Abstract:
An electrical assembly 600 comprising an electrical raft 200 and an electronic unit 300 is provided to a gas turbine engine 10. The electrical raft 200 has electrical conductors 252 embedded in a rigid material 220, which may be a rigid composite material. The electrical conductors 252 are in electrical contact with the electronic unit 300. When the electronic unit 300 is installed, at least a part 310 of it forms a part of a gas-washed surface of the engine 10. The electronic unit 300 is then easily accessible from the engine 10, and potentially complex and/or heavy access doors/panels may not be required.
Abstract:
The present invention relates to a process for preparing a bonding sheet for composing circuit substrate, comprising pre-treating glass fabrics with a pre-treating varnish having a same or close dielectric constant (DK) to glass fabrics being used. The present invention further relates to bonding sheets prepared by the process, as well as circuit substrate. The process for preparing circuit substrate of the invention, which has a lower cost, does not need to upgrade or adjust the equipments. The circuit substrates prepared thereby have less warp-wise and weft-wise difference in dielectric constant, and thus can effectively solve the problem of signal time delay.
Abstract:
Die Erfindung betrifft eine Leiterplatte (12) für Kraftfahrzeugbeleuchtungseinrichtungen die einen Schichtstapel aus einer ersten Metallschicht (36), einer darauf liegenden ersten dielektrischen Schicht (38), einer darauf liegenden zweiten Metallschicht (40), einer darauf liegenden zweiten dielektrischen Schicht (42)und einer darauf liegenden dritten Metallschicht (20) aufweist, wobei die dritte Metallschicht dazu eingerichtet ist, auf ihr angeordnete Leuchtdioden elektrisch zu kontaktieren und in den Leuchtdioden entstehende Wärme aufzunehmen und wobei die Leiterplatte (12) metallische Durchkontaktierungen (A, B, C, E) aufweist, welche die dritte Metallschicht (20) thermisch mit der zweiten Metallschicht (40) verbinden und Durchkontaktierungen (A, D, E) aufweist, welche die zweite Metallschicht (40) thermisch mit der ersten Metallschicht (36) verbinden, wobei, die erste dielektrische Schicht (38) ein Bestandteil einer kupferkaschierten Schicht aus einem faserverstärkten Harz ist, die zweite dielektrische Schicht (42) eine maximale 100 Mikrometer dicke Schicht aus faserverstärktem Harz ist, die Durchkontaktierungen mit einer Metallisierung versehene Bohrungen sind und die dritte Metallschicht (20) eine aufgepresste Metallfolie aufweist.
Abstract:
A method for removing a metal from a single-thread fabric for making a pattern, characterized in that said single-thread fabric is a square-mesh metallized and etching laser made fabric.
Abstract:
The present invention relates to a thermoset resin composition, and a prepreg and a laminate for a printed circuit board manufactured therefrom. The thermoset resin composition comprises the following components: a phosphorus-containing polyphenyl ether resin having low molecular weight, an epoxy resin, a cyanate resin and an accelerator. The prepreg manufactured using the resin composition comprises a base material and the thermoset resin composition adhered to the base material by impregnation and drying. The laminate for a printed circuit board manufactured using the resin composition comprises a plurality of laminated prepregs, a metal foil covering one or two faces of the laminated prepregs by pressing, with each prepreg comprising a base material and the thermoset resin composition adhered to the base material by impregnation and drying. The thermoset resin composition of the present invention has properties such as a low dielectric constant and a dielectric dissipation factor, high heat resistance, a high glass transition temperature, and flame retardancy, etc. The laminates for a printed circuit board manufactured using same have excellent metal foil peel strength, heat resistance and dielectric properties, and are suitable for high frequency and high speed electronic circuit boards.
Abstract:
The present invention provides a rigid raft (702) formed of rigid composite material (220). The raft has an electrical system and/or a fluid system embedded therein. The raft further has a tank (704) for containing liquid integrally formed therewith. The tank can be formed of the rigid composite material. The tank can be for a gas turbine engine.
Abstract:
The invention relates to an electrode substrate for an optoelectronic device, comprising a woven fabric (10) containing electrically conducting (14) and non-conducting (12) fibers and a coating (16) from a transparent, electrically non-conducting polymer material, the woven fabric being embedded in the coating such that sections (20; 22, 24) of the conducting fibers project from the non-conducting polymer material of the coating at least on one side of the coating, wherein the coating is provided with a transparent and electrically conducting conductive coating (26, 28) such that the projecting sections cooperate with the conductive coating, in particular engage and/or protrude in the conductive coating, to establish electrical contacts, wherein the conductive coating has a layer thickness that is smaller than a diameter, in particular a mean diameter, of the electrically conducting and electrically non-conducting fibers of the woven fabric.
Abstract:
The present invention provides a rigid raft (702) formed of rigid composite material (220). The raft has an electrical system and/or a fluid system embedded therein. The raft further has a tank (704) for containing liquid integrally formed therewith. The tank can be formed of the rigid composite material. The tank can be for a gas turbine engine.