Abstract:
A board suitable for the formation thereon of a precision fine-line conductive metal circuit by the substractive method comprises a base plate prepared by molding a liquid-crystal polyester resin composition comprising (A) a melt-processable polyester (liquid-crystal polyester) capable of forming an anisotropic molten phase and (B) an inorganic filler, the base plate being treated to form a metallic coating on the surface thereof by sputtering, ion plating or vacuum deposition while heating said surface to a temperature of 60°C or above in a reduced pressure chamber.
Abstract:
Laminated synthetic mica articles are disclosed that have particular applicability as substrates in electronic components. The articles comprise a core of stacked and consolidated, synthetic mica sheets that are impregnated with resin, and a copper foil sealed to a face on the article. Adherence of the copper foil is enhanced by use of a micaceous facing layer and bonding sheet, both being resin-impregnated and the resin cure being advanced beyond the normal B-stage level before assembly. Insulation resistance is enhanced by providing an advanced resin coating on the copper foil before assembly. Use of a bismaleimide triazine and epoxy mixed resin is also disclosed whereby a transformation temperature (Tg) of about 200°C. is obtained.
Abstract:
A polyphenylene sulphide composition useful for plating is disclosed, comprising a polyphenylene sulphide resin, glass fibres, and potassium titanate fibres. Moulded articles of this composition, when plated after etching, provide a plated article which has a good appearance and good peel strength. Thus these plated articles can be used in outer applications, such as for electrical parts and automobile parts.
Abstract:
The invention is directed to polyimide based adhesives having a coefficient of thermal expansion (“CTE”) equal to or below 50 ppm/° C. The adhesives of the present invention contain a polyimide base polymer present in the overall adhesive in an amount from 25 to 95 weight percent. The polyimide base polymer has a glass transition temperature (“Tg”) in a range of from about 150 to about 300° C. and typically has a coefficient of thermal expansion above 50 ppm/° C. The polyimide based adhesives of the invention also contain an aramid micro fiber filler in an amount from 5 to 75 weight percent, based upon the total weight of the polyimide based adhesive. The fiber filler can be used to lower CTE of the overall adhesive to match (or nearly match) the CTE of other materials like metal, silicon wafers, other polymers (including polyimide) and the like.
Abstract:
PROBLEM TO BE SOLVED: To provide a fiber-reinforced composite material in which high transparency can be always maintained without no influence of temperature conditions or wavelengths, and to which various functionalities are given by a composite of the fibers and the matrix material. SOLUTION: A fiber-reinforced composite material comprising fibers having an average fiber diameter of 4 to 200 nm, and a matrix material, and 60% or above of light transmittance of a wavelength of 400 to 700 nm in 50 μm of thickness. Due to the fiber having an average fiber diameter smaller than the wavelength of a visual light (380 to 800 nm), little refraction of the visible light by the fibers may be generated, and further, scattering loss of the visible light at the interface between the fibers and the matrix material cannot easily occur even when the temperature or wavelength is changed. Therefore, high transparency of a visible transmittance of 60% or above in 50 μm of thickness can be stably maintained. COPYRIGHT: (C)2010,JPO&INPIT