摘要:
The method of producing a substrate comprises the steps of: forming a through-hole in a base member; plating the base member so as to coat an inner face of the through-hole with a plated layer; applying photo resist on the base member; optically exposing and developing the photo resist so as to form a resist pattern, which coats at least a planar area of the through-hole; and etching an electrically conductive layer formed on the surface of the base member. The resist pattern is formed so as to separate an area of exposing the conductive layer a prescribed distance away from an edge of the through-hole, and the prescribed length is longer than a distance of etching a side face of the conductive layer in the etching step.
摘要:
A circuit board has a low thermal expansion coefficient that suits the thermal expansion coefficient of an element to be mounted thereupon and can prevent the occurrence of delamination and cracking of a core layer when the circuit board is used in a low temperature environment. The circuit board is constructed by laminating a core layer and at least one wiring layer, where the at least one wiring layer has slightly smaller external dimensions in a planar direction than the core layer.
摘要:
A timepiece includes pointers, motors for driving the pointers, a pointer position detector for detecting the positions of the pointers, a control unit, an electricity storage unit as a power supply, and a voltage detector for detecting the power supply voltage. The control unit controls the pointer position detection by means of the pointer position detector on the basis of the power supply voltage detected by the voltage detector. Therefore, the pointer position detector can be halted when the power supply voltage decreases to less than a specific voltage, and the pointer position detector can be driven while the power supply voltage is low.
摘要:
A mobile terminal device with a camera is provided which can secure emitted light brightness of a camera light unit and save power consumption of the device. During photographing, when the driving power of the camera light unit is increased, driving power for an illumination unit is decreased so that the increase of the total power consumption of the camera light unit and illumination unit can be minimized. In addition, the camera lamp unit and illumination unit are driven by respective driving circuits that share a power supply unit.
摘要:
In conventional semiconductor devices, customarily, it is sought to position the mounting region of a semiconductor element in the center of a package, and hence the dimensions of the package are increased unnecessarily, but the object of the present invention is to avoid unnecessary increasing of the package dimensions, without impairing the required functions of the semiconductor device. Unnecessary increasing of package dimensions is avoided by providing a semiconductor device comprising a package having a semiconductor element mounting region, a first region containing the aforementioned mounting region, and a second region partially adjoining the periphery of the above-described first region.
摘要:
A thin multi-layer circuit board having alternately stacked wiring pattern layers, including a top wiring pattern layer and insulating layers on an insulating plate-like substrate. The wiring pattern layers are electronically connected through vias in the insulating layers to form a predetermined circuit pattern by said wiring pattern layers. A metallic barrier layer is formed on the top wiring pattern layer, except at an exclusion zone of the metallic barrier layer. An electronic part-mounting pad layer and a remodeling pad layer are formed on the metallic barrier layer. The remodeling pad layer is arranged adjacent the electronic part-mounting pad layer, with the exclusion zone therebetween.
摘要:
A power storage apparatus includes a power storage module having a plurality of power storage elements which are aligned in one direction; a device placed adjacently to the power storage module in the direction of the alignment of the power storage elements; a high-voltage cable used in charge and discharge of the power storage module; and a support structure configured to support the high-voltage cable at a plurality of points to position the high-voltage cable along a reference path. The high-voltage cable is configured to electrically connect an electrode terminal of the power storage module to the device. The electrode terminal is one of two electrode terminals of the power storage module and is located on a farther side of the power storage module from the device.
摘要:
To provide a resin composition that contains a solvent-soluble polyimide and can provide a film exhibiting high viscoelasticity and flexibility at high temperatures. To attain this, a polyimide resin composition is provided that includes a polyimide having a polycondensation unit of a tetracarboxylic acid dianhydride and a diamine, wherein the tetracarboxylic acid dianhydride includes an (α1) tetracarboxylic acid dianhydride represented by general formula (1), or the diamine includes an (β1) aromatic diamine represented by general formula (2), the diamine includes an (β2) aliphatic diamine represented by general formula (3) or (4), a total amour of the (α1) tetracarboxylic acid dianhydride and the (β1) aromatic diamine is 5 to 49 mol % with respect to a total amount of the tetracarboxylic acid dianhydride and the diamine, and an amine equivalent of the polyimide is 4,000 to 20,000.