摘要:
Method for processing a semiconductor substrate in a chamber comprising the steps of establishing preprocess conditions in the chamber, executing a two-step plasma ignition, processing the substrate, executing a two-step plasma power down and executing a two-step substrate dechuck. A "softer" ignition of a plasma in two steps reduces DC bias spikes on the substrate. Reducing DC bias spikes reduces processing anomalies such as excess charge retention in the wafer after removing the chucking voltage and wafer repulsion and plasma discontinuity during processing. Additionally, the plasma ramp down after processing allows adequate time for discharging of residual charges in the wafer which allows for more reliable removal of the substrate from the chamber (dechucking).
摘要:
This invention relates to an apparatus comprising a Johnsen-Rahbek electrostatic chuck having a conductive stand-off pad and a method of fabricating the chuck. More specifically, the stand-off pad is made of a conductive polymeric material, such as a polyimide, which is disposed upon a semiconducting or partially conducting layer of the chuck. The polymeric material has a controlled resistivity within a range of about 10.sup.7 -10.sup.12 ohm-cm, which allows a wafer, or other workpiece, to be supported and retained upon the electrostatic chuck via the Johnsen-Rahbek effect.
摘要:
A method of depositing a metal nitride material, formed by the decomposition of an organometallic precursor, useful as a barrier layer for an integrated circuit using a conducting metal. More particularly, the invention provides a method of depositing a niobium nitride layer on a substrate for use in copper metallization. In one aspect of the invention an organometallic precursor having the formula Nb(NRR′)5, the formula (NRR′)3Nb═NR″, or combinations thereof, is introduced into a processing chamber in the presence of a processing gas, such as ammonia, and the metal nitride film is deposited by the thermal or plasma enhanced decomposition of the precursor on a substrate. The deposited niobium nitride layer is then exposed to a plasma to remove contaminants, reduce the film's resistivity, and densify the film.
摘要翻译:通过分解有机金属前体而形成的金属氮化物材料的方法,该有机金属前体可用作用于使用导电金属的集成电路的阻挡层。 更具体地,本发明提供了一种在用于铜金属化的基板上沉积氮化铌层的方法。 在本发明的一个方面,将具有式Nb(NRR')5,式(NRR')3 Nb = NR“的有机金属前体或其组合在处理气体的存在下引入处理室, 作为氨,并且金属氮化物膜通过在基底上的前体的热或等离子体增强的分解而沉积。 然后将沉积的氮化铌层暴露于等离子体以除去污染物,降低膜的电阻率并使膜致密化。
摘要:
The invention generally provides an apparatus and a method of removing metal oxides, particularly copper oxides and aluminum oxides, from a substrate surface. Primarily, the invention eliminates sputtering of copper oxide from the bottom of an interconnect feature onto the side walls of an interconnect feature, thereby preventing diffusion of the copper atom through the dielectric material and degradation of the device. The invention also eliminates sputtering of the copper oxides onto the chamber side walls that may eventually flake off and cause defects on the substrate. The method of reducing metal oxides from a substrate surface comprises placing the substrate within a plasma processing chamber, flowing a processing gas comprising hydrogen into the chamber, and maintaining a plasma of the processing gas within the chamber through inductive coupling. The method is preferably performed using a dual frequency etch chamber wherein adjustments are made in the processing gas flow, the RF powers and the exhaust pumping speeds to eliminate sputtering of the copper oxide and to maximize the reduction reaction.
摘要:
An electrostatic chuck is described with independent zone cooling that leads to reduced crosstalk. In one example, the chuck includes a puck to carry a substrate for fabrication processes, and a cooling plate fastened to and thermally coupled to the ceramic puck, the cooling plate having a plurality of different independent cooling channels to carry a heat transfer fluid to transfer heat from the cooling plate.
摘要:
A cleaning wafer cleans process residues from a support surface used in the processing of a substrate in an energized gas. The cleaning wafer has a disc having a liquid precursor derived polyimide layer formed directly on the disc by applying a liquid polyimide precursor to the disc. The polyimide layer has a thickness of less than about 50 microns, and a cleaning surface shaped to match a contour of the support surface. Process residues adhere to the cleaning surface and are cleaned from the support surface upon removal of the cleaning wafer therefrom.
摘要:
A method and apparatus for increasing the sensitivity of an in situ particle monitor. A light scattering technique, preferably using laser light, is employed to monitor particle concentrations within the processing chamber of a plasma-based substrate processing system. Particle concentrations are increased in the light field of the sensor by creating an electric or magnetic field in the processing chamber to concentrate the particles suspended therein.
摘要:
A lifting assembly can lift a substrate from a substrate support and transport the substrate. The lift assembly has a hoop sized to fit about a periphery of the substrate support, and a pair of arcuate fins mounted on the hoop, each arcuate fin comprising a pair of opposing ends having ledges that extend radially inward, each ledge having a raised protrusion to lift a substrate so that the substrate contacts substantially only the raised protrusion, thereby minimizing contact with the ledge, when the pair of fins is used to lift the substrate off the substrate support. The lifting assembly and other process chamber components can have a diamond-like coating having interlinked networks of (i) carbon and hydrogen, and (ii) silicon and oxygen. The diamond-like coating has a contact surface having a coefficient of friction of less than about 0.3, a hardness of at least about 8 GPa, and a metal concentration level of less than about 5×1012 atoms/cm2 of metal. The contact surface reduces contamination of a substrate when directly or indirectly contacting a substrate.
摘要:
A substrate support has a support structure and a coating on the support structure having a carbon-hydrogen network. The coating has a contact surface having a coefficient of friction of less than about 0.3 and a hardness of at least about 8 GPa. The contact surface of the coating is capable of reducing abrasion and contamination of a substrate that contacts the contact surface. In one version, the support structure has a dielectric covering an electrode. A plurality of mesas on the dielectric have a coating with the contact surface thereon.
摘要:
Apparatus for providing self-regulated gas flow between a wafer and a wafer support surface of a wafer support in a semiconductor wafer processing system. The apparatus consists of a gas inlet port extending through the wafer support for supplying gas to the wafer support surface and a plurality of exhaust ports, extending from the support surface through the wafer support, for exhausting the gas from the support surface, where the plurality of exhaust ports maintain a uniform backside gas pressure between the wafer and the wafer support surface.