The invention provides a stacked structure of circuit boards applied to a data storage device. The stacked structure comprises a main circuit board and a slave circuit board. The main circuit board comprises a controller, a plurality of flash memories, a first connector, and a first transmission interface. The slave circuit board comprises an operation management chip, a second connector, and a second transmission interface. The operation management chip comprises a microprocessor and a network communication element. The slave circuit board is stacked on the main circuit board, and connected to the first connector of the main circuit board via the second connector. When the slave circuit board receives a specific operation instruction, the microprocessor of the slave circuit board will transmit the specific operation instruction to the electronic apparatus via the second transmission interface, the electronic apparatus executes a corresponding operation according to the specific operation instruction.

A method of manufacturing a semiconductor device prepares contact members, each of which has a cylindrical through-hole, and column-shaped connection terminals, each having a polygonal shape in a cross-sectional view along a length direction thereof, wherein a length of a diagonal of the polygonal shape is greater than an inner diameter of the through-holes. Chamfers with a curvature for fitting an inner surface of the through-holes are formed at corners of the connection terminal, and the connection terminals are press-fitted into the through-holes of the contacts. By doing so, the area of contact where the connection terminals press-fitted into the contacts contact the inner circumferential surfaces of the through-holes of the contacts is increased. This increases the tensile load of the connection terminals fitted into the contacts.

An integrated multilayer structure includes a substrate film including an electrically insulating material; a circuit design including electrically conductive elements provided on the substrate film, the conductive elements defining a number of contact areas; a connector at the edge of the substrate film, the connector including a number of electrically conductive elongated contact elements, such as pins, connected to the contact areas of the conductive elements of the circuit design on the substrate film while further extending from the substrate film to couple to an external connecting element responsive to mating the external connecting element with the connector; and at least one plastic layer molded onto the substrate film so as to at least partially cover the circuit design and only partially cover the connector.

Circuit board assembly, Display apparatus, Terminal, and Signal processing system. The circuit board assembly comprises a first circuit board, a second circuit board, a third circuit board, and multiple differential signal lines; the first circuit board comprises a first connector which comprises a first lead group comprising N first leads and a second lead group comprising N second lead; the second circuit board comprises a second connector which comprises a third lead group comprising N third leads and a fourth lead group comprising N fourth leads; multiple i-th leads and multiple (i+2)-th leads are in one-to-one correspondence, and the i-th leads and the corresponding (i+2)-th leads are arranged along a first direction; a first differential line of a j-th differential signal line is connected to the (2j−1)-th i-th lead and the (2j−1)-th (i+2)-th lead, its second differential line is connected to the 2j-th i-th lead and the 2j-th (i+2)-th lead.

A probe card device includes a probe head including a plurality of pins, wherein each of the pins includes a body, a first metal layer formed on the body, and a second metal layer covering the first metal layer; a multi-layered flexible board electrically connected to the pins; a support plate, the multi-layered flexible board disposed on a first surface of the support plate; and a circuit board electrically connected to the multi-layered flexible board.

A surface mount technology (SMT) terminal header is described for providing an electrical connection to a first printed circuit board (PCB). The SMT terminal header includes multiple first electrically conductive connector elements each having a base configured for surface mount attachment to the first PCB, and an insulative housing having multiple cells and a fixation member configured to attach the housing to the first PCB. Each of the multiple cells is configured to at least partially house one of the multiple first electrically conductive connector elements. Each of the first electrically conductive connector elements includes a position assurance member configured to attach the first electrically conductive connector element to at least one of the multiple cells of the insulative housing.

A wiring substrate includes a resin insulating layer, a conductor pad formed on the resin insulating layer, a coating insulating layer formed on the resin insulating layer such that the coating insulating layer is covering the conductor pad, and a metal post connected to the conductor pad and protruding from the coating insulating layer such that a gap is formed between the metal post and the conductor pad at a peripheral edge of the metal post. The coating insulating layer is formed such that the coating insulating layer has an interposed portion formed in the gap between the metal post and the conductor pad at the peripheral edge of the metal post.

A power semiconductor module has a substrate, load and auxiliary connector elements, and a plastic body, which preferably is a housing or a housing frame and which has a channel. The channel being for the arrangement of a compensating portion of a press-fit contact element. The press-fit contact element has a press-fit portion, a compensating portion and a foot portion, the compensating portion being elastic in a longitudinal direction of the press-fit contact element and having at least two O-shaped sub-portions arranged in succession in the longitudinal direction and having a constriction arranged between two sub-portions.

A power module includes a power source module and a metallic heat-dissipation substrate. The power source module has an input pin and an output pin soldered on and electrically connected with a system board and includes a printed circuit board. The printed circuit board has a first surface and a second surface. At least a heat-generating component is disposed on the second surface. The metallic heat-dissipation substrate has a first surface and a second surface opposite to each other. The first surface has at least a fixing position and at least a heat-dissipating position. The fixing position is directly or indirectly connected with the second surface. A gap accumulated by tolerances is existed between the heat-dissipating position and the heat-generating component. A gap-filling material is filled into the gap. The second surface and the system board are soldered with each other. Therefore, the heat-dissipation efficiency is enhanced.

A connector device that includes a circuit board; a connector attached to the circuit board; a plurality of collars for external attachment; a first molded resin that is made of a first resin material whose melting point or softening point is 230° C. or less, and covers the entire circuit board and part of the connector; and a second molded resin that is welded to the first molded resin, is made of a second resin material whose melting point or softening point is higher than that of the first resin material for the first molded resin, and covers outer circumferences of the collars.