摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
An electronic device (100) includes a printed circuit board (31) and an electronic element (50) having a terminal (52). The terminal (52) has a surface section (60) and an insertion section (59). The printed circuit board (31) includes a through hole (33) extending from a first surface to a second surface of the printed circuit board (31), a surface land (34) disposed on the first surface, and an insertion land (35) integrally disposed on a sidewall of the through hole (33) and on a periphery around the through hole (33). The surface section (60) is coupled with the surface land (34) through a solder (72). The insertion section (59) is disposed in the through hole (33) and is coupled with the insertion land (35) through the solder (72). The surface section (60) has a recess part (62) and a portion of recess part (62) is disposed so as to be axially aligned with a portion of the through hole (33).
摘要:
An electronic device (100) includes a printed circuit board (31) and an electronic element (50) having a terminal (52). The terminal (52) has a surface section (60) and an insertion section (59). The printed circuit board (31) includes a through hole (33) extending from a first surface to a second surface of the printed circuit board (31), a surface land (34) disposed on the first surface, and an insertion land (35) integrally disposed on a sidewall of the through hole (33) and on a periphery around the through hole (33). The surface section (60) is coupled with the surface land (34) through a solder (72). The insertion section (59) is disposed in the through hole (33) and is coupled with the insertion land (35) through the solder (72). The surface section (60) has a recess part (62) and a portion of recess part (62) is disposed so as to be axially aligned with a portion of the through hole (33).
摘要:
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.
摘要:
Es wird ein Einpresskontaktstift (2) zur Anordnung in einer ersten Durchkontaktierung einer Leiterplatte vorgeschlagen. Ein distaler Einpressabschnitt (4) weist zur Einpressung in die erste Durchkontaktierung eine erste Querausdehnung (D1) auf. Ein proximaler Einpressabschnitt (8) weist zur Einpressung in eine zweite Durchkontaktierung eine zweite Querausdehnung (D2) auf, welche größer ist als die erste Querausdehnung (D1).