Disclosed herein are implementations of methods and devices for stacking printed circuit board (PCB) assemblies (PCBA) with a single reflow process which decreases impact on surface mount technology (SMT) component and solder joint reliability. A method includes transferring solder paste on to a bottom PCB and forming a bottom PCBA by placing SMT components on the bottom PCB. A middle PCB is stacked on the bottom PCBA and solder paste is transferred on to the middle PCB. A top PCB is stacked on the middle PCB and solder paste is transferred on to the top PCB. SMT components are placed on the top PCB to form a stacked assembly. The stacked assembly is reflowed in a single reflow so that all solder paste simultaneously or nearly simultaneously melts to bond SMT components to respective PCB boards and to bond respective PCBs to each other.

Methods for mounting a power amplifier (PA) assembly having an extended heat slug (11) are disclosed. According to one aspect, a method includes manufacturing a left side PCB (22a) and a right side PCB (22b). The method further includes sliding the left side PCB and the right side PCB inward (30) to encompass the PA assembly so that one of the left and right side PCB is in a position to contact a drain of the PA (13) and so that the other of the left and right side PCB is in a position to contact a gate of the PA (14).

An electronic device includes a circuit board and an electronic element. The circuit board includes a plate body and multiple through holes extending through the plate body. Each of the through holes has a first diameter. The electronic element includes multiple pins, each of which is inserted into a respective one of the through holes, is secured to the circuit board by a soldering process, and has a second diameter smaller than the first diameter of the respective one of the through holes. For each of the pins, a difference between the second diameter of the pin and the first diameter of the respective one of the through holes ranges from 0.4 mm to 0.6 mm. A method for manufacturing the electronic device is also provided.

Apparatus including an elongated body to couple with a surface mount connector to reduce or prevent deformation of the surface mount connector during soldering of the surface mount connector to a substrate, the surface mount connector including a connector housing having a first end portion and a second end portion. In one implementation, the elongated body may include: a first body end portion forming a first tab insertable into a first portion of a socket defined by the first housing end portion; and a second body end portion forming a second tab insertable into a second portion of the socket defined by the second housing end portion.

Apparatus including an elongated body to couple with a surface mount connector to reduce or prevent deformation of the surface mount connector during soldering of the surface mount connector to a substrate, the surface mount connector including a connector housing having a first end portion and a second end portion. In one implementation, the elongated body may include: a first body end portion forming a first tab insertable into a first portion of a socket defined by the first housing end portion; and a second body end portion forming a second tab insertable into a second portion of the socket defined by the second housing end portion.

A connector includes mounting tabs that are extended relative to traditional mounting tabs. On a back side of the printed circuit board (PCB), the mounting tabs connect to a back plate. The mounting tabs extend through the PCB and connect with the back plate, which provides improved structural integrity. Depending on the connector, the use of the mounting tabs can use existing mounting holes for the connector and remove the need for additional mounting holes.

An apparatus for holding a printed circuit board when mounting components thereon, said apparatus comprising a base plate, a mounting device for mounting a printed circuit board spaced from and substantially parallel to the base plate, a plurality of elongate support pins extending through respective holes within the base plate to extend transversely from the base plate, the support pins being independently positionable in height with respect to the base plate to define a configurable support surface for supporting components mounted on the printed circuit board during soldering, wherein the height that each pin extends from the base plate can be adjusted such that the support surface defined by the support pins can correspond to the topography of the circuit board and the components mounted thereon, a locking mechanism being provided for selectively locking the position of each support pin with respect to the base plate, wherein said locking mechanism comprises at least one elongate flexible member arranged to extend around a plurality of said support pins in convolute manner, tensioning device being associated with said at least one flexible member, whereby said tensioning device is adapted to selectively apply tension to said at least one flexible member to grip the pins around which said flexible member extends to lock the position of said pins with respect to the base plate.

This application provides an optical module, and relates to the field of optical communication. An optical module provided in the embodiments of this application includes a laser box and a silicon photonic chip that are enclosed and packaged by an upper enclosure part and a lower enclosure part. The laser box is disposed on and is in contact with the surface of the silicon photonic chip by the side wall or the base. The laser chip is disposed on the top plane of the laser box. The top plane is in contact with the upper enclosure part for heat dissipation, so as to help heat generated by the laser chip be conducted to the upper enclosure part via the top plane, so that the heat generated by the laser chip is dissipated not via the silicon photonic chip.

Method for providing an electrical connection, comprising connecting a first cable to a first conducting structure on a printed circuit board, connecting a second cable to a second conducting structure on the printed circuit board, comparing a propagation delay of a first signal path comprising the first cable and the first conducting structure on the printed circuit board, and a propagation delay of a second signal path comprising the second cable and the second conducting structure on the printed circuit board; and removing conductive material of the first conducting structure and/or of the second conducting structure, in order to modify an electrical length of the first conducting structure and/or of the second conducting structure, to obtain a first conducting path and a second conducting path, in dependence on a result of the comparison, in order to reduce a difference of the propagation delays between the first signal path and the second signal path.

A printed circuit board includes a body and a belly pad seated within with the body. The belly pad is electrically separated into a first pad and a second pad. The first pad and the second pad are arranged to be electrically connected to one another by an interconnect electrically connecting the belly pad to a conductive plane of an electrical component, thereby allowing continuity testing across an interface between the first pad and the interconnect. Methods of testing continuity in electrical assemblies are also disclosed.