Abstract:
A signal repeating device so constructed that short stubs (13, 14) for electrically connecting signal through holes (3, 8) with ground through holes (5, 10) are provided, thereby giving the effect of restricting signal reflection despite an increased signal transmission speed.
Abstract:
A printed circuit board material (10) composed of plastics and ceramics and comprising a plate-form composite material (11) and a conductive metal wire (12) disposed on the material at a preset pitch, wherein one surface and the other surface of the board material (10) are electrically conducted via the metal wire (12). A method of manufacturing the printed circuit board material comprising the steps of stretching a conductive metal wire at a preset pitch in a mold, pouring a composite material consisting of plastics and ceramics into the mold, hardening the composite material and slicing the hardened material so as to cross the stretched metal wire. The board material can ensure a good electric conduction and prevent the separation of the board material from a conductive layer and the separation of an insulating material from a metal wire, thereby providing a higher-density and higher-dimensional-accuracy printed circuit board.
Abstract:
Substrate (7; 7'; 10) and devices including such a substrate, the substrate having a first surface and a second surface extending substantially in parallel to the first surface, the substrate being of a material of a first conductivity and provided with a plurality of electrically conducting channels (21) which are extending exclusively in a direction perpendicular to the first and second surfaces, said channels having a second conductivity substantially larger than the first conductivity, the substrate being provided with at least one electrode (42) on either one of the first and second surfaces, contacting at least one of said channels, the at least one electrode (42) having a predetermined minimum dimension (D) in a contact area (A) with the substrate, and mutual distances between adjacent ones of the plurality of channels (21) being smaller than said minimum dimension of said at least one electrode (42).
Abstract:
What is described is an electronic device (1) comprising a power component (3) and a printed circuit board (2) . The power component comprises a main body (30) and a lead (31) . The printed circuit board comprises at least two conductive layers (21) parallel to a plane xy, a mounting element (23) and a conductor (24) . The mounting element and the conductor respectively comprise first (23b) and second (24b) conductive tubes, which elongate through a thickness of the printed circuit board along a direction z substantially perpendicular to the plane xy. The main body of the power component is fixed to the mounting element, while the lead thereof is fixed to the conductor.
Abstract:
A substrate (1) for a portable data carrier (10) comprises an electrical component (2, 3), such as an antenna, which has two parts applied on mutually opposite surfaces of the substrate (1). The parts of the electrical component (2, 3) comprise an electrically conductive material and are electrically conductively connected to one another in through-plating regions (4, 5, 6, 7) of the substrate (1) through perforations (8, 13) of the substrate (1). The perforations (8, 13) are produced by means of a laser and have a maximum width of a maximum of 20 μm. A through-plating region (4, 5, 6, 7) preferably has a multiplicity of perforations (8, 13) distributed over the through-plating region (4, 5, 6, 7).
Abstract:
An electronic device comprises a housing having an outer face and an inner face. A key is provided on the housing, which comprises a micro hole formed in the housing and a conductive material extending within the micro hole to the outer face of the housing. A sensor is coupled to the conductive material to detect whether an object is brought into contact or out of contact with the micro hole at the outer face.
Abstract:
A filter unit and a corresponding printed circuit board. The filter unit and the printed circuit board have been equipped with modified end portions being matched such that a number of filter units can be used on the printed circuit board without changing the printed circuit board.