Novellus Systems Inc. developed, manufactured, sold, and serviced semiconductor equipment used in the fabrication of integrated circuits. It was a supplier of chemical vapor deposition , plasma-enhanced chemical vapor deposition , physical vapor deposition , electrochemical deposition , ultraviolet thermal processing , and surface preparation equipment used in the manufacturing of semiconductors. Novellus Systems was founded in 1984 and is headquartered in San Jose, California. The company maintains engineering & manufacturing facilities in Tualatin, Oregon and San Jose, California. Also, Novellus has a component design and software development facility in Bangalore, India.In December 2011, Novellus agreed to be acquired by Lam Research for $3.3 billion. The acquisition completed in June 2012. Wikipedia.
Novellus Systems | Date: 2015-05-20
Porogen accumulation in a UV-cure chamber is reduced by removing outgassed porogen through a heated outlet while purge gas is flowed across a window through which a wafer is exposed to UV light. A purge ring having specific major and minor exhaust to inlet area ratios may be partially made of flame polished quartz to improve flow dynamics. The reduction in porogen accumulation allows more wafers to be processed between chamber cleans, thus improving throughput and cost.
Novellus Systems | Date: 2015-06-11
In one aspect, a system includes a generator configured to generate and tune a frequency of a supply signal. The system includes an auto-matching network configured to receive the supply signal and to generate an impedance-matched signal for use in powering a plasma system. In some implementations, during a first stage of an impedance matching operation, the generator is configured to tune the frequency of the supply signal until the generator identifies a frequency for which the reactance of the generator and the reactance of the load are best matched. In some implementations, during a second stage of the impedance matching operation, the auto-matching network is configured to tune a tuning element within the auto-matching network until the auto-matching network identifies a tuning of the tuning element for which the resistance of the generator and the resistance of the load are best matched.
Novellus Systems | Date: 2015-06-12
A tungsten nucleation film is formed on a surface of a semiconductor substrate by alternatively providing to that surface, reducing gases and tungsten-containing gases. Each cycle of the method provides for one or more monolayers of the tungsten film. The film is conformal and has improved step coverage, even for a high aspect ratio contact hole.
Novellus Systems | Date: 2015-01-28
Methods of depositing a film on a substrate surface include surface mediated reactions in which a film is grown over one or more cycles of reactant adsorption and reaction. In one aspect, the method is characterized by intermittent delivery of dopant species to the film between the cycles of adsorption and reaction.
Novellus Systems | Date: 2016-01-04
Methods of electroplating metal on a substrate while controlling azimuthal uniformity, include, in one aspect, providing the substrate to the electroplating apparatus configured for rotating the substrate during electroplating, and electroplating the metal on the substrate while rotating the substrate relative to a shield such that a selected portion of the substrate at a selected azimuthal position dwells in a shielded area for a different amount of time than a second portion of the substrate having the same average arc length and the same average radial position and residing at a different angular (azimuthal) position. For example, a semiconductor wafer substrate can be rotated during electroplating slower or faster, when the selected portion of the substrate passes through the shielded area.