Abstract:
A structure for attachment of a shield case to a circuit board. Electronic components are mounted at one face of the circuit board. The shield case is for covering the electronic components and blocking electromagnetic waves. The attachment structure includes toe portions, formed to protrude from the shield case, and holes formed in the circuit board, at which the toe portions can be inserted. The toe portions are fixed to the circuit board by being inserted into the holes and soldered to soldering lands at the other face of the circuit board. Thus, it is possible to prevent solder balls and solder flux entering the shield case, it is further possible to reserve space for soldering lands, with sizes that are required for fixing of the shield case, at a rear face of the circuit board, and it is possible to attach the shield case to the circuit board strongly.
Abstract:
A structure for attachment of a shield case to a circuit board. Electronic components are mounted at one face of the circuit board. The shield case is for covering the electronic components and blocking electromagnetic waves. The attachment structure includes toe portions, formed to protrude from the shield case, and holes formed in the circuit board, at which the toe portions can be inserted. The toe portions are fixed to the circuit board by being inserted into the holes and soldered to soldering lands at the other face of the circuit board. Thus, it is possible to prevent solder balls and solder flux entering the shield case, it is further possible to reserve space for soldering lands, with sizes that are required for fixing of the shield case, at a rear face of the circuit board, and it is possible to attach the shield case to the circuit board strongly.
Abstract:
Convertisseur de puissance de courant continue en courant alternatif, ledit convertisseur comprenant une carte électronique de puissance réalisée sur un substrat métallique isolé (11) comprenant : - un support métallique (43) formant face arrière dudit substrat métallique isolé (11), et - une couche d'isolant (42) recouvrant le support métallique, formant face avant dudit substrat métallique isolé (11), le convertisseur comprenant en outre au moins un composant (30) monté sur la face arrière du substrat métallique isolé (11), ledit composant (30) comprenant au moins une fiche (32) qui traverse le substrat métallique isolé (11) par l'intermédiaire d'un trou débouchant (46) dans ledit substrat métallique isolé (11), et ledit composant (30) étant soudé à au moins une piste de liaison électrique (41) au moyen d'une pièce intermédiaire (70) placée en face avant dudit substrat métallique isolé (11) et permettant de faire l'interface entre ladite au moins une piste de liaison électrique et la fiche du composant (30).
Abstract:
A composite heat sink device (1) includes a heat sink body (2, 3) formed of aluminum, the body (2, 3) having a pair of coplanar surfaces (4), and a thermally conductive solderable element (5), for example of copper, mechanically fixed to each of the coplanar surfaces (4). Each of the solderable elements has a first surface which is contiguous with one of the coplanar surfaces, and a second surface which is soldered to a printed circuit board.
Abstract:
The invention relates to an electrical connection, especially a through contact, between at least two conductive layers, especially conductive tracks or the like on printed circuit boards, preferably multilayer printed circuit boards, with said connection formed by an electrically conductive track running transversely to the layers and contacting them. The connecting track is formed by a separately manufactured conductive connection section (6) subsequently applied to the printed circuit board (1) and is soldered to the layers (2).
Abstract:
The present invention relates to a printed circuit board arrangement (400) and a method for forming an electrical connection at a printed circuit board. The printed circuit board arrangement comprises a printed circuit board (410) having a first side (411), a second side (412) and an electrical connection (413) electrically connecting a first conductive layer and a second conductive layer (417) of the printed circuit board. The electrical connection (413) comprises a passage (416) extending from an opening in one of the sides of the printed circuit board through the printed circuit board between the first and second layers. Electrically conducting material (414) is formed on the walls (415) of the passage. The electrically conducting material forms a first path electrically connecting the first conductive layer (417) with the second conductive layer (417). At least one first ball 420 is enclosed by the passage. The at least one firstball is electrically conducting and has a diameter which is equal to or smaller than the length and diameter of the passage, wherein the at least one first ball (420) form part of a second electrical path between the first and second conductive layers of the printed circuit board, said second electrical path having a lower resistance than the first path.