摘要:
A dielectric structure including a metal foil, a dielectric layer and a conductor layer provided in this order, wherein the metal foil has a thickness of from 10 to 40 μm, the dielectric layer has a thickness of from 0.3 to 5 μm, and the conductor layer has a thickness of from 0.3 to 10 μm. The dielectric structure has plural vias which are separated from each other, and which penetrate through both of the dielectric layer and the conductor layer. The vias of the dielectric layer have different diameters which are in a range of from 100 to 300 μm, a diameter of each of the vias of the conductor layer is larger than a diameter of a corresponding via of the dielectric layer by 5 to 50 μm, and a minimum via pitch is from 100 to 350 μm.
摘要:
A plasma etching method includes disposing a first electrode and a second electrode to face each other; preparing a part in the processing chamber; supporting a substrate; vacuum-evacuating the processing chamber; supplying an etching gas into a processing space between the first electrode and the second electrode; generating a plasma of the etching gas in the processing space by applying a radio wave power to the first electrode or the second electrode; and etching a film to be processed on a surface of the substrate by using the plasma. Further, a DC voltage is applied to the part during the etching process, the part being disposed away from the substrate and being etched by reaction with reactant species in the plasma.
摘要:
A via array capacitor including a capacitor body having a first main surface and a second main surface and having a structure in which dielectric layers and inner electrode layers are alternately laminated; a plurality of via conductors which conduct the inner electrode layers to each other and are, as a whole, arranged in array form; and metal-containing layers which are disposed on at least one of the first main surface and the second main surface, wherein a total volume of the inner electrode layers and the metal-containing layers included in the via array capacitor is from 45 vol.% to 95 vol.% of a volume of the via array capacitor.
摘要:
A capacitor is provided having a tough surface portion which prevents cracking that tends to occur when the capacitor is built-in or surface-mounted on a wiring board. A ceramic sintered body of the capacitor includes a capacitor forming layer portion, a cover layer portion and an interlayer portion. The capacitor forming layer portion has a laminated structure wherein ceramic dielectric layers and inner electrodes connected to a peripheral portion of capacitor via conductors, are alternately laminated. The cover layer portion is exposed at a surface portion of the ceramic body and has a laminated structure wherein ceramic dielectric layers and dummy electrodes not connected to the capacitor via conductors, are alternately laminated.
摘要:
A recording/reproducing apparatus includes a cartridge holder which is rotatably provided on a chassis, into which a disc cartridge enclosing a magneto-optical disc is inserted, and which holds the inserted disc cartridge, an optical pickup that irradiates laser light onto the magneto-optical disc, a magnetic head that is provided on the upper surface side of the cartridge holder facing the optical pickup and that is moved between a lowered position close to the optical disc and a raised position away from the magneto-optical disc, at least one first sliding member that is movably provided on the cartridge holder, a head raising/lowering mechanism that moves the magnetic head between the upper position and the lower position by moving the first sliding member, and a driving mechanism that is disposed on a lower surface side of the chassis, engages the sliding member, and moves the first sliding member.
摘要:
A wiring board comprising: a conductor layer comprising Fe and Cu; and at least one of a radiator, a connection terminal, a cover and a circuit component, connected to the conductor layer through a joining member, which is obtained by coating a copper paste comprising a copper powder, an organic vehicle and an Fe2O3 particle as a conductor layer on a ceramic green sheet and firing it.
摘要:
A wiring substrate in which a capacitor is provided, the capacitor comprising a capacitor body including a plurality of dielectric layers and internal electrode layers provided between the different dielectric layers, wherein said capacitor body has, in at least one side face of said capacitor body, recesses extending in a thickness direction of said capacitor body from at least one of a first principal face of said capacitor body and a second principal face positioned on the side opposite to the first principal face.
摘要:
A laminated ceramic capacitor (10) divided into a first laminate (11), a second laminate (12), a third laminate (13), and a fourth laminate (14). The first laminate (11) includes a ceramic layer (15) serving as a dielectric layer. The ceramic layer (15) is thicker than a ceramic layer (17) sandwiched between internal electrodes (16a) in the second laminate (12) or the fourth laminate (14), and thinner than 20 times the thickness of the ceramic layer (17). The third laminate (13) includes dielectric layers, which serve as the ceramic layers (17), and has a thickness of 5% of the total thickness of the second laminate (12) and the fourth laminate (14). Accordingly, the third laminate (13) achieves the function of absorbing an electrode-induced thickness differential. Also, by means of regulating the thickness of the first laminate (11), portions of via electrodes (18) that extend without being electrically connected to the internal electrodes (16b) can be shortened.
摘要:
A business wireless communication system, which includes both a repeater relay station of a wireless network using a repeater system and an FDMA relay station of a wireless network using FDMA system, comprises means for ensuring that the repeater relay station, when receiving a call signal from a repeater wireless terminal of the wireless communication network of the repeater system, is communication-line-connected to the FDMA relay station so as to forward the call signal to the FDMA relay station, which sets the forwarded call signal to a control signal and transmits it to an FDMA wireless terminal of the wireless communication network of the FDMA system; and means for ensuring that the FDMA wireless terminal receives the control signal to communicate with the repeater wireless terminal via the repeater relay station. In this way, there can be provided a wireless communication method, a system using the same, and a wireless terminal thereof, wherein a single reception frequency is used to attend to call signals of two different wireless communication systems.
摘要:
A wiring board includes a substrate core, ceramic capacitors and a built-up layer. The substrate core has a housing opening portion therein which opens at a core main surface. The ceramic capacitors are accommodated in the housing opening portion and oriented such that the core main surface and a capacitor main surface of each capacitor face the same way. The built-up layer includes semiconductor integrated circuit element mounting areas at various locations on a surface thereof. In the substrate core, each ceramic capacitor is respectively disposed in an area corresponding to each semiconductor integrated circuit element mounting area.