Embodiments presented in this disclosure generally relate to techniques for interconnecting integrated circuits. More specifically, embodiments disclosed herein provide a back mounted interposer (BMI) to facilitate interconnecting of integrated circuits. One example apparatus includes an integrated circuit, an interposer, and a circuit board, at least a portion of the circuit board being disposed between the integrated circuit and the interposer, where the circuit board is configured to provide electrical connection between the interposer and the integrated circuit via connection elements on a first surface of the interposer. The apparatus also includes an interface on a second surface of the interposer, the interface being configured to provide signals from the integrated circuit to an electrical component.

Disclosed is an electronic device comprising a first component, a second component, and a signal path interface coupled between the first component and the second component, the signal path interface including a printed circuit board (PCB) having a rigid PCB portion and a flexible PCB portion, wherein a first signal line and a second signal line extend through the rigid PCB portion and the flexible PCB portion for transmitting signals from the first component to the second components, and a plurality of ground lines extend through the rigid PCB portion and the flexible PCB portion, and wherein each of the plurality of ground lines extending through the rigid PCB portion is connected to one or more conductive layers through conductive vias.

A system of circuit card components each include through-holes for soldering having recessed copper layers for thermal insulation. Thermal insulation prevents heat conduction away from flowing solder, allowing the solder to flow freely through the through-hole. Even high-temperature, lead-free solders may maintain the necessary temperature to flow. Different circuit layers include specialized features based on distance from a top or bottom surface. Vias surrounding the through-hole maintain the necessary cross-sectional area for electrical connectivity.

A circuit board device includes a multilayer structure, a main ground area and a circuit module. The multilayer structure includes a plurality of plates. The main ground area is arranged in the multilayer structure. The circuit module includes a differential signal circuit and a surrounding circuit module. The differential signal circuit is located in the multilayer structure, and includes a positive signal pad and a negative signal pad. The positive signal pad is located on a configuration surface of one of the plates. The negative signal pad is located on the disposition surface, and is separated from the positive signal pad. The surrounding circuit module is located on the disposition surface, and electrically connected to the main ground area. The surrounding circuit module surrounds the positive signal pad and the negative signal pad in an enclosing way, and is physically separated from the differential signal circuit.

Power amplifier systems including power amplifier modules (PAMs) and electromagnetic bandgap (EBG) isolation structures are disclosed. In embodiments, the power amplifier system includes a printed circuit board (PCB) and a PAM mounted to the PCB in an inverted orientation. The PCB has a PCB frontside on which a PAM mount region is provided, and radio frequency (RF) input and output bondpads. The PAM includes a topside input/output interface having RF input and output terminals electrically coupled to the RF input and output pads, respectively. The power amplifier system further includes a first EBG isolation structure containing a first grounded EBG cell array, at least a portion of which is located within or beneath the PAM mount region.

In one embodiment, an apparatus generally comprises a printed circuit board comprising a first side, a second side, and a plurality of power vias extending from the first side to the second side, the first side configured for receiving an application specific integrated circuit (ASIC), and a power delivery board mounted on the second side of the printed circuit board and comprising a power plane interconnected with power vias in the power delivery board to electrically couple voltage regulator modules and the ASIC. The voltage regulator modules are mounted on the second side of the printed circuit board.

A high-frequency circuit includes a first electric conductor layer, a first dielectric layer, a circuit layer, a second dielectric layer, a second electric conductor layer arranged in this order, and the circuit layer includes a ground pattern and a transmission line of a high-frequency signal. An electromagnetic wave shield is disposed around the transmission line. The electromagnetic wave shield includes a ground electric conductor on inner surfaces of a plurality of holes extending through the first dielectric layer, the ground pattern, the second dielectric layer, the first electric conductor layer, and the second electric conductor layer. The plurality of holes are a plurality of elongated holes provided at an interval in a direction in which the transmission line is surrounded. In each of the plurality of elongated holes, a longitudinal dimension in the direction in which the transmission line is surrounded is larger than a width dimension.

An electronic device includes: a first printed circuit board (PCB) including a first plate and a first hole formed in the first plate, a second PCB including a second plate, an interposer including a third plate positioned between the first plate and the second plate, a plurality of first vias connecting the first plate and the third plate, a plurality of second vias connecting the second plate and the third plate, and a first reinforcement portion positioned in the first hole to bond the first plate and the third plate.

A board-level pad pattern includes a printed circuit board (PCB) substrate; an exposed pad region disposed within a surface mount region of the base substrate; and multiple staggered ball pads disposed within the surface mount region arranged in a ring shape around the exposed pad region. The staggered ball pads includes first ball pads arranged in a first row and second ball pads arranged in a second row. The first ball pads in the first row are arranged at two different pitches, and the second ball pads in the second row are arranged at a constant pitch. Multiple square-shaped ball pads are arranged in a third row between the exposed pad region and the staggered ball pads.

A quantum computer includes a refrigeration system under vacuum including a containment vessel, a qubit chip contained within a refrigerated vacuum environment defined by the containment vessel. The quantum computer further includes a plurality of interior electromagnetic waveguides and a plurality of exterior electromagnetic waveguides. The quantum computer further includes a hermetic connector assembly operatively connecting the interior electromagnetic waveguides to the exterior electromagnetic waveguides while maintaining the refrigerated vacuum environment. The hermetic connector assembly includes an exterior multi-waveguide connector, an interior multi-waveguide connector, and a dielectric plate arranged between and hermetically sealed with the exterior multi-waveguide connector and the interior multi-waveguide connector. The dielectric plate permits electromagnetic energy when carried by the interior and exterior pluralities of electromagnetic waveguides to pass therethrough.