摘要:
A method, and an assembly comprising a printed circuit board (1) and at least one component (4), a connection leg (3) of the component being wave-soldered to the printed circuit board (1), while any excess solder between adjacent connection legs (3) and between a connection leg (3) and the printed circuit board (1) is prevented in that the connection leg (3) lies against the printed circuit board (1) or in that the connection leg (3) comprises an end portion (7) connected to the printed circuit board (1) and an intermediate portion (8) situated between the end portion (7) and the envelope (5), while at least a side of the intermediate portion (8) remote from the printed circuit board (1) is solder-repellent.
摘要:
An electrical connector (1) (see Fig. 1) which is to be surface-mounted to a printed circuit board (6) has terminals (11) with inverted "T"-shaped soldering portions (12) to be electrically connected to conductors on the printed circuit board (6) each by soldering its soldering portion (12) to a conductor. The soldering portion comprises a flat foot (17) and a leg (18) which is integrally connected to and rising from the midportion of said foot (17). The relatively large foot (17) has an effect of causing substantial reduction of load per unit soldering area upon application of an undesired force to the terminal (11) and of increasing the strength of the soldering joint against removal from the conductor of the printed circuit board (6).
摘要:
An electrical connector (1) (see Fig. 1) which is to be surface-mounted to a printed circuit board (6) has terminals (11) with inverted "T"-shaped soldering portions (12) to be electrically connected to conductors on the printed circuit board (6) each by soldering its soldering portion (12) to a conductor. The soldering portion comprises a flat foot (17) and a leg (18) which is integrally connected to and rising from the midportion of said foot (17). The relatively large foot (17) has an effect of causing substantial reduction of load per unit soldering area upon application of an undesired force to the terminal (11) and of increasing the strength of the soldering joint against removal from the conductor of the printed circuit board (6).
摘要:
A surface-mount power resistor may be fabricated using a power resistor of conventional design as its core. A conventional resistor is reworked so as to flatten its leads from a point near their emergence from the generally tubular body of the resistor to the ends of the leads. The reworked resistor is then encapsulated from a point on the flattened portion of one lead to a corresponding point on the other lead, with the resulting mold being shaped as to have at least two opposing flat surfaces. The ribbon-shaped portions of the leads which exit from the molded body are then shaped as desired to afford the finished product. Similar surface-mount electrical components may be fabricated for any component with axial leads.
摘要:
A lead frame that is suited for use on array types of integrated circuit packages to provide a high degree of compliance for absorbing mechanical stress induced by thermal changes includes a series of individual terminal elements that are connected in a strip form by means of break tabs disposed between adjacent elements. Each terminal element provides two spaced, generally parallel mounting surfaces that are resiliently connected to one another by means of an integral intermediate section. While the terminal elements are interconnected in strip form, one of the mounting surfaces of each element can be bonded to an associated attachment region on the semiconductor substrate. After all of the terminals of the strip have been so bonded, the break tabs between adjacent terminals can be removed to thereby separate the terminals from one another. The package which then results contains discrete compliant terminals which are suitable for subsequent surface attachment to the printed circuit board.
摘要:
A lead frame that is suited for use on array types of integrated circuit packages to provide a high degree of compliance for absorbing mechanical stress induced by thermal changes includes a series of individual terminal elements that are connected in a strip form by means of break tabs disposed between adjacent elements. Each terminal element provides two spaced, generally parallel mounting surfaces that are resiliently connected to one another by means of an integral intermediate section. While the terminal elements are interconnected in strip form, one of the mounting surfaces of each element can be bonded to an associated attachment region on the semiconductor substrate. After all of the terminals of the strip have been so bonded, the break tabs between adjacent terminals can be removed to thereby separate the terminals from one another. The package which then results contains discrete compliant terminals which are suitable for subsequent surface attachment to the printed circuit board.
摘要:
The present disclosure is concerned with a special electric component such as a motor, an accumulator, or an electric subassembly having at least one soldering pin, in particular at least two soldering pins, for solder joining the special electric component to a printed circuit board, wherein the at least one soldering pin has a connection end that comprises a front section at the free end of the soldering pin and a first section adjacent the front section, where the front section has a width that is smaller than the width of the first section, in particular wherein the width of the front section is at least 25% smaller than the width of the first section, in particular at least 50% smaller. The present disclosure is also concerned with a printed circuit board assembly and an electric device.