Abstract:
The invention relates to a method (2) for manufacturing a circuit (4), in particular of a hearing aid (6), in which method (2) a printed circuit board (10) is made available with a first region (14) and with a second region (12) which are separated by means of a boundary (18). A component (24) is mounted on the printed circuit board (10), wherein the component (24) is positioned on the boundary (18). The first region (14) is covered by means of a mask (38) which has an edge (42), wherein the edge (42) is positioned on the component (24), and the printed circuit board (10) is provided with a coating (46). The coating (46) is cut away in the region of the component (24) and the mask (38) is removed.
Abstract:
For an electronic control module (1), in particular for a transmission controller, comprising a printed circuit board (5) with a component side (17), on which at least one contact area (13a) is arranged, and comprising at least one electrical component (20) with at least one electrical connection element (24) having a connection section (25) which runs parallel to the component side (17) of the printed circuit board (5) and is electrically connected to the at least one contact area (13a), it is proposed to arrange at least one adapter (30) on the printed circuit board (5), which adapter is independent of the at least one electrical component (20), is arranged as a separate part on the printed circuit board (5) and has a holding body (31) fastened to the printed circuit board (5) outside the at least one contact area (13a) and at least one metal web (34) which is arranged on the holding body (31) and has a contact section (35) running parallel to the component side of the printed circuit board, wherein the contact section (35) of the at least one metal web (34) and the connection section (25) of the at least one connection element (24) are arranged lying on top of one another in a covering area (50), as seen in a direction perpendicular to the printed circuit board, and are welded to one another in the covering area (50), and the at least one metal web (34) or the at least one connection element (24) makes electrical contact with the at least one contact area (13a) by means of an electrically conductive material (42) applied to the at least one contact area (13a).
Abstract:
The technique described relates to a support (38) entering into the fabrication of an electronic device, said support comprising at least one component to be protected (21) and at least one three-dimensional element (34, 35, 36) of height at least equal to the height of an electronic component, said three-dimensional element being disposed laterally opposite said at least one component to be protected (21). According to the technique described, said three-dimensional element (34, 35, 36) is chiefly constituted of a permanent assembling material (51).
Abstract:
The present invention provides a component-embedded substrate (1) formed by dividing a laminate which is formed by bonding a component (12) onto a conductive material (10) placed on a support (8); sequentially laminating an insulation material (18, 28) and a core substrate (20) each having a component avoiding hole (32) which avoids the component; and hot-pressing the laminate to allow the melted insulation material to flow into the component avoiding hole to thereby form an integrated laminate (2, 36), wherein the component-embedded substrate includes regulation means (16, 34, 32, 38) which limits the displacement of the core substrate slipping on the insulation material melted during the hot pressing.
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:
A full bridge circuit including four switching elements (Q1 to Q4) is alternated with a high switching frequency and a series-connected resonance circuit (5) including an inductor (L2) and a capacitor (C2) is made to resonate at a switching frequency of the full bridge circuit multiplied by an integer (for example, frequency multiplied by three), thereby generating a high voltage pulse for start up. After a high-pressure discharge lamp (DL) is started up, the full bridge circuit is alternated with a low switching frequency so as to operate as a step-down chopper for inverting the output polarity, thereby stably supplying rectangular wave voltage of low frequency to the high-pressure discharge lamp (DL) via a filter circuit including an inductor (L1) and a capacitor (C1).
Abstract:
A circuit board assembly (10) comprising a laminate substrate (12) and a surface mount device (18) having a CTE less than that of the laminate substrate (12) and attached with at least one solder joint (20) to a first surface (14) of the laminate substrate (12). The assembly (10) further includes a localized stiffener (24,124,224) attached to a second surface (16) of the laminate substrate (12) so as to be directly opposite the circuit device (18). The localized stiffener (24,124,224) is formed of a material and is shaped so that, when attached to the laminate substrate (12), the stiffener (24,124,224) is capable of increasing the thermal cycle fatigue life of the one or more solder joints (20) that attach the device (18) to the substrate (12).