Abstract:
It is provided an insulating substrate including through holes for conductors arranged in the insulating substrate. A thickness of the insulating substrate is 25 to 100 µ m, and a diameter of the through hole is 20 to 100 µ m. The insulating substrate includes a main body part and exposed regions exposed to the through holes and is composed an alumina sintered body. A relative density of the alumina sintered body is 99.5 percent or higher. The alumina sintered body has a purity of 99.9 percent or higher, and has an average grain size of 3 to 6 µ m in said main body part. Alumina grains are plate-shaped in the exposed region and the plate-shaped alumina grains have an average length of 8 to 25 µ m.
Abstract:
It is provided an insulating substrate including through holes for conductors arranged in the insulating substrate. A thickness of the insulating substrate is 25 to 100 µ m, and a diameter of the through hole is 20 to 100 µ m. The insulating substrate includes a main body part and exposed regions exposed to the through holes and is composed an alumina sintered body. A relative density of the alumina sintered body is 99.5 percent or higher. The alumina sintered body has a purity of 99.9 percent or higher, and has an average grain size of 3 to 6 µ m in said main body part. Alumina grains are plate-shaped in the exposed region and the plate-shaped alumina grains have an average length of 8 to 25 µ m.
Abstract:
Carte de circuit imprimé flexible, configurée pour recevoir des composants électroniques, comportant un élément flexible (10), électriquement isolant, configuré pour porter des pistes conductrices de connexion des composants, l'élément flexible étant en outre configuré pour être courbé selon une courbure (11), la carte comportant en outre un élément de renforcement (22), électriquement isolant, solidaire mécaniquement de l'élément flexible (10), s'étendant d'un côté de la courbure, et comportant deux parties : - une première partie (220) étant sensiblement plane, - une deuxième partie (221) présentant une courbure prédéfinie, disposée du côté de la courbure (11) de l'élément flexible (10), l'élément de renforcement (22) étant disposé de sorte à laisser une partie libre (11) pour l'élément flexible (10) pour être courbée selon ladite courbure.
Abstract:
A device embedded substrate (15) includes an insulating layer (12) including an insulating resin material, an electric or electronic device (4) embedded in the insulating layer (12), a metal film (9) coating at least one face of the device (4), and a roughened portion (10) formed by roughening at least part of the surface of the metal film (9). Preferably, the device embedded substrate (15) further includes: a conductive layer (6) pattern-formed at least on a bottom face (7), the bottom face (7) being one face of the insulating layer (12); and a bonding agent (3) made of a material different from the insulating layer (12) and joining the conductive layer (6) and a mounting face (8), the mounting face (8) being one face of the device (4). The metal film (9) is formed only on a face opposite to the mounting face (8), and the bonding agent (3) has a thickness smaller than a thickness from the metal film (9) to a top face (11), the top face (11) being the other face of the insulating layer (12).
Abstract:
Provided are a method for forming conductive pattern by direct radiation of an electromagnetic wave capable of forming fine conductive patterns on various kinds of polymer resin products or resin layers under a relatively low power by a simplified process, even without containing specific inorganic additives in the polymer resin itself, and a resin structure having the conductive pattern formed thereon. The method for forming the conductive pattern by direct radiation of the electromagnetic wave includes: forming a first region having a predetermined surface roughness by selectively radiating the electromagnetic wave on a polymer resin substrate containing carbon-based black pigment; forming a conductive seed on the polymer resin substrate; forming a metal layer by plating the polymer resin substrate having the conductive seed formed thereon; and removing the conductive seed and the metal layer from a second region of the polymer resin substrate, wherein the second region has surface roughness smaller than that of the first region.