Abstract:
L'invention concerne un procédé de fabrication d'un module électronique (2) comportant une carte (3) ô circuit imprimé (4), au moins un composant d'un premier type (5) et un composant d'un deuxième type (6), le procédé comprenant les étapes de : - disposer de la brasure sur la carte, - positionner le composant du premier type, - fondre la brasure pour souder le composant du premier type, - positionner le composant du deuxième type de telle manière que celui-ci s'étende au-dessus du composant du premier type et ait des pattes (7) en appui sur la carte par de la brasure, - fondre la brasure pour souder le composant du deuxième type.
Abstract:
This invention concerns a device for mounting electrical and electronic components (17) on printed circuit boards or hybrids (7) with different thermal expansion characteristics. The component (17), for instance, out of high-alumina ceramics, has several connecting pins (11) as connecting and mounting elements. These pins are butt-soldered with a conductor path (5) of the component (17). Each connecting pin (11) has a number of recesses (15) in its upper part. The form and arrangement of these recesses (15) effects a certain freedom of movement in all directions for the upper end of the connecting pin (11). This permits compensation for differences in the thermal expansion between component (17) and circuit board (7) and deviations from standard dimensions of both parts resulting from the production. Thus, the connecting pins (11) can be directly soldered into plated throughholes (10) in the circuit board (17).
Abstract:
L'invention concerne une entretoise à braser comportant un corps allongé (102) ayant une extrémité pourvue d'un taraudage (104) et une extrémité opposée pourvue d'une surface transversale d'appui (106) en saillie de laquelle s'étend un pion lisse de centrage (103), le pion (103) comportant un passage extérieur longitudinal (108) s'étendant sur au moins une partie de sa longueur jusqu'à la surface transversale d'appui (106) permettant une remontée par capillarité d'une pâte à braser en fusion jusqu'à la surface transversale d'appui (106). L'invention concerne également un module (112) comportant une telle entretoise.
Abstract:
The invention relates to a method for producing an electronic module (2) comprising a printed circuit (4) board (3), at least one first type of component (5), and a second type of component (6), said method comprising the following steps: solder (8) is placed on the board; the first type of component is placed in position; the board is generally heated in order to melt the solder in such a way as to solder the first type of component; the second type of component is positioned in such a way that it has tongues (7) which are supported on the board by means of solder; and the solder is locally heated such that it melts in order to solder the second type of component. The invention also relates to a production line for implementing said method.
Abstract:
L'invention concerne un procédé de fabrication d'un module électronique (2) comportant une carte (3) à circuit imprimé (4), au moins un composant d'un premier type (5) et un composant d'un deuxième type (6), le procédé comprenant les étapes de : - disposer de la brasure (8) sur la carte, - positionner le composant du premier type, - chauffer globalement la carte pour fondre la brasure de manière à souder le composant du premier type, - positionner le composant du deuxième type de telle manière que celui-ci ait des pattes (7) en appui sur la carte par de la brasure, - chauffer localement la brasure pour fondre la brasure de manière à souder le composant du deuxième type. L'invention a également pour objet une ligne de production pour la mise en oeuvre de ce procédé.
Abstract:
The present invention relates to surface mount assembly of electronic equipment. More especially it relates to mounting of high frequency electronic components for efficient cooling also with low cost circuit boards. Particularly it relates to efficiently transporting heat and eliminating air gaps in microwave equipment.
Abstract:
The present invention relates to surface mount assembly of electronic equipment. More especially it relates to mounting of high frequency electronic components for efficient cooling also with low cost circuit boards. Particularly it relates to efficiently transporting heat and eliminating air gaps in microwave equipment.
Abstract:
The first external electrode has a main body portion a part of which is buried in a side wall of a case and joining portions protruding from an end of the main body portion toward the inside of the case. Each joining portion of the first external electrode is formed to have a thickness smaller than that of the main body portion, and an end portion of each joining portion is directly joined onto a wiring pattern of the insulating substrate through ultrasonic joining. Therefore, a load and ultrasonic vibration necessary for joining the joining portion onto the wiring pattern can be suppressed, which makes it possible to directly join the first external electrode onto the wiring pattern of the insulating substrate without damaging an insulating member of the insulating substrate.
Abstract:
The invention concerns a device for mounting electrical and electronic components (3) on printed-circuit boards or hybrids (1) with low thermal expansion, such as thermally stressed high-frequency power transformers on printed-circuit boards (1) made of aluminium oxide-ceramics. The component (3) comprises through-holes (6) which pass through a contact plate (7). Disposed in each of the holes (6) is a metal pin (8) whose upper part is pressed into the contact plate (7) so that the metal pin thus forms a force-locking electrically conductive cold weld therewith. At its other end, the metal pin (8) is soldered flush, for example, to a printed conductor (2). The transverse dimension of the metal pin (8) is smaller than the diameter of the hole (6), such that the metal pin (8) has a given amount of freedom of movement. In this way, differences between the thermal expansion of the component (3) and the printed-circuit board (1) can be compensated.
Abstract:
A printed circuit board terminal includes a rectangular metal wire rod having a substantially rectangle cross-section. One longitudinal end portion of the printed circuit board terminal includes an insertion portion that is configured to be inserted into a through hole provided in a printed circuit board and soldered. A conducting metal plated layer is provided on an entire surface of the rectangular metal wire rod. One marginal portion of the insertion portion, which faces a long side direction of the rectangle cross-section, is removed to reduce a dimension in the long side direction corresponding to a width direction.