Provided are a circuit board component and a terminal. The circuit board component includes: a circuit board and a wire disposed on the circuit board, where the wire includes a first portion and a second portion, a line width of the first portion is greater than or equal to a line width threshold, and a line width of the second portion is less than the line width threshold.

An electronic circuit, comprising: an integrated substrate structure comprising one or more electrically conductive traces comprising plating on a laser-etched, non-conductive isolated portion of the integrated substrate structure defining each electrically conductive trace; one or more electrically conductive pads at one or more predetermined positions along the one or more electrically conductive traces; and an electrical component surface mounted to the at least one electrically conductive pad with interconnect and bonding material.

The method for removing partial metal wall of hole of the present invention includes the following steps. First, a circuit board is provided. The circuit board includes a plurality of circuit layers, a plurality of dielectric layers, and a plated through hole. Each of the dielectric layers is between two adjacent circuit layers. The wall of the plated through hole includes at least one residual copper. The circuit layer immediately below the residual copper is defined as a signal layer. Next, a position of the signal layer and a position of the residual copper in the plated through hole are obtained. Next, a drill is provided, the drill includes a main body and at least one needle, and the drill is moved to the position of the residual copper. The main body is rotated around the central axis of the main body, so the needle can remove part of the residual copper.

A substrate includes electrically-conductive tracks. A semiconductor chip is arranged on the substrate and electrically coupled to selected ones of the electrically-conductive tracks. Containment structures are provided at selected locations on the electrically-conductive tracks, where the containment structures have respective perimeter walls defining respective cavities. Each cavity is configured to accommodate a base portion of a pin holder. These pin holders are soldered to the electrically-conductive tracks within the cavities defined by the containment structures. Each containment structure may be formed by a ring of resist material configured to receive solder and maintain the pin holders in a desired alignment position.

A multilayer substrate includes a resin multilayer body including, in a lamination direction, first and second laminate portions respectively including first and second thermoplastic resin layers, and a first interlayer connection conductor extending through the first thermoplastic resin layer. A storage elastic modulus of the first thermoplastic resin layer is lower than that of the second thermoplastic resin layer at a measurement temperature equal to or higher than a minimum melting point among melting points of metallic elements included in the first interlayer connection conductors and equal to or lower than melting points of the first thermoplastic resin layer and the second thermoplastic resin layer.

An air transport unit comprising a composite board. The composite board comprising an anode layer and a cathode layer of an electrically conducting material. The anode layer and cathode layer are separated by an insulator of an electrically insulating material. The composite board further comprising an electric component in electrical connection with the anode layer and the cathode layer. The air transport unit further comprising a carrier board, wherein the composite board and the carrier board each have a duct forming surface, which carrier board and composite board are arranged so that an air duct forms between the duct forming surfaces.

A printed wiring board includes one or more substrates, the one or more substrates including at least a first substrate, the first substrate being formed with a pad and a ground layer at any one of main surfaces of the first substrate, the pad being to be electrically connected to a connector as another component, the ground layer being formed to surround the pad from a circumference of the pad and have an inner edge at a location separated from an outer edge of the pad with a predetermined distance, the ground layer being to be grounded to a ground contact.

The present disclosure generally relates to a shielded three-layer patterned ground structure in a PCB. The PCB may be disposed in a hard disk drive. To reduce costs, PCBs are being made with only four total layers separated by dielectric material. Conductive traces in PCBs can have the problem of common mode current flowing through the traces and thus increasing the magnitude of EMI noise. By providing a shielded three-layer patterned ground structure, not only is the cost reduced, but so is the common mode current and the magnitude of EMI noise, all without any negative impact to the differential signal.

A carrier comprises: a main body made of a material comprising a thermal conductivity of at least 380 W/(m K), wherein the main body comprises a mounting surface for mechanical and thermal connection with a component, wherein the main body comprises a recess which penetrates the main body along a first direction perpendicular to the main extension plane of the main body, an electrically insulating filler is arranged in the recess, which comprises a further recess penetrating the filler along the first direction, an inner wall of the filler surrounding the further recess is provided with an electrically conductive coating to form a via through the main body.

Certain aspects of the present disclosure relate to methods and apparatus for allocating resources for the transmission of scheduling requests based on UE traffic profiles. In one embodiment, a base station determines, for one or more user equipments (UEs), a type of traffic to be exchanged between the one or more UEs and the base station. The base station allocates resources for the one or more UEs to use for sending a scheduling request based, at least in part, on the type of traffic associated with each of the one or more UEs. The base station signals an indication of the allocated resources to each of the one or more UEs.