摘要:
A plurality of wiring traces are formed on a base insulating layer, and a metal layer is formed on the opposite surface of the base insulating layer. Two adjacent wiring traces constitute a transmission line pair. The width of the wiring trace is set to not more than 250 μm, and the distance between the adjacent wiring traces is set to not less than 8 μm. The thickness of the base insulating layer is selected to cause differential impedance of the transmission line pair to be not less than 10 Ω and not more than 50 Ω.
摘要:
A plurality of wiring traces are formed on a base insulating layer, and a metal layer is formed on the opposite surface of the base insulating layer. Two adjacent wiring traces constitute a transmission line pair. The width of the wiring trace is set to not more than 250 μm, and the distance between the adjacent wiring traces is set to not less than 8 μm. The thickness of the base insulating layer is selected to cause differential impedance of the transmission line pair to be not less than 10Ω and not more than 50Ω.
摘要:
An optical sensor module is provided in which an engagement portion of a board unit is fitted in a groove of an optical waveguide unit and, even with the single engagement portion, the board unit is stably supported. An optical sensor module includes an optical waveguide unit, and a board unit mounted with an optical element and coupled to the optical waveguide unit. The optical waveguide unit includes a single edge extension portion axially extending along one side edge of an over-cladding layer, a board unit engagement groove provided in the single edge extension portion, and a projection provided on a side wall of the vertical groove and kept in abutment against an engagement portion of the board unit. The board unit includes an engagement portion fitted in the vertical groove, which abuts against the projection within the vertical groove.
摘要:
An adenine compound or its pharmaceutically acceptable salt as a medicament as shown following formula (1): wherein R1 is optionally substituted alkyl group, etc., X is oxygen atom, etc., A is 4 to 8 membered optionally substituted saturated or unsaturated heterocyclic group containing 1 to 2 hetero atoms selected from 1 to 3 nitrogen atoms, 0 to 1 oxygen atom and 0 to 1 sulfur atom, L1 and L2 are independently straight or branched chain alkylene, or a single bond, R2 is optionally substituted alkyl group, etc.
摘要:
A wafer-scale package structure in which a circuit board for rearranging electrode pads of a wafer is laminated on the wafer integrally. The circuit board can be divided into individual chip-size packages (CSPS) and which includes a layer of polyimide resin, and connection between the wafer and the circuit board is performed by solder bump, while the circuit board is stuck on the wafer with an adhesive.
摘要:
The present invention provides a mounted structure of circuit board which can be prepared by a simple method and exhibits a good heat dissipation from chip and undergoes relaxed heat stress and a multi-layer circuit board to be incorporated in the mounted structure. A novel mounted structure of circuit board is provided comprising a core material embedded in an insulating layer, said core material having a metal layer with a heat conductivity of not less than 100 W/m·K provided on at least one side of an Ni—Fe alloy foil, said insulating layer comprising a wire conductor provided and a semiconductor element mounted on at least one side thereof, characterized in that a solder metal member for heat conduction is provided interposed between said semiconductor element and said core material so that said semiconductor element and said core material are connected to each other. The mounted structure of circuit board comprises a 6-layer circuit board 2 having a laminate of three sheets of double-sided circuit boards 1 and a chip 13 connected to a circuit 5 on the uppermost layer. The core material 3 embedded in the intraboard insulating layer 4 in various double-sided circuit board 1 comprises a copper layer 3a having a heat conductivity of 393 W/·K provided on at least one side of an Ni—Fe alloy foil 25. The chip 13 and the underlying core material 3 are connected to each other with a solder metal member 10. The core material 3 on the horizontally adjacent double-sided circuit boards 1 are similarly connected to each other with the solder metal member 10.
摘要:
A low-thermal expansion circuit board comprising an insulating layer made of an organic polymer having thereon a wiring conductor for bare chip mounting, wherein the wiring conductor is an iron-nickel-based alloy layer having a copper layer on at least one side thereof; and a low-thermal expansion multilayer circuit board having a plurality of the low-thermal expansion circuit boards via an adhesive layer, the adhesive layer having through-holes filled with solder to connect the circuits layers.
摘要:
A fixing device includes a fixing member, pressure member, first temperature detector, and pressure adjustment mechanism. The pressure member presses against the fixing member to form a nip though which a recording medium bearing a toner image thereon is conveyed. The first temperature detector detects a temperature of the fixing member. The pressure adjustment mechanism performs an adjustment to contact pressure between the fixing and pressure members to be lower than an appropriate pressure for image fixing at the detected temperature of the fixing roller or separation of the pressure roller from the fixing member for a part of a period between a time at which a tailing end of a precedent recording medium is conveyed out from the nip and a time at which a leading end of a following recording medium is conveyed into the nip when a plurality of recording media are successively conveyed through the nip.
摘要:
A novel adenine compound represented by the formula (1): wherein A represents an (un)substituted aromatic carbocycle or (un)substituted aromatic heterocycle; L1, L2, and L3 each independently represents linear or branched alkylene, etc.; R1 represents (un)substituted alkyl, (un)substituted aryl, etc.; R2 represents hydrogen or (un) substituted alkyl; R3 represents (un)substituted alkyl, etc., provided that R3 may be bonded to L2 or L3 to form a nitrogenous saturated heterocycle; and X represents oxygen, etc.; or a pharmaceutically acceptable salt of the compound. The compound and salt are useful as a medicine.
摘要:
A wired circuit board is provided having a high-reliability conductive pattern formed thereon and mounting an electronic component thereon with high accuracy, and a method is provided for manufacturing the wired circuit board and mounting the electronic component thereon. An insulating layer including a mounting portion is formed on a metal supporting layer having a specular gloss of 150 to 500% at an incidence angle of 45°. A conductive pattern is formed on the insulating layer. By a reflection-type optical sensor, a defective shape of the conductive pattern is inspected. Then, an opening is formed by etching the portion of the metal supporting layer which is overlapping the mounting portion such that the mounting portion of the insulating layer exposed by etching has a haze value of 20 to 50%, whereby a TAB tape carrier is obtained. Thereafter, an electronic component is aligned with the mounting portion by a reflection-type optical sensor such that the electronic component is mounted on the mounting portion.