摘要:
Apparatus and method for metal electroplating. The apparatus for metal electroplating includes an electroplating tank for containing an electrolyte at a first temperature, a substrate holder for holding a semiconductor substrate, and a heater for heating the portion of the electrolyte adjacent to the substrate holder to a second temperature higher than the first temperature.
摘要:
Interconnects with harmonized stress and methods for fabricating the same. An interconnect comprises a substrate having a conductive member. A composite low-k dielectric layer interposed with at least one stress-harmonizing layer therein overlies the substrate. A conductive feature in the composite low-k dielectric layer passes through the at least one stress-harmonizing layer to electrically connect the conductive member.
摘要:
A method for alternately electrodepositing and electro-mechanically polishing to selectively fill a semiconductor feature with metal including a) providing an anode assembly and a semiconductor wafer disposed in spaced apart relation including an electrolyte there between the semiconductor wafer including a process surface including anisotropically etched features arranged for an electrodeposition process; b) applying an electric potential across the anode assembly and the semiconductor wafer to induce an electrolyte flow at a first current density to electrodeposit a metal filling portion onto the process surface; c) reversing the electric potential to reverse the electrolyte flow at a second current density to electropolish the process surface in an electropolishing process; and, d) sequentially repeating the steps b and c to electrodeposit at least a second metal filling portion to substantially fill the anisotropically etched features.
摘要:
A method for improving an electrodeposited metal film uniformity and preventing metal deposition and peeling of deposited metal from an electrode during an electrodeposition and electropolishing process including providing a first anode electrode assembly and a semiconductor wafer plating surface disposed in an electrolyte bath including a plating metal for deposition onto the semiconductor wafer plating surface; providing at least one additional anode electrode assembly including the plating metal disposed peripheral to the first anode electrode assembly for selectively applying the cathodic electrical potential during an electropolishing process; and, periodically alternating between an electrodeposition process and electropolishing process with respect to the semiconductor wafer plating surface such that the plating metal is preferentially plated onto the at least one additional electrode assembly.
摘要:
A method for fabricating metal gates in deep sub-micron CMOS devices. The method blanket deposits a transition metal nitride layer on top of a gate dielectric layer for forming gate electrodes for both a PMOS and an NMOS device. After a cap layer is deposited on top of the gate electrode for PMOS, a rapid thermal annealing process is carried out to drive out nitrogen from the transition metal nitride on top of the NMOS. Gate electrodes having different work functions on top of the PMOS and NMOS are thus achieved simultaneously by the same fabrication process.
摘要:
A new method is provided to create metal bumps on a surface, metal contact pads have been provided in this surface. A layer of dielectric is deposited over a surface; an opening is created in the layer of dielectric that aligns with the contact pad. A barrier layer is deposited over the layer of dielectric including the inside of the opening; a seed layer is deposited over the barrier layer. The seed layer is selectively removed from above the layer of dielectric leaving the seed layer intact and deposited over the inside surfaces of the opening, the barrier layer is left intact over the layer of dielectric and inside the opening. Using Electrical Chemical Deposition (ECD) technology, the metal bump is now selectively grown thereby eliminating previously experienced disadvantages when creating metal bumps of decreased pitch and mask alignments and resolution.
摘要:
A process for fabricating a tantalum nitride diffusion barrier for the advanced copper metallization of semiconductor devices is disclosed. The process comprises the steps of first preparing a semiconductor device fabricated over the surface of a silicon substrate having a component with a fabricated contact opening. Before the formation of the copper contact by deposition, the process performs a tantalum nitride low-pressure chemical-vapor-deposition procedure that deposits a layer of tantalum nitride thin film over the surface of the device substrate. After the copper deposition, a photoresist layer is subsequently fabricated for patterning the deposited copper contact and tantalum nitride layers, whereby the deposited thin film of tantalum nitride is patterned to form the thin film as the metallization diffusion barrier for the semiconductor device. The tantalum nitride low-pressure chemical-vapor-deposition procedure includes depositing a layer of tantalum nitride utilizing a metal-organic precursor terbutylimido-tris-diethylamido tantalum (TBTDET) in a cold-wall low pressure reactor with a base pressure of about 10.sup.-5 torr. The source of the metal-organic precursor is vaporized at a temperature of about 40.degree. to 50.degree. C. The typical deposition pressure is about 20 mtorr. Tantalum nitride layer of low carbon content and low resistivity may thus be formed in the disclosed chemical-vapor-deposition procedure having effective capability against copper diffusion.
摘要:
A method and system is provided for efficiently varying the composition of the metal interconnects for a semiconductor device. A metal interconnect according to the present disclosure has an intermediate layer on a dielectric material, the intermediate layer having a relatively higher concentration of an impurity metal along with a primary metal, the impurity metal having a lower reduction potential than the primary metal. The metal interconnect has a main layer of the metal alloy interconnect on top of the intermediate layer and surrounded by the intermediate layer, the main layer having a relatively higher concentration of the primary metal than the intermediate layer, wherein the intermediate and main layers of the metal alloy interconnect each maintains a material uniformity.
摘要:
Semiconductor devices and methods for forming the same in which damages to a low-k dielectric layer therein can be reduced or even prevented are provided. A semiconductor device is provided, comprising a substrate. A dielectric layer with at least one conductive feature therein overlies the substrate. An insulating cap layer overlies the top surface of the low-k dielectric layer adjacent to the conductive feature, wherein the insulating cap layer comprises metal ions.
摘要:
A composition and process suitable for the passivation of metal lines, layers or surfaces, particularly for the passivation of copper in the fabrication of integrated circuit devices on wafer substrates. The process includes providing a novel composition solution in contact with a copper line, layer or surface on a substrate as the copper is subjected to chemical mechanical planarization (CMP). The composition includes reactive cations of a displacement metal which are suspended in solution and spontaneously displace the copper atoms in the copper in an oxidation/reduction reaction. The oxidized and displaced copper cations are carried away by the composition solution, and the newly-incorporated metal atoms in the copper substantially inhibit or prevent growth of copper oxides in the copper.