Abstract:
A printed circuit board on which a connector is mounted includes an insulating layer through which holes are formed and a supporting layer. An upper surface of the supporting layer is attached to the connector. The supporting layer is disposed on an upper surface of the insulating layer, is extended from the upper surface of the insulating layer to a lower surface of the insulating layer, and passes through the holes in order to support the connector. The holes are arranged in a plurality of columns each being parallel to a longitudinal direction of a lateral surface of the connector.
Abstract:
A wiring board 10 comprises a wiring board main body 21 having a dielectric layer 25 that is the first dielectric layer, an electronic component attaching pad 24 having a connection surface 24A with which an electronic component 11 is connected, and disposed inside the dielectric layer 25, a dielectric layer 31 that is the second dielectric layer laminated on the dielectric layer 25, and the via holes 27 and 33 and a wiring pattern 28 provided on the dielectric layers 25 and 31 and electrically connected with the electronic component attaching pad 24, wherein a warp reduction member 22 for reducing a warp of the wiring board main body 21 is disposed inside the dielectric layer 25.
Abstract:
The invention relates to a circuit board having a light source for illumination purposes, having at least one LED electrically conductively connected to conductors of the circuit board, and the light thereof being converted into directed light by means of at least one mirror disposed on the circuit board, characterized in that the mirror is designed as a reflective coating printed onto the circuit board.
Abstract:
An LED heat-conducting substrate and its thermal module wherein the composite heat-conducting substrate is incorporated by multiple heat-conducting wires or fibers and insulating material. Said wires or fibers are arranged at interval, and penetrate the front and rear faces. The wires or fibers are segregated by insulating material. An electrode pad is incorporated onto the front face of the composite heat-conducting substrate, and is electrically connected with the electrode pin of LED unit. A heat-conducting pad is incorporated and kept in contact with the heat sink of the LED component for heat conduction. An insulating layer is incorporated onto the rear face of the composite heat-conducting substrate, and located correspondingly to the electrode pad. The LED heat-conducting substrate and thermal module can be constructed easily for high heat conduction in the thickness direction and high electrical insulation in the direction of plane, enabling quick heat transfer to the heat-sinking component.
Abstract:
An electronic card that includes at least two superimposed conducting layers with an insulation layer between the two conducting layers, the two conducting layers each including a utility conducting portion and a conducting portion at the periphery of the utility conducting portion with an insulating portion between the conducting portions, the insulating portion of a first of the two layers being offset relative to the insulating portion of the second of the layers. An aircraft includes a housing in which at least one such card is provided.
Abstract:
A mounting structure is provided that can suppress flux from spreading, secure a connecting strength between a circuit board and an electronic component with underfill, and achieve a stable electrical connection between lands and terminals. The mounting structure is configured with a flat electronic component and a circuit board, and a plurality of lands provided on the undersurface of the electronic component and a plurality of terminals provided on the mounting surface of the circuit board so as to correspond to the plurality of lands are bonded with solder. The circuit board includes a means for holding flux separated from the solder in the proximity of at least one of the plurality of terminals.
Abstract:
A wiring board 10 comprises a wiring board main body 21 having a dielectric layer 25 that is the first dielectric layer, an electronic component attaching pad 24 having a connection surface 24A with which an electronic component 11 is connected, and disposed inside the dielectric layer 25, a dielectric layer 31 that is the second dielectric layer laminated on the dielectric layer 25, and the via holes 27 and 33 and a wiring pattern 28 provided on the dielectric layers 25 and 31 and electrically connected with the electronic component attaching pad 24, wherein a warp reduction member 22 for reducing a warp of the wiring board main body 21 is disposed inside the dielectric layer 25.
Abstract:
A dummy trace portion is provided in a region between at least a suspension board with circuit on one end side and a support frame of a suspension board assembly sheet with circuits. A base insulating layer is formed on a support substrate in the dummy trace portion. A plurality of conductor traces are formed on the base insulating layer, and a cover insulating layer is formed on the base insulating layer to cover each conductor trace. At least one of the base insulating layer and the cover insulating layer in the dummy trace portion has a groove.
Abstract:
A mounting region is provided at an approximately center of one surface of an insulating layer. A conductive trace is formed so as to outwardly extend from inside of the mounting region. A cover insulating layer is formed in the periphery of the mounting region so as to cover the conductive trace. A terminal of the conductive trace is arranged in the mounting region, and a bump of an electronic component is bonded to the terminal. A metal layer made of copper, for example, is provided on the other surface of the insulating layer. A slit is formed in the metal layer so as to cross a region being opposite to the electronic component and to divide the metal layer.
Abstract:
A flex-rigid printed wiring board is proposed which includes rigid substrates each formed from an insulative base material and a conductor circuit provided on the insulative base material, and a bendably flexible substrate formed from an insulative base material, conductor circuit provided on the insulative base material and a cover lay to cover the conductor circuit, the rigid and flexible substrates being connected to each other. As the insulative base material of the flexible substrate, there is adopted a bendable base material formed by impregnating a glass cloth with a resin and drying it. An conductor circuit is formed on one side of the flexible substrate while a dummy pattern is formed on the other side near a portion thereof where the flexible substrate is to be bent. Thus, the proposed flex-rigid printed wiring board is excellent in connection reliability, permitting to prevent the base material from being easily deformed near the bending portion, conductor circuit from being broken and the flexible substrate from being waved. The similar effect can also be attained with the wiring patterns of the conductor circuit on the flexible substrate being formed wide or curved in the width direction at the bending portion.