Abstract:
The invention relates to an electronic device comprising a circuit board (10), with a set of input contacts (IN/COM), a set of output contacts (OUT/COM) and an electrical circuit (18) connected between the input contacts (IN/COM) and the output contacts (OUT/COM) and a controller. The invention is characterised in that the controller carries out a real-time test of the circuit board by means of a test signal introduced into the electrical circuit, the electrical circuit (18) being designed as a passive source-specific, or individual circuit board network with at least one element with a capacitive action, wherein the capacitive element is a conductor surface (221) forming a capacitor in the assembled state with a corresponding conductor surface (222' '), on the device, connected to the electrical circuit (18) by means of a contact element in the assembled state, such that the capacitive value of the element with a capacitive action in the assembled state is different from the capacitive value thereof in the disassembled state.
Abstract:
A method of manufacturing an electronic component-embedded board is provided which is capable of suppressing warpage without requiring complicated processes at low cost and which offers high productivity and economic efficiency. A worksheet 100 includes insulating layers 21 and 31 on one surface of an approximately rectangular substrate 11, and electronic components 41 and chip-like dummy parts 51 primarily made from the same material as the primary material of the electronic component 41 are embedded into the insulating layer 21. Chip-like dummy parts 51 are disposed in an unmounted portion of the electronic components 41 in, for example, a frame-like arrangement so as to surround the plurality of electronic components (groups) 41.
Abstract:
This invention provides an evaluation board (10) for evaluating one or more aspects of a surface mount technology system. In one aspect, the evaluation board has a substrate with at least one surface (12). A plurality of board pad patterns (14), each including a plurality of board pads (16), is formed on the surface. The different board pad pattern may have different shaped, sized and spaced board pads, allowing the characteristics of a surface mount technology to be tested on some or all of the board pad patterns at the same time and under uniform conditions. In another aspect, the surface may have a plurality of area-filled board pads similarly allowing a surface mount technology to be tested on the various area-filled board pads.
Abstract:
An offset measuring board is formed of a rectangular metal plate which can be positioned to a component mounting position by a positioning device and which has at least in proximity to one corner portion thereof a recognition through hole, as a recognition mark, having a black bottom face within a recessed portion.
Abstract:
A method and apparatus for optimizing the drilling position of a multi-layer printed circuit board prior to drilling. A template (115) having precisely located target holes (A',B',C',D') and fixture reference marks (118, 119) provides initial coordinate reference information for multi-layer printed circuit boards (25) to be inspected by x radiation. Each board (25) is processed by insertion into a holding fixture, examination of four quadrant target areas using x-ray sources (21-24) and detectors (26-29), digitization of the target area images in each quadrant, and computation of the optimum board position in a follow-on drilling apparatus. After optimization, three reference holes are punched along one edge of the board (25) to provide accurate fiducial positioning marks when the board is placed in the drilling apparatus.
Abstract:
A method and apparatus for optimizing the drilling position of a multi-layer printed circuit board prior to drilling. A template (115) having precisely located target holes (A',B',C',D') and fixture reference marks (118, 119) provides initial coordinate reference information for multi-layer printed circuit boards (25) to be inspected by x radiation. Each board (25) is processed by insertion into a holding fixture, examination of four quadrant target areas using x-ray sources (21-24) and detectors (26-29), digitization of the target area images in each quadrant, and computation of the optimum board position in a follow-on drilling apparatus. After optimization, three reference holes are punched along one edge of the board (25) to provide accurate fiducial positioning marks when the board is placed in the drilling apparatus.
Abstract:
Die Erfindung betrifft ein Verfahren (2) zur Herstellung einer Schaltung (4), insbesondere einer Hörhilfe (6), bei dem eine Leiterplatte (10) mit einem ersten Bereich (14) und mit einem zweiten Bereich (12), die mittels einer Grenze (18) getrennt sind, bereitgestellt wird. An der Leiterplatte (10) wird ein Bauteil (24) angebracht, wobei das Bauteil (24) auf der Grenze (18) positioniert wird. Der erste Bereich (14) wird mittels einer eine Kante (42) aufweisenden Maske (38) abgedeckt, wobei die Kante (42) auf dem Bauteil (24) positioniert wird, und die Leiterplatte (10) wird mit einer Beschichtung (46) versehen. Die Beschichtung (46) wird im Bereich des Bauteils (24) aufgetrennt, und die Maske (38) wird entfernt.