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3461 results about "Metal coating" patented technology

Porous power and ground planes for reduced PCB delamination and better reliability

Power and ground planes used in Printed Circuit Boards (PCBs) having porous, conductive materials allow liquids (e.g., water and / or other solvents) to pass through the power and ground planes, thus decreasing failures in PCBs (or PCBs used as laminate chip carriers) caused by cathodic / anodic filament growth and delamination of insulators. Porous conductive materials suitable for use in PCBs may be formed by using metal-coated organic cloths (such as polyester or liquid crystal polymers) or fabrics (such as those made from carbon / graphite or glass fibers), using metal wire mesh instead of metal sheets, using sintered metal, or making metal sheets porous by forming an array of holes in the metal sheets. Fabrics and mesh may be woven or random. If an array of holes is formed in a metal sheet, such an array may be formed with no additional processing steps than are performed using conventional PCB assembly methods.
Owner:GLOBALFOUNDRIES INC

Metal-clad polymer article

Metal-clad polymer articles containing structural fine-grained and / or amorphous metallic coatings / layers optionally containing solid particulates dispersed therein, are disclosed. The fine-grained and / or amorphous metallic coatings are particularly suited for strong and lightweight articles, precision molds, sporting goods, automotive parts and components exposed to thermal cycling although the coefficient of linear thermal expansion (CLTE) of the metallic layer and the substrate are mismatched. The interface between the metallic layer and the polymer is suitably pretreated to withstand thermal cycling without failure.
Owner:INTEGRAN TECH

Quick high-flexibility manufacturing method for ceramic circuit board

A quick high-flexibility manufacturing method for a ceramic circuit board comprises the following steps: irradiating laser on the surface of a ceramic matrix, and controlling the energy density of the laser to reach above the fracture threshold of the chemical bond of the compound containing active ions, so that chemical reaction occurs on the surface of the ceramic matrix, an active substance is separated out to serve as a chemical plating catalytic source, and the active substrate generated by the reaction and the matrix form chemical metallurgical bonding, wherein different laser sources are selected aiming at different ceramic materials according to the chemical bond energy of the ceramic material components, and the laser energy is controlled to reach the ceramic modified threshold by controlling the average power of laser output, pulse repetition frequency, scanning speed, defocusing amount, space between scanning line and scanning times; and the ceramic matrix modified by the laser is placed into a chemical plating solution to perform plating to form a metal coating. The surface of the ceramic is modified by the laser, so that a metal conductive layer and the matrix form chemical metallurgical bonding, the bonding force of the circuit board is greatly increased, and the heat-conducting property and the electric property are improved.
Owner:SHENZHEN SUNSHINE LASER & ELECTRONICS TECH CO LTD

Metal bond abrasive article comprising porous ceramic abrasive composites and method of using same to abrade a workpiece

The present invention relates to an abrasive article comprising a rigid backing having a first major surface and a second major surface; a plurality of ceramic abrasive composites each comprising a plurality of abrasive particles distributed throughout a porous ceramic matrix; and at least one metal coating, optimally, a set of metal coatings, which affixes the ceramic abrasive composites to at least one major surface of the backing. The present invention also relates to a method for grinding workpiece using the abrasive article, which comprises the steps of bringing the surface of the workpiece into contact with the abrasive article, applying a liquid on the interface between the workpiece and the abrasive article, moving the workpiece and the abrasive article with respect to each other.
Owner:3M INNOVATIVE PROPERTIES CO
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