摘要:
The invention relates to a resin film having a high adhesiveness to other materials, an adhesive sheet, a circuit board and an electronic apparatus in which an adhesive layer and the resin film are firmly adhered. A resin film (1) includes a plurality of projected portions (10) each having a filler (9) in an apex portion (10a) and a resin material. The projected portions (10) are formed on at least one surface of a sheet portion (16).
摘要:
The invention relates to a resin film having a high adhesiveness to other materials, an adhesive sheet, a circuit board and an electronic apparatus in which an adhesive layer and the resin film are firmly adhered. A resin film (1) includes a plurality of projected portions (10) each having a filler (9) in an apex portion (10a) and a resin material. The projected portions (10) are formed on at least one surface of a sheet portion (16).
摘要:
An object of the invention is to satisfy all of a high-density wiring package, soldering thermal resistance, an insulating property and high-frequency transmission characteristics. The invention is a multi-layer wiring substrate having a lamination of a plurality of dielectric layers which are each provided with a wiring conductor made of a metallic foil on at least one of upper and bottom surfaces of the dielectric layer, the wiring conductors between which the dielectric layer is disposed being electrically connected with each other via a through conductor formed in the dielectric layer; on this occasion, the dielectric layers each individually are composed of a liquid crystal polymer layer and cladding layers made of a polyphenyleneether-type organic substance and formed on upper and bottom surfaces of the liquid crystal polymer layer.
摘要:
A circuit board (2) includes an insulation layer (7) where a via conductor (10) is embedded. The via conductor (10) includes: a first conductor portion (10a) having an lower portion narrower than an upper portion; and a second conductor portion (10b) which is formed immediately below the first conductor portion (10a), connected to the first conductor portion (10a), and has a maximum width greater than the upper end width of the first conductor portion (10a). The insulation layer (7) has a plurality of indentations (T1a, T1b) on the surface in contact with the via conductor (10). Convex portions (T2a, T2b) of the via conductor are arranged in the indentations (T1a, T1b).
摘要:
A circuit board (2) includes an insulation layer (7) where a via conductor (10) is embedded. The via conductor (10) includes: a first conductor portion (10a) having an lower portion narrower than an upper portion; and a second conductor portion (10b) which is formed immediately below the first conductor portion (10a), connected to the first conductor portion (10a), and has a maximum width greater than the upper end width of the first conductor portion (10a). The insulation layer (7) has a plurality of indentations (T1a, T1b) on the surface in contact with the via conductor (10). Convex portions (T2a, T2b) of the via conductor are arranged in the indentations (T1a, T1b).
摘要:
A circuit substrate includes a base and conductive layers disposed on lower and upper surfaces of the substrate. The base includes resin layers and the conductive layers overlapping with each other in a plan view. The resin layers include first resin layers and a second resin layer interposed between the first resin layers. The first resin layer has a filler and the second resin layer has no filler or a filler whose amount is 1 volume % or less and smaller than an amount of the filler in the first resin layer.
摘要:
A circuit board according to an embodiment of the present invention relates to a circuit board 2 including an insulating layer 7 and a via conductor 8 embedded in the insulating layer 7. The via conductor 8 has a narrowed portion 80 inclined with respect to a horizontal direction X.