Abstract:
A curable epoxy composition comprising a polyvalent epoxy compound (A) which has a condensed polycyclic structure and/or biphenyl structure, an aromatic and/or alicyclic polyvalent glycidyl ester compound (B), and an active ester compound (C) is provided. According to the present invention, a curable epoxy composition which can form an electrical insulating layer which is excellent in desmearing ability, electrical characteristics, and heat resistance can be provided.
Abstract:
A flexible circuit connecting device is disclosed, including a base layer having a first surface and a second surface, and conductive traces having a grid-like structure and formed on the first surface and/or the second surface. The conductive traces of the above flexible circuit connecting device are nearly aligned with the base layer, and thus the probability of damage under a stress is reduced. Designed to be a grid-like structure, the conductive traces become more transparent, while satisfying a function of a connector. Besides, the above flexible circuit connecting device has a high density circuit trace, so that the size of the connector can be reduced and the interior space of the electronic components can be saved. In a manufacture process of the above flexible circuit connecting device, the manufacture process can be simplified, manufacture efficiency and production yield can be improved, and manufacture cost can be efficiently reduced.
Abstract:
The present invention discloses a phenoxycyclotriphosphazene active ester, a halogen-free resin composition and uses thereof. The phenoxycyclotriphosphazene active ester comprises at least 65 mol. % of a substance having the following structural formula. The halogen-free resin composition comprises 5-50 parts by weight of a phenoxycyclotriphosphazene active ester, 15-85 parts by weight of a thermosetting resin, 1-35 parts by weight of a curing agent, 0-5 parts by weight of a curing accelerator and 0-100 parts by weight of an inorganic filler. The present invention discloses introducing phenoxycyclotriphosphazene active ester into a thermosetting resin, reacting active esters with thermosetting resins, such as epoxy resin, without producing hydroxy groups, which not only satisfies the requirements on being halogen-free and flame retardancy, but also improves the electrical properties (decreasing and stabilizing Dk and Df) of the system, so as to make non-halogenation of high frequency and high speed substrate materials possible.
Abstract:
A substrate structure includes a dielectric layer, a metal foil, a patterned metal layer, a first patterned solder-resist layer and a second patterned solder-resist layer. The dielectric layer includes a first surface and a second surface, and the first surface has a plurality of recesses. The metal foil is disposed on the second surface. The patterned metal layer is disposed on the first surface, the patterned metal layer has a plurality of openings, and the openings are respectively corresponding to and expose the recesses. The first patterned solder-resist layer is filled in each of the recesses and corresponding to each of the openings. A top surface of the first patterned solder-resist layer is substantially coplanar with a top surface of the patterned metal layer. The second patterned solder-resist layer is disposed on the first patterned solder-resist layer and in the openings, and covers a portion of the patterned metal layer.
Abstract:
High-speed interconnects for printed circuit boards and methods for forming the high-speed interconnects are described. A high-speed interconnect may comprise a region of a conductive film having a reduced surface roughness and one or more regions that have been treated for improved bonding with an adjacent insulating layer. Regions of reduced roughness may be used to carry high data rate signals within PCBs. Regions treated for bonding may include a roughened surface, adhesion-promoting chemical treatment, and/or material deposited to improve wettability of the surface and/or adhesion to a cured insulator.
Abstract:
A wireless sensor platform and methods of manufacture are provided. The platform involves providing a plurality of wireless sensors, where each of the sensors is fabricated on flexible substrates using printing techniques and low temperature curing. Each of the sensors can include planar sensor elements and planar antennas defined using the printing and curing. Further, each of the sensors can include a communications system configured to encode the data from the sensors into a spread spectrum code sequence that is transmitted to a central computer(s) for use in monitoring an area associated with the sensors.
Abstract:
A printed wiring board includes a core substrate having a cavity, multiple electronic components accommodated in the cavity, and a build-up layer formed on the substrate and including an insulating interlayer such that the interlayer is covering the cavity. The components include a first component, second component and third component, the core substrate has a first projection structure partitioning the first and second components in the cavity and a second projection structure partitioning the second and third components in the cavity, and the cavity and the first and second structures are formed in the substrate such that T1
Abstract:
A flexible printed circuit board (PCB) has stretchability and durability. The flexible PCB includes: a first polymer substrate having flexibility, stretchability, or elasticity; a second polymer substrate having flexibility, stretchability, or elasticity; a conductive track disposed between the first and second polymer substrates and including metal nanowires; and a cured silane coupling agent which bonds the conductive track to at least one of the first and second polymer substrates.
Abstract:
Provided is a method for manufacturing a substrate having a concave pattern to be used for forming a high-definition pattern while suppressing wet-spreading and bleeding of a film-forming ink, provided is a composition to be used for manufacturing the substrate, and provided are a method for forming a conductive film, an electronic circuit, and an electronic device.The method for manufacturing a substrate having a concave pattern includes: (i) a step of applying, on a substrate 1, a composition containing a polymer having an acid-dissociable group and an acid generator to form a coating film 2 and (ii) a step of irradiating a predetermined portion of the coating film 2 with radiation. The method for forming a conductive film includes applying a conductive film-forming ink on the concave pattern formed in the exposed portion of the coating film 2 and heating the ink to form a pattern 6. The electronic circuit and the electronic device are provided by using the method for forming a conductive film.
Abstract:
Provided is a transparent conductive film including a transparent electrode layer composed of a patterned thin metal wire on at least one surface of a transparent film substrate. The line width of the wire is 5 μm or less. The wire includes a first metal layer and a second metal layer that is in contact with the first metal layer, in this order from a transparent film substrate side. Both of the first and second metal layers contain copper in an amount of 90% by weight or more. The total film thickness of the first and second metal layers is 150 to 1000 nm. The diffraction angle 2θ of the (111) plane of the second metal layer is less than 43.400° as measured using a CuKα ray as an X-ray source, and the first metal layer has crystal properties different from those of the second metal layer.