摘要:
Embodiments of the present disclosure are directed to a method for forming a pattern on a surface of an insulating substrate and/or a ceramic article. The method comprises: forming a film on at least one surface of the insulating substrate, a material of the film comprising at least one of ZnO, SnO2, TiO2, or a combination thereof; and irradiating at least a part of the film by an energy beam to form the pattern in the film.
摘要:
A circuit board is provided with a metal wiring layer 12 on at least one principal surface of a ceramic sintered body 11, wherein the above-described metal wiring layer includes a first region 12a which is in contact with the principal surface and which contains a glass component and a second region 12b which is located on the first region 12a and which does not contain a glass component, the thickness of the first region 12a is 35% or more and 70% or less of the thickness of the metal wiring layer 12, and the average grain size in the first region 12a is smaller than the average grain size in the second region 12b.
摘要:
Surface metallization technology for ceramic substrates is disclosed herein. It makes use of a known phenomenon that many metal—metal oxide alloys in liquid state readily wet an oxide ceramic surface and strongly bond to it upon solidification. To achieve high adhesion strength of a metallization to ceramic, a discrete metallization layer consisting of metal droplets bonded to ceramic surface using metal—metal oxide bonding process is produced first. Next, a continuous metal layer is deposited on top of the discrete layer and bonded to it using a sintering process. As a result a strongly adhering, glass-free metallization layer directly bonded to ceramic surface is produced. In particular, the process can be successfully used to metalize aluminum nitride ceramic with high thermal and electrical conductivity copper metal.
摘要:
A material composition is formed with a carrier component and an additive component. The additive component has one or more ceramic additives. The carrier component and the additive component are present in a ratio by volume in the range from approximately 1:9 to approximately 7:3, preferably in the range from approximately 1:4 to approximately 2:1. More particularly, they are present in a ratio of approximately 1:1. The material composition may be formed as a foil or as a liquid, viscous, paste or gel material. The material composition may be used, inter alia, as oxidation protection and as a sealing element.
摘要:
In the case of a metal-ceramic substrate with a multilayered ceramic material in sheet form, and with at least one metallization that is provided on one surface side of the ceramic material and is joined to be ceramic material by direct bonding or active soldering, the ceramic material has at least one inner layer or base layer of a silicon nitride ceramic. The surface side of the ceramic material that is provided with the at least one metallization is formed by an intermediate layer of an oxidic ceramic applied to the base layer.
摘要:
A ceramic substrate metallization process for making a ceramic circuit substrate practically in an economic way by means of: washing a non-charged ceramic substrate and roughening the surface of the ceramic substrate by etching, and then coating a negatively charged (or positively charged), silicon-contained, nanoscaled surface active agent on the ceramic substrate, and then coating a positively charged (or negatively charged) first metal layer on the ceramic substrate.
摘要:
“Disclosed is high thermal conductivity materials used as heat dissipaters in microelectronic and optoelectronic devices and power generators. Also disclosed is development of composite materials with high thermal performance and low production costs for use in semiconductor devices as heat dissipaters and a process for producing this material. The materials have a thermal conductivity above 200 Wm−1K−1 and a coefficient of thermal expansion in the range of 2 to 10×10−6K−1 (measured in the temperature range of 20 to 300° C. in at least two directions). The composite material is constituted in three phases: a phase consisting mainly of graphite flakes; a phase comprising particles or fibers of a flake separating material, selected from a ceramic material (such as SiC, BN, AlN, TiB2 and diamond) and carbon fibers, of high thermal performance in at least one direction; and a phase consisting of a metal alloy.”
摘要:
The invention relates to a method of Silicon Carbide scanning or optical mirror production. In order to reduce the costs for manufacturing a scanning or optical mirror, according to the present invention, Silicon Carbide powder is pressed or stamped or isostatically pressed using an engineered stamp or tool to form the shape and structure of a scanning or optical mirror which is then in this embodiment sintered to provide a surface that will become the face surface of said scanning or optical mirror that is then coated or bonded with a suitably thick layer of in this embodiment Silicon material deposited by a thermal spray process onto said face surface of said scanning or optical mirror that is then polished to achieve the desired surface quality and/or roughness and/or flatness and then optical coated using coating technologies and materials to coat said face surface that will then become the reflective surface with suitable high reflective optical coatings specific to the wavelength or wavelengths that the finished Silicon Carbide scanning or optical mirrors will be used to reflect in final application/s.
摘要:
In one embodiment, a carbide-containing article includes a carbide body with an attached optional superabrasive layer. A braze metal coating is attached to a surface the carbide substrate. The coating primarily is made of particles of a metal having a melting point of less than 1200° C., the particles having a size of less than 0.1 mm. In another embodiment, a process for applying a braze metal coating to a carbide body of a superabrasive or other article includes depositing finely divided particles of a low melting point metal onto the carbide body by spraying the particles and gas onto the body at a velocity that is between 500 km/sec and 2 km/sec, with volumetric delivery of the particles being less than 50 grams per minute.
摘要:
In the case of a metal-ceramic substrate with at least one metallization, patterned by etching, on at least one surface side of a laminar ceramic material which includes a base substrate made of an aluminum-nitride or silicon-nitride ceramic and to which the metallization is applied by active soldering before patterning, an intermediate layer made of an oxidic ceramic is provided between the at least one metallization and the base substrate.