Abstract:
Adhesion between a coating and a substrate may be improved by pre-treating the surface of the substrate with an aqueous detergent composition having a pH above 8 and comprising from 1 to 10% by weight phosphate and from 1 to 10% by weight silicate, before application of the coating.
Abstract:
The present invention provides methods of wet processing electronic components having surfaces containing tantalum. In the methods of the present invention, tantalum-containing electronic components are contacted with a tantalum processing fluid comprising a tantalum oxidizing solution containing an oxidizing agent and a fluorine ion producing agent.
Abstract:
An aluminum nitride substrate includes an aluminum nitride sintered body containing a rare earth oxide as a sintering additive component. In the aluminum nitride substrate, a surface thereof is machined so that arithmetic average roughness Ra is 0.5 nullm or less; an aggregate size of the sintering additive component present on the machined surface is 20 nullm or less; and a total aggregate area in a unit area of the machined surface is 5% or less. A metal thin film is deposited on such machined surface with good intimate contact properties, and furthermore deposition accuracy or the like is improved.
Abstract:
A laminated structure for electronic equipment includes a printed circuit board having copper foil, an undercoat plating layer made of tin or silver, formed on the printed circuit board, and a gold plating layer formed on the undercoat plating layer by electroless plating. Tin or silver is a metal which acts as an anticatalyst in electroless plating. After formation of the undercoat plating layer, the printed circuit board is dipped in catalyst-applying treating liquid to inhibit the anticatalyst.
Abstract:
The invention concerns a clothing article characterized in that: the textile support receives and adherence primer in the form of an aqueous calcium nitrate; the textile support with the adherence primer is subjected, entirely or partially, to a coating based on a foamed aqueous polymer; the foamed aqueous polymer only appears on the support outer part without going through the mesh so as not to produce contact with the corresponding part of the body.
Abstract:
Disclosed are new catalysts for electroless metallization deposition, particularly catalysts that can be selectively activated and may be free of palladium and/or tin. Catalysts of the invention are preferably employed for electroless copper deposition.
Abstract:
A method for manufacturing an electron-emitting device processing an electroconductive film upon which an electron-emission region is formed is characterized in that the formation process of formation of the electron-emission region includes a process of application of metal compound-containing material and film thickness controlling agent to the substrate. A method for manufacturing an electron source comprises a substrate, and a plurality of electron-emitting devices arrayed upon the substrate, wherein the electron-emitting devices are manufactured according to the method for manufacturing the electron-emitting device. A method for manufacturing an image-forming apparatus comprises a substrate, an electron source comprised of a plurality of electron-emitting devices arrayed upon the substrate, and an image-forming member, wherein the electron-emitting devices are manufactured according to the method for manufacturing an electron-emitting device.
Abstract:
A simple surface treatment process is provided which offers a high performance surface for a variety of applications at low cost. This novel surface treatment, which is particularly useful for Ti-6A1-4V alloys, is achieved by forming oxides on the surface with a two-step chemical process and without mechanical abrasion. First, after solvent degreasing, sulfuric acid is used to generate a fresh titanium surface. Next, an alkaline perborate solution is used to form an oxide on the surface. This acid-followed-by-base treatment is cost effective and relatively safe to use in commercial applications. In addition, it is chromium-free, and has been successfully used with a sol-gel coating to afford a strong adhesive bond that exhibits excellent durability after the bonded specimens have been subjected to a harsh 72 hour water boil immersion. Phenylethynyl containing adhesives were used to evaluate this surface treatment with a novel coupling agent containing both trialkoxysilane and phenylethynyl groups. The morphology of the interface between the metal surface and the adhesive was investigated using scanning electron microscopy and atomic force microscopy. Lap shear specimen failures were compared for adhesive bonds made with a conventional surface preparation and this new treatment. The test results at hot-wet environment demonstrate an approximately 90% retention of initial strengths. It is expected that this process will establish a low cost and high performance surface for not only high-speed commercial aircraft but also for other commercial applications.
Abstract:
The invention encompasses methods of forming insulating materials proximate conductive elements. In one aspect, the invention includes a method of forming an insulating material proximate a substrate comprising: a) chemical vapor depositing a first material proximate a substrate; b) forming cavities within the first material; and c) after forming cavities within the first material, transforming at least some of the first material into an insulative second material. In anther aspect, the invention includes a method of forming an insulating material proximate a substrate comprising: a) forming porous polysilicon proximate a substrate; and b) transforming at least some of the porous polysilicon into porous silicon dioxide. In yet another aspect, the invention includes a method of forming an insulating material between components of an integrated circuit comprising: a) chemical vapor depositing polysilicon between two components; b) electrochemical anodization of the polysilicon to convert the polysilicon into a porous mass having a first volume, the first volume comprising a polysilicon volume and a cavity volume, the cavity volume comprising greater than or equal to about 75% of said first volume; and c) oxidizing the porous polysilicon mass to transform the polysilicon into porous silicon dioxide having a second volume, the second volume comprising a silicon dioxide volume and a cavity volume, the cavity volume comprising less than or equal to about 50% of said second volume.
Abstract:
There is provided a method for partially plating on a base of synthetic resins or other materials including not only a single base but an assembly thereof comprising a number of chip bases for producing electronic and electric parts such as printed circuit board, lead frame insert molded circuit parts, etc. A method for partially plating on an assembly of bases 21 by the use of a plating catalyst comprising a coating process to coat a surface to be plated or not to be plated by means of a coating material selected from a water soluble polymer or hydrolyzable polymer either before or after a catalyst applying process to soak a container containing bases 21 in a plating catalyst bath.