planarzing a substrate by a chemical mechanical polishing process. In one embodiment, a method of chemical mechanical polishing (CMP) of a substrate is provided. The method comprises exposing a substrate having a conductive material layer formed thereon to a polishing solution comprising phosphoric acid, one or more chelating agents, one or more corrosion inhibitors, and one or more oxidizers, forming a passivation layer on the conductive material layer, providing relative motion between the substrate and a polishing pad and removing at least a portion of the passivation layer to expose a portion of the underlying conductive material layer, and removing a portion of the exposed conductive material layer.
摘要:
A method and apparatus for atomic layer deposition (ALD) is described. The apparatus comprises a deposition chamber and a wafer support. The deposition chamber is divided into two or more deposition regions that are integrally connected one to another. The wafer support is movable between the two or more interconnected deposition regions within the deposition chamber.
摘要:
In the disclosed method, a transistor is fabricated by depositing an unpatterned layer of silicon on an insulating layer over a surface of a semiconductor substrate, with the silicon layer being deposited in an amorphous state to improve its uniformity in thickness and smoothness. Subsequently, while the silicon layer is still in the amorphous state, it is patterned by removing selected portions to form a gate. This patterning in the amorphous state improves the gates edge definition. Thereafter, the patterned amorphous silicon layer is heated to change it to polycrystalline silicon, thereby increasing its stability and conductivity.
摘要:
Embodiments of the invention relate to an apparatus and method of cyclical layer deposition utilizing three or more precursors. In one embodiment, the method includes providing at least one cycle of precursors to form a ternary material layer. Providing at least one cycle of precursors includes introducing a pulse of a first precursor, introducing a pulse of a second precursor, and introducing a pulse of a third precursor, wherein the pulses of two of the three precursors are introduced simultaneously or sequentially. In another embodiment, the method includes introducing a pulse of a first precursor, introducing a pulse of a second precursor, repeating the introduction of the first and the second precursors at least one time to form a binary material layer on the substrate surface, and introducing a pulse of a third precursor to form the ternary material layer.
摘要:
A platen supports a wafer during the deposition of tungsten, metal nitrides, other metals, and silicides in a chemicalvapor deposition reactor. A deposition control gas that includes a suitable inert gas such as argon or a mixture of inert and reactant gases such as argon and hydrogen is introduced through a restrictive opening into an ambient in the reactor. An exclusion guard aligned with the platen has an extension extending over a frontside peripheral region of the wafer. Deposition control gas is introduced under the exclusion guard extension and exits through a restrictive opening between the exclusion guard extension and a wafer frontside peripheral region. The restrictive opening provides a uniform pressure of deposition control gas at the edge and frontside of the wafer to prevent deposition on the wafer edge and backside.
摘要:
A platen supports a substrate on an interior platen region during the deposition of materials such as tungsten, metal nitrides, other metals, and silicides in a chemical vapor deposition ("CCVD") reactor. A deposition control gas composed of a suitable inert gas such as argon or a mixture of inert and reactive gases such as argon and hydrogen is introduced into the CVD reactor. Deposition control gas is preferably introduced through a restrictive opening in a gas orifice surrounding the platen interior region and exits near an edge of the substrate. The restrictive opening accommodates a uniform deposition control gas flow proximate to an edge of the substrate at a pressure greater than reactor pressure near the substrate edge. The deposition control gas substantially prevents process gas access to the substrate edge and backside. In one embodiment, the restrictive opening is formed by placing a restrictive insert within a gas groove surrounding the platen interior region. In another embodiment, the restrictive opening is formed by an exclusion guard substantially uniformly spaced from the edge of the substrate.
摘要:
A suitable inert gas such as argon or a mixture of inert and reactive gases such as argon and hydrogen is introduced onto the backside of wafers being processed in a CVD reactor during the deposition of tungsten or other metals, metal nitrides and silicides, to avoid deposition of material on the backside of the wafers being processed. Each process station includes a gas dispersion head disposed over a platen. A vacuum chuck including a number of radial and circular vacuum grooves in the top surface of the platen is provided for holding the wafer in place. A platen heater is provided under the platen. Backside gas is heated in and about the bottom of the platen, and introduced through a circular groove in the peripheral region outside of the outermost vacuum groove of the vacuum chuck. Backside gas pressure is maintained in this peripheral region at a level greater than the CVD chamber pressure. In this manner, backside gas vents from beneath the edge of the wafer on the platen and prevents the process gas from contacting the wafer backside. If the process gas is also to be prevented from contacting the periphery of the wafer frontside, a shroud is urged against the platen to direct the backside gas into a cavity formed between the shroud and the platen. This cavity contains the wafer frontside periphery, so that backside gas venting from between the shroud and the wafer frontside periphery excludes the process gas.