A printed circuit board includes a substrate base including first and second inner base layers, a plurality of cover base layers, and a screw hole extending from a top to a bottom surface of the substrate base. At least one first cover base layer is disposed on the first inner base layer. At least one second cover base layer is disposed on the second inner base layer. A heat pipe is disposed along an interface between the first and second inner base layers. A ground conductive layer is disposed on at least one of the top surface and the bottom surface of the substrate base at an edge of the screw hole. A first heat dissipating structure is positioned between the top and bottom surfaces of the substrate base. The first heat dissipating structure is connected to the heat pipe and is in direct contact with the ground conductive layer.

Provided is a conductive member including a busbar having a through hole, and a metal member fixed to the busbar, the metal member including a shaft portion passed through the through hole, and a first head portion at one end portion of the shaft portion, the first head portion having an outer diameter larger than the diameter of the through hole. Since the metal member includes the first head portion, it is possible to increase the heat capacity of the metal member as compared with that achieved with a conventional conductive member that does not include the first head portion. Accordingly, it is possible to further increase the heat dissipation of the conductive member using a simple configuration.

A method for producing a semiconductor device is provided. A growth substrate having a first side and an opposite second side is provided. At least one electronic component is produced by depositing and/or structuring at least one layer on the first side of the growth substrate, said layer containing or consisting of at least one compound semiconductor. The first side of the electronic component that is opposite the first side of the growth substrate is connected to a support. The growth substrate is removed. The support has at least one feed-through and/or at least one conductor track, which is connected to at least one terminal contact of the electronic component. Alternatively or in addition, a semiconductor device produced in this way and a support having such a semiconductor device may be provided.

A circuit includes a printed circuit board including a first portion defining a window formed as a first void on a first side of the printed circuit board and a second portion defining a cavity formed as a second void opposite the first void on a second side of the printed circuit board. The circuit further includes a heat sink inserted in the second void, the heat sink having a first side forming a bottom of the first void and the bottom of the first void within the printed circuit board. The circuit yet further includes at least one electronic circuit die mounted to the first side of the heat sink and electrically coupled to the first side of the printed circuit board.

A heat dissipating substrate includes a substrate in a quadrangular shape, including a first main surface and a second main surface opposite to the first main surface, and heat dissipators arrayed and embedded in the substrate, made of a carbon material in which six-membered rings are connected by a covalent bond and each of a plurality of surfaces are bonded by van der Waals forces, and the plurality of surfaces of the heat dissipators, and including a third main surface located on the first main surface side in a thickness direction and a fourth main surface opposite to the third main surface. The heat dissipators have a first heat dissipator and a second heat dissipator that each have anisotropy of thermal conductivity.

An amplifier module includes a module substrate with a mounting surface, and a thermal dissipation structure that extends through the module substrate. A ground contact of a power transistor die is coupled to a surface of the thermal dissipation structure. Encapsulant material covers the mounting surface of the module substrate and the power transistor die, and a surface of the encapsulant material defines a contact surface of the amplifier module. A ground terminal is embedded within the encapsulant material. The ground terminal has a proximal end coupled to the thermal dissipation structure, and a distal end exposed at the contact surface. The ground terminal is electrically coupled to the ground contact of the power transistor die through the thermal dissipation structure.

Disclosed are an embedded circuit board and a fabrication method therefor. The embedded circuit board comprises: a circuit board body; signal transmission layers (1200), wherein the signal transmission layers are arranged on two opposite sides of the circuit board body; bonding layers, wherein the bonding layers are arranged between at least one signal transmission layer and the circuit board body and used for bonding the signal transmission layer to the circuit board body; metal bases which are embedded in the circuit board body and are electrically connected to the signal transmission layers on two opposite sides of the circuit board body; conductive parts which are arranged at the positions in the bonding layers corresponding to the metal bases, and are electrically connected to the signal transmission layer and the metal bases; and magnetic cores embedded in the circuit board body.

A power amplifier module includes a module substrate. First and second heat dissipation structures extend through the module substrate, and each has a first surface exposed at a mounting surface of the module substrate, and a second surface exposed at a bottom surface of the module substrate. The first surfaces of the first and second heat dissipation structures are physically separated by a portion of the mounting surface. First and second amplifier dies are coupled to the first surface of the first heat dissipation structure. The first amplifier die includes a first power transistor that functions as a driver amplifier. The second amplifier die includes a second power transistor that functions as a first final amplifier. The third amplifier die is coupled to the first surface of the second heat dissipation structure, and the third amplifier die includes a third power transistor that functions as a second final amplifier.

An apparatus for providing a safety and EMC compliant heat sink. The apparatus includes a heat sink configured to be attached to an internal power plane of a printed circuit board (PCB). The heat sink includes a plurality of fins extending outward from the heat sink. The apparatus further includes a compliance cage configured to be connected to a ground portion of the PCB, the compliance cage surrounding at least a portion of the heat sink. At least one capacitor plate contacting at least a portion of the compliance cage and extending inwards towards the heat sink and interleaving with the plurality of fins is present. Dielectric spacers are provided to fill a portion of the space between the capacitor plates and the heat sink fins.

A first substrate includes a first surface and a second surface opposite to the first surface. A second substrate includes a third surface and a fourth surface opposite to the third surface. A third substrate includes a fifth surface and a sixth surface opposite to the fifth surface. The first substrate is made of an insulator, and includes a mounting portion for mounting an electronic element at the first surface, and the mounting portion is a rectangular shape. The third substrate is made of a carbon material, and the fifth surface is connected to at least the second surface at location overlapped with the mounting portion in plan view. The third substrate has a larger heat conduction in a direction perpendicular to the longitudinal direction of the mounting portion than heat conduction in the longitudinal direction of the mounting portion in plan view.