摘要:
A multilayer circuit board provided with multilayer wiring patterns as upper and lower multilayers is provided, in which on a first circuit board 24 with a first wiring pattern 23 formed thereon a copper foil 27 is bonded through an insulating resin layer 25, the patterning is carried out so as to form a second wiring pattern 33, and the upper and lower patterns 23 and 33 are connected to each other by conductive substance 34 filled within an opening portion 32 of the second wiring pattern 33. In accordance with this multilayer circuit board, the quality thereof is improved, the manufacturing thereof is carried out at low cost, and in addition, it becomes possible to form a circuit of high density integration.
摘要:
A novel conductive paste and a method of making the same in which metallic gallium is combined with a metal or alloy which forms a eutectic with gallium in an amount in excess of its limit of solubility in gallium at a specific temperature. This melt is then treated with a metal powder of a second metal or alloy which alloys with gallium to produce a higher melting alloy, the second metal powder being coated on its surface with the eutectic-forming metal.
摘要:
A novel conductive paste is disclosed which is suitable for use to connect circuit patterns of a printed circuit board.The conductive paste comprises a melt of gallium and a metal element which forms an eutectic mixture with gallium, and metal powder which alloys with gallium uniformly dispersed in the melt. The content of the metal element and the metal powder are selected to control a solid content in the paste at a predetermined working temperature.
摘要:
A circuit board comprises a rigid metal substrate, a conductive metal layer formed into a predetermined circuit pattern, and a resinous layer interposed between the metal substrate and the metal layer for electrically insulating and bonding the metal substrate and the metal layer, the conductive metal layer having an elongation at break of not less than 15%, and the resinous layer comprising a first resinous layer having a volume resistivity of not less than 10.sup.10 .OMEGA.. cm, and a second resinous layer having an elongation at break of not less than 100%. The circuit board has a desired dielectric strength between the metal substrate and the conductive metal layer and can be bent without resulting disconnection in the metal layer or the like.
摘要:
A cooling device is disclosed. The cooling device includes a thermal diffusing unit operable to radiate heat taken from a heating element, and a heat transporting part, laminated in a thickness direction of the heat diffusing unit and diffused thereby. The thermal diffusing unit has an upper plate, a lower plate opposite thereto, a vapor diffusion path to diffuse an evaporated refrigerant, and a capillary channel to circulate a condensed refrigerant. The heat transporting part has an upper plate, a lower plate opposite thereto, a vapor diffusion path to diffuse an evaporated refrigerant, and a capillary channel to circulate a condensed refrigerant. Either the upper plate or the lower plate is formed with the same member of the lower plate or the upper plate of the heat transporting part.
摘要:
A circuit element is arranged on an organic substrate and connected to a wiring pattern arranged on the organic substrate. An internal connection electrode is formed on a conductive support body by electroforming so as to obtain a unitary block of the internal connection electrode and the support body. Each end of each of the internal connection electrodes connected into a unitary block by the support body is connected to the wiring pattern. After the circuit element is sealed by resin, the support body is peeled off, so as to obtain individual internal connection electrodes separately and the other end of each of the internal connection electrodes is used as an external connection electrode on the front surface while the external connection electrode on the rear surface is connected to the wiring pattern.
摘要:
A heat transporting unit comprises an upper plate, a lower plate opposing the upper plate, an internal space formed by the upper plate and the lower plate and operable to enter a refrigerant, a plurality of paths dividing the internal space in a first direction, and a plurality of grooves being provided at a bottom surface of the internal space. The plurality of the paths and the plurality of the grooves are connected by capillary channels in a region, and are divided by sidewalls in another region.
摘要:
[Problems] An object of the present invention is to perform switching of audio and subtitle and so on automatically or by simple operation when a recording medium such as a DVD, on which a plurality of streams of audio and subtitle are recorded, is reproduced.[Means for Solving Problems] A playback pattern based on combination of streams of video, audio, and subtitle which was reproduced in the past is stored in a flash memory 12. Then, a microcontroller 10 makes an audio/video/subtitle processing section 7 reproduce a playback pattern based on combination of the streams different from the playback pattern stored in the flash memory 12.
摘要:
A method of manufacturing a lead frame comprises the steps of preparing a three-layered material comprising a metal base, an etching stopper layer made of a metal material different from that of the metal layer formed on a first surface of the metal base and a chromium layer formed on the etching stopper layer, forming a resist layer having a negative pattern relative to an inner lead to be formed on the chromium layer of the three-layered material, forming an inner lead by plating copper by using the resist layer as a mask, forming an outer lead on the metal base, removing a back of a region in which an inner lead of the metal base is formed by etching, removing the etching stopper layer, and removing the chromium layer.
摘要:
A circuit element is arranged on an organic substrate and connected to a wiring pattern arranged on the organic substrate. An internal connection electrode is formed on a conductive support body by electroforming so as to obtain a unitary block of the internal connection electrode and the support body. Each end of each of the internal connection electrodes connected into a unitary block by the support body is connected to the wiring pattern. After the circuit element is sealed by resin, the support body is peeled off, so as to obtain individual internal connection electrodes separately and the other end of each of the internal connection electrodes is used as an external connection electrode on the front surface while the external connection electrode on the rear surface is connected to the wiring pattern.