Abstract:
The present invention is directed to a cermet material comprising a matrix of metal or alloy with ceramic particles distributed therein. The cermet includes a glass binder for bonding between the metal or alloy and the ceramic particles.
Abstract:
A method of forming a colloidal dispersion includes providing a first continuous material flow, providing a second continuous material flow, combining the first and second continuous material flows, and moving a continuous flow of a colloidal dispersion in a direction downstream of the first and second continuous flows. The first continuous material flow includes one or more of a diluent (e.g., deionized water), a base, and an acid, and the second continuous material flow includes an abrasive particle solution. The first and second material flows are combined with a Reynolds number greater than about 4400 and less than about 25000 (e.g., about 7400 to about 25000). The colloidal dispersion includes the diluent, the base, the acid, and abrasive particles from the abrasive particle solution.
Abstract:
An ultrapure colloidal silica dispersion comprising colloidal silica particles having a mean or aggregate particle size from about 10 to about 200 nm, wherein the colloidal silica dispersion has less than 200 ppb, of each trace metal impurity disposed therein, excluding potassium and sodium, and have less than 2 ppm residual alcohol. A method for producing and using the same is also disclosed.
Abstract:
A water-soluble polymer is effective as a removal rate enhancer in a chemical mechanical polishing slurry to polish copper on semiconductor wafers or other copper laid structures, while keeping the etching rate low. The slurry may also include soft particles and certain metal chelating agents, or combinations thereof. The slurry can also comprise an abrasive particle, an organic acid, and an oxidizer.
Abstract:
A continuous CMP process for polishing multiple conductive and non-conductive layers on a semiconductor substrate. The continuous process comprises the steps of: (a) disposing a substrate on a platen; (b) polishing a first layer using both a mechanical means and a chemical means; and (c) polishing a second layer upon adjusting at least one parameter in either the mechanical means, chemical means, or both.
Abstract:
A lead free ferromagnetic article is disclosed. The article is a compacted composite having a heavy more dense constituent that is preferably ferrotungsten and a less dense second constituent that is either a metal alloy or a polymer. The ferromagnetic constituent is present in an amount sufficient to impart the article with ferromagnetism. The ferromagnetic property allows fragments of the article, such as a projectile, bullet or shaped charge liner to be separated from dirt or other environments.
Abstract:
A composite lead-free bullet is disclosed comprising a heavy constituents selected from the group of tungsten, tungsten carbide, carballoy, and ferro-tungsten and a second binder constituent consisting of either a metal alloy or a plastic blend.
Abstract:
Various types of articles having various deposition coatings applied using a gas vapor deposition process are provided. A system evacuates gases from the article or a deposition chamber prior to depositing a coating. The coating may be applied throughout the inside of an article or may be selectively applied to a portion of the article. The article may be moved relative to the gas jet or the gas may be moved jet relative to the article. Stencils may be used to pattern the coating on the surface of the article. The articles are coated in a pressure of approximately 5 millitorr. Articles may be cylindrically shaped, leadframes on a reel, substrates, or printed circuit boards.
Abstract:
There is provided an anodizable aluminum substrate having an increased breakdown voltage. The increase in breakdown voltage is achieved by selecting an appropriate aluminum alloy and appropriate processing parameters. Sealing the anodic film increases the breakdown voltage by decreasing corrosion. A preferred sealant is an epoxy cresol novolac having a low room temperature viscosity that cures to a highly cross-linked polymer.
Abstract:
There is provided a molded plastic electronic package having improved thermal dissipation. A thermal dissipator, such as a heat spreader or a heat slug is partially encapsulated in the molding resin. The thermal dissipator has a density less than that of copper and a coefficient of thermal conductivity that is constant or increases as the package periphery is approached.