A power tool including an electric motor is provided. The tool includes a substantially disc-shaped printed circuit board (PCB), power switches mounted on the PCB; magnetic sensors mounted on the PCB facing the motor; a heat sink in thermal communication with the power switches disposed between the PCB and the electric motor; and a molded casing structurally securing the heat sink relative to the PCB. The molded casing includes a center opening, at least one first opening provided at a first radial distance from the center opening arranged to receive the magnetic sensors therein, and at least one second opening provided at a second radial distance from the center opening arranged to securely receive the heat sink therein.

Embodiments include a microelectronic device package structure having an inductor within a portion of a substrate, wherein a surface of the inductor is substantially coplanar with a surface of the substrate. One or more thermal interconnect structures are on the surface of the inductor. A conductive feature is embedded within a board, where a surface of the conductive feature is substantially coplanar with a surface of the board. One or more thermal interconnect structures are on the surface of the conductive feature of the board, where the thermal interconnect structures provide a thermal pathway for cooling for the inductor.

A circuit structure is provided to which an electronic component can be easily mounted (electrical connection of terminals). A circuit structure that includes a substrate provided with a conductive pattern on one face thereof; a conductive member fixed to the other face of the substrate; an electronic component that has first terminals and of a plurality of terminals, that are electrically connected to the conductive member, and a second terminal of the plurality of terminals that is electrically connected to the conductive pattern provided on the substrate; and a relay member for electrically connecting the second terminal and the conductive pattern provided on the substrate, at least a portion of the relay member being fixed to the conductive member via an insulating material.

A device includes a printed circuit board assembly having a printed circuit board and one or more electronic components disposed on the printed circuit board, and a nanofilm disposed on the printed circuit board assembly. The nanofilm includes an inner coating in contact with the printed circuit board assembly, the inner coating including metal oxide nanoparticles having a particle diameter in a range of 5 nm to 100 nm; and an outer coating in contact with the inner coating, the outer coating including silicon dioxide nanoparticles having a particle diameter in a range of 0.1 nm to 10 nm.

A method of manufacturing a printed circuit board includes providing a printed circuit board (PCB) substrate including at least one insulating layer and first and second conductive layers separated from one another by the at least one insulating layer, forming a first via hole in the PCB substrate extending from the first conductive layer to the second conductive layer, where the first via hole is defined by a first sidewall of the PCB substrate, forming a second via hole in the PCB substrate, where the second via hole is defined by a second sidewall of the PCB substrate, and selectively plating the first sidewall and the second sidewall to form a first via and a second via, respectively, where the first via and the second via have different via sidewall thicknesses.

A power converter assembly includes an interposer; an integrated circuit, such as a power management integrated circuit, arranged in a cavity or pocket of the interposer or monolithically integrated in the interposer; one or more electrical components stacked on a top side of the interposer; and one or more vias arranged in the interposer forming electrical connections in the interposer, wherein the integrated circuit and the electrical components are configured to perform a power conversion of an input voltage to an output voltage.

An electronic switch and control module for a power tool having an electric motor is provided. The module includes a module housing including a bottom surface, side walls, and an open face, a printed circuit board (PCB) received from the open face of the module housing and securely disposed within the module housing at a distance from the bottom surface of the module housing; power switches mounted on a top surface of the PCB, and heat sinks discretely arranged and each mounted over a respective one of the plurality of power switches and secured to the top surface of the PCB to transfer heat away from the power switch through the open face of the module housing. The module further includes an input unit having conductive tracks disposed on the PCB and an electro-mechanical element engaging the plurality of conductive tracks, the input unit generating a signal for controlling a switching operation of the plurality of power switches, and a controller mounted on the PCB configured to control the switching operation of the power switches based on the signal from the input unit.

A power module is disclosed. The power module includes a first substrate, a first metal layer, at least one conductive structure and at least one power device. The first metal layer is disposed on the first substrate. The first metal layer has a first thickness d1. The first thickness d1 satisfies: 5 μm≦d1≦50 μm. The conductive structure is disposed at a position different to the first metal layer on the first substrate. The conductive structure has a second thickness d2. The second thickness d2 satisfies: d2≧100 μm. The power device is disposed on the first substrate, the first metal layer or the conductive structure. The driving electrode of the power device is electrically connected to the first metal layer. The power electrode of the power device is electrically coupled to the conductive structure.

A power tool including an electric motor is provided. The tool includes a substantially disc-shaped printed circuit board (PCB), power switches mounted on the PCB; magnetic sensors mounted on the PCB facing the motor; a heat sink in thermal communication with the power switches disposed between the PCB and the electric motor; and a molded casing structurally securing the heat sink relative to the PCB. The molded casing includes a center opening, at least one first opening provided at a first radial distance from the center opening arranged to receive the magnetic sensors therein, and at least one second opening provided at a second radial distance from the center opening arranged to securely receive the heat sink therein.

An article for a power inverter, includes a multilayer printed circuit board having a first and second electrically conductive wiring layer and at least a first dielectric layer interposed between the first and second electrically conductive wiring layers. Each conductive wiring layer includes a common input and output line, the common input and output lines at least partially overlapping one another in a projection along a thickness of the multilayer printed circuit board. A set of input mounting pads is carried by the first common input line and a set of input mounting pads is carried by the second common input line, the input mounting pads of the second set of input mounting pads are interleaved with the input mounting pads of the first set of input mounting pads along a first axis. The article further includes a set output mounting pads carried by the common output line.