A conductive ball includes a copper ball, a nickel layer formed with being patterned on an outer surface of the copper ball, and a tin-based solder covering each outer surface of the copper ball and the nickel layer.

An electronic device includes a component, an electronic component, and a joining material arranged between a surface of the component and a surface of the electronic component. Spacer elements are embedded in the joining material. Interconnects are arranged between the spacer elements and the surface of the component, and between the spacer elements and the surface of the electronic component.

An antenna structure can include a printed circuit board module and a mold compound disposed on a side of the printed circuit board module. A planar antenna is defined by a conformal shield layer disposed on a first surface of the mold compound such that the mold compound is disposed between the printed circuit board module and the conformal shield layer. The thickness of the mold compound layer and the shape of the conformal shield layer can be varied to optimize a performance of the antenna.

A conductive structure of a massage roller includes a working circuit board, a conductive base, a conductive plate, two first conductive parts and two second conductive parts. The working circuit board and the conductive plate are positioned at upper and lower ends of the conductive base respectively. The conductive base is provided with at least a pair of accommodating cavities, and conductors are placed in the accommodating cavities. The two first conductive parts are positioned on the bottom surface of the working circuit board, and the first conductive parts are connected with the working circuit board. The two second conductive parts are positioned on the top surface of the conductive plate, and the second conductive parts are connected with the conductive plate; and the top surfaces of the conductors abut against the two first conductive parts, and the bottom surfaces of the conductors abut against the two second conductive parts.

Provided is a circuit board interconnection structure including: a first circuit board including a first substrate and a first electrode formed on a surface of the first substrate; a second circuit board including a second substrate and a second electrode formed on a surface of the second substrate; one or more joining portions formed of a metal-containing conductive material for joining the first and second electrodes, interposed between the first and second electrodes; and a reinforcing resin portion for reinforcing the one or more joining portions. The first electrode is a transparent electrode including a metal oxide film. A first abutting portion of the joining portion abutting the first electrode, is formed by adhesional wetting of the first electrode with the conductive material.

The present invention provides a conductive ball, which can be used as a connector by intervening between electrodes to apply a current between the electrodes with relatively high conductivity, and which is prevented from decreasing the conductivity due to the following thermal history. The conductive ball of the present invention comprises a sphere formed of an elastic body; a thermal expansion-resistant resin shell applied so as to coat the surface of the sphere; and a conductive metal shell applied so as to coat the outer surface of the thermal expansion-resistant resin shell. For example, the sphere is formed of a silicone rubber, the thermal expansion-resistant resin shell is formed of a polyimide, and the conductive metal shell is formed of copper, gold, silver, or palladium, or an alloy containing it.

A method of manufacturing a test socket includes preparing a printed circuit board (PCB) on which a bonding pad is disposed, bonding a conductive wire on the bonding pad, mounting, on an upper surface of the PCB, a space through which the bonding pad is exposed, mounting, on an upper surface of the space, a base through which the bonding pad is exposed, mounting, on an upper surface of the base, a jig which covers the bonding pad, and injecting a liquid silicone rubber into a jig assembly by using the jig assembly as a mold, the jig assembly including the PCB, the space, the base, and the jig.

A method of manufacturing a vibrator which includes a method of manufacturing a wiring board includes disposing one granular conductor within each of through holes of a ceramic substrate having the through holes formed therein, supplying a glass paste into the through holes, baking the glass paste, forming an electrode, and disposing a vibrator element and a lid. When a maximum diameter of the granular conductor is set to d.sub.1 and a minimum diameter of each of the through holes is set to d.sub.2, d.sub.1/d.sub.2 is preferably equal to or greater than 0.8 and equal to or less than 1.

A wiring board according to the present disclosure includes a base, a wiring conductor located on a surface of the base, a support body including a conductor on a surface thereof, and a first fixing member connecting the wiring conductor and the support body. The wiring conductor includes a first signal wiring conductor having a first region facing the support body and a second region extending continuously from the first region. The conductor of the support body includes a third region facing the first region of the first signal wiring conductor and a fourth region adjacent to the second region of the first signal wiring conductor. The first fixing member is located at a place other than the fourth region.

A semiconductor device includes a printed circuit board that includes a first electrode, a resin substrate that includes a first face directed toward the printed circuit board, a second electrode formed in a second portion surrounding a first portion of the first face, a second face opposite the first face, and a third electrode formed in a third portion of the second face, the third portion overlapping the first portion in a plan view, a semiconductor chip that includes a coupling terminal joined to the third electrode, a conductive member that is formed between the printed circuit board and the resin substrate and contains a conductive particle and resin, and a solder bump that is formed between the printed circuit board and the resin substrate and is joined to the first electrode and the second electrode.