摘要:
A key switch includes a switch provided on a base, a key top for operating the switch, and a link mechanism supported on the base and supporting the key top on its upper side, a shape of the link mechanism being changed when the key top is depressed. A movable plate is provided on the base, in stacked relationship; such that the movable plate is moved when the key top is depressed so as to change the shape of the link mechanism to a flat shape. An auxiliary link mechanism has a first part supported on the moveable plate and, in turn, by the base and a second part supporting the key top.
摘要:
A plurality of multi-chip modules are incorporated in a semiconductor device. Each of the multi-chip modules has a plurality of functional parts mounted on a circuit board. A flexible wiring board connects the multi-chip modules to each other. An interface part is mounted on the flexible wiring board so as to control input and output signals of the multi-chip modules.
摘要:
A multilayer thin-film wiring board including a base material provided with a plurality of wiring layers and an insulating layer laminated on the base material, and including a via formed by laminating the wiring layers so as to be provide through the insulating layer. A plurality of branching vias are provided by forming a plurality of branches in one of the wiring layers forming the via, the plurality of branching vias being placed along a direction of extension of the base material. The plurality of branching vias are joined to the one of the plurality of wiring layers which is placed at a position closest to the base material.
摘要:
The thin-film multi-layer substrate includes an insulating substrate base plate, and a thin-film structure including a plurality of conducting layers and a plurality of insulating layers formed on the substrate base plate. A via structure is formed in the thin-film structure and connected to one of the conducting layers of the thin-layer structure. Pins are connected to the via structure, such that the bottom of the via structure is directly laminated on the substrate base plate, and the pins are secured onto the via structure.
摘要:
In a circuit arrangement for a multilayer printed circuit board, a first circuit layer is formed on a substrate, and comprises a dielectric layer having a circuit pattern formed thereon. A second circuit layer is further formed on the first circuit layer, and comprises a dielectric layer having a circuit pattern formed thereon. The first circuit pattern includes conductive segments having only an X-directional component, and the second circuit pattern includes conductive segments having only an Y-directional component perpendicular to the X-directional component. Electric connections between the X-directional segments and the Y-directional segments are suitably established by vias provided in the second layer. The first circuit pattern further includes slant conductive segments having both the X- and Y-directional components and arranged in a blank zone not occupied by the X-directional segments, and the second circuit pattern further includes slant conductive segments having both the X- and Y-directional components and arranged in a blank zone not occupied by the Y-directional segments. Electric connections between the slant segments of the first pattern and the slant segments of the second pattern are suitably established by vias provided in the second layer.
摘要:
A design apparatus for an electronic device is provided. The apparatus includes: a selection unit that selects a first component which meets a characteristic condition, from a component database which includes a characteristic and a recommended level of each of components, the recommended level being variable; a first determination unit that acquires a recommended level of the first component from the component database, and determines the acquired recommended level; a creation unit that creates design data of the electronic device including the first component; and a second determination unit that acquires, after the creation, a recommended level of the first component from the component database, and determines the acquired recommended level after the creation.
摘要:
A connection member is disposed between a semiconductor package and a printed wiring board. The connection member includes: a base member formed of an insulating material; a plurality of through-holes provided in the base member at corresponding positions between a plurality of first terminal pads of the semiconductor package and a plurality of second terminal pads of the printed wiring board; and an electronic component inserted in the plurality of through-holes, the electronic component having a first electrode and a second electrode at ends thereof, the first electrode connected to one of the first terminal pads, the second electrode connected to one of the second terminal pads.
摘要:
A mobile terminal device having communicating functions includes a housing; an antenna housed in the housing to be freely pulled out; a pull-out mechanism that pulls out the antenna from within the housing in accordance with an instruction to pull out the antenna; and an instructing section that gives the instruction to pull-out the antenna to the pull-out mechanism in accordance with a predetermined event for any one of the communicating functions.
摘要:
The present invention provides a low-cost electrolytic capacitor wherein the deformation of the casing due to the thermal expansion during reflowing is prevented. An electrolytic capacitor of a surface mounting type having a capacitor element that consists of a dielectric film and an electrode foil, a metal casing that holds the capacitor element, and an electrolyte solution in which the capacitor element held in the casing is immersed, wherein the casing is equipped with a gas absorbing member that absorbs the gas generated in the casing.
摘要:
A mounted circuit substrate has at least one conductive layer. The side faces of a component mounting pad is formed on a surface of the substrate, and includes at least a columnar pattern made of a metal highly resistant to erosion by solder The side faces of the component mounting pad are completely covered with an organic insulating layer. Therefore, the component mounting pad can withstand molten solder stresses accompanying component replacement even when component replacement is done many times.