A surge protection device includes, in one embodiment, a reversible surge responder operative to engage an inner conductor engager during a protect mode and disengage the inner conductor engager during a normal mode. The surge responder returns to the normal mode from the protect mode without the intervention of an operator or service technician to replace or re-set the surge responder.

A method for forming a Z-directed component for insertion into a mounting hole in a printed circuit board according to one example includes filling a first cavity having a tapered surface with a body material. A first layer of a constraining material is provided on top of the first cavity and has a second cavity having a width that is smaller than the first cavity. The second cavity is filled with the body material. Successive layers of the constraining material are provided on top of the first layer of the constraining material. Cavities of the successive layers of the constraining material are selectively filled with at least the body material to form layers of the main body portion of the Z-directed component. The constraining material is dissipated to release the Z-directed component from the constraining material and the Z-directed component is fired.

A printed circuit board includes: a first electrode made of a tubular electric conductor formed on an inner wall of a first hole formed in the printed circuit board; a dielectric body disposed inside the first electrode; and a second electrode made of a tubular electric conductor formed on an inner wall of a second hole extending through the dielectric body, the second electrode having a center axis concentric with the first electrode.

A transmission line includes a first structure including a first flexible resin base material, and a first ground conductor thereon, a second structure including a second flexible resin base material, and a first signal line and an interlayer connection conductor in or on the second resin base material, a first spacer between the first and second structures, and a first metal joining material joining the first and second structures with the first spacer interposed therebetween. A first hollow portion is between the first and second structures with the first spacer interposed therebetween. The first signal line and the first ground conductor face each other in a joining direction with the first hollow portion interposed therebetween. The first resin base material and the second resin base material are not in contact with each other. The first metal joining material has a melting point lower than that of the interlayer connection conductor.

A downhole system including a gun string configured to be deployed into a wellbore, the gun string including plural gun assemblies. A detonator block attached to a given gun assembly of the plural gun assemblies. The detonator block includes a switch assembly. The switch assembly includes a communication unit (CU) configured to receive, from an external controller, a fire command to activate a detonator associated with the detonator block, a measuring unit configured to measure a parameter (V) at the switch assembly, and a computing core (CC) configured to locally make a decision whether to activate or not the detonator, after the fire command is received from the external controller, based on whether a voltage measured by the measuring unit at the switch assembly is larger or not than a threshold voltage.

A circuit board with a connector connection for the direct contacting with a connector, wherein the connector connection is formed on the front side of the circuit board with a contact pin that is arranged centrally in a blind hole while forming a circular ring-shaped cylindrical insertion space and that has an inner hole with a first contact zone of an inner conductor for contacting an inner conductor of the connector. A second contact zone of an outer conductor is arranged in the insertion space for contacting an outer conductor of the connector.

A wiring board includes a wiring board body and a coaxial connector. The coaxial connector includes coaxial terminals and a housing. The coaxial terminals are arranged in row. Each of the coaxial terminals includes a signal terminal and a ground terminal. The ground terminal includes a tubular main body and first and second contact pieces that respectively extend from the main body and respectively include first and second contact portions in contact with the wiring board body, in a transparent plan view seen through the wiring board along a normal direction of the wiring board body. A part of the first contact piece of a first coaxial terminal overlaps with a part of the second contact piece of a second coaxial terminal adjacent to the first coaxial terminal.

A printed circuit board includes a connector insertion area including many rows of crimping holes, each row of crimping holes includes at least two pairs of signal crimping holes (SCHs), and each pair of SCHs includes two SCHs. In a row arrangement direction of the crimping holes, at least one ground crimping hole (GCH) is arranged on either side of each pair of SCHs. A depth of the GCH is greater than or equal to a depth of the SCH, the GCH includes a main hole and a shielding component on at least one side of the main hole, a part of a side wall of the main hole is a part of a side wall of the shielding component, and a sum of lengths of the main hole and the shielding component in a first direction is greater than a length of the SCHs in the first direction.

An integrated circuit package comprising an encapsulant, a semiconductor die in the encapsulant the semiconductor die comprising a plurality of die terminals, an integrated waveguide launcher, wherein the integrated waveguide launcher is connected to one of the die terminals and a land grid array provided on a bottom surface of the package. The land grid array comprises a plurality of package terminals, each package terminal configured to be soldered to a printed circuit board, and an opening, wherein the opening is aligned with the integrated waveguide launcher.

In one embodiment, a system includes a first circuit defining recesses along an edge of the first circuit board, and a second circuit board defining fins extending from at least one outer edge of the second circuit board. The fins of the second circuit board are positioned within the recesses of the second circuit board to connect the circuit boards in a co-planar manner. The fins and recesses may be shaped to provide an interlocking connection of the first and second circuit boards in the co-planar direction.