A wiring substrate includes a wiring layer on a projection of an insulating layer. The wiring layer includes a first metal layer on an end face of the projection with a peripheral portion of the end face exposed, a second metal layer that is on the first metal layer and wider than the end face, and a third metal layer. The second metal layer includes first and second opposite surfaces with the second surface on the first metal layer with a peripheral portion thereof exposed. The third metal layer covers side surfaces of the first metal layer, and the first surface, the peripheral portion of the second surface, and side surfaces of the second metal layer, and fills in a region where the end face and the peripheral portion of the second surface face each other. The materials of the second and third metal layers are different.

A radio IC device includes an electromagnetic coupling module includes a radio IC chip arranged to process transmitted and received signals and a feed circuit board including an inductance element. The feed circuit board includes an external electrode electromagnetically coupled to the feed circuit, and the external electrode is electrically connected to a shielding case or a wiring cable. The shielding case or the wiring cable functions as a radiation plate. The radio IC chip is operated by a signal received by the shielding case or the wiring, and the answer signal from the radio IC chip is radiated from the shielding case or the wiring cable to the outside. A metal component functions as the radiation plate, and the metal component may be a ground electrode disposed on the printed wiring board.

An electronic device and a shielding film are disclosed herein. The electronic device includes a printed circuit board and at least one electrical component mounted on the printed circuit board. The shielding film is disposed on at least a part of the printed circuit board to block electromagnetic waves generated by the printed circuit board and/or the electronic component. The shielding film includes a plurality of layers, and is attached to at least part of the printed circuit board and contacting an upper side surface of the electronic component, wherein at least part of the shielding film includes a nano-conductive fiber and is electrically connected with a ground part of the printed circuit board through the nano-conductive fiber.

An optical module includes a housing, a heat sink apparatus arranged in and thermally connected to the housing, and a printed circuit board partially arranged on the heat sink apparatus. The optical module further includes a first optoelectronic chip and a second optoelectronic chip that are both arranged on the heat sink apparatus. The first optoelectronic chip and second optoelectronic chip are both electrically connected to the printed circuit board. The printed circuit board has a first surface, a second surface opposite to the first surface, and an opening that extends from the first surface to the second surface. The second optoelectronic chip is arranged at the opening. The second optoelectronic chip is arranged separately from the first optoelectronic chip.

An electronic component module includes a substrate with a first main surface and a second main surface. Mount electronic components and a second conductive member are mounted on the second main surface, and the second conductive member is disposed between the mount electronic component and the mount electronic component. The second conductive member is connected to a shield film disposed near the second main surface through a depression. Mount electronic components and a first conductive member are mounted on the first main surface, and the first conductive member is disposed between the mount electronic component and the mount electronic component. The first conductive member is connected to a shield film disposed near the first main surface through a depression.

A capacitive coupling system includes a plurality of conductive pads situated on a dielectric layer. A plurality of switches are connected between pairs of the conductive pads via conductive linkages. The switches are operable to selectively connect selected pairs of the conductive pads to selectively adjust capacitances between conductor pairs of an electrical connector.

An electronic device may include a noise shielding device that may include: a substrate including at least one heat generating component; a metallic shield cover that is disposed on the substrate to enclose the at least one heat generating component; a metal housing disposed around the shield cover; and a heat transfer member that is configured to transfer heat emitted from the heat generating component through an opening formed at a position corresponding to the heat generating component to the metal housing, wherein the metallic shield cover includes a plurality of tension fingers that protrude at predetermined intervals and contact a bottom face of the metal housing, and noise emitted from the heat generating component is shielded by a shielding region that is formed by the tension fingers and the metal housing.

A method for manufacturing an interconnect structure and an interconnect structure are provided. The method includes: forming an opening in a substrate; forming a low-k dielectric block in the opening; forming at least one via in the low-k dielectric block; and forming a conductor in the via. The interconnect structure includes a substrate, a dielectric block, and a conductor. The substrate has an opening therein. The dielectric block is present in the opening of the substrate. The dielectric block has at least one via therein. The dielectric block has a dielectric constant smaller than that of the substrate. The conductor is present in the via of the dielectric block.

An electronic apparatus includes a conductive member and a printed circuit board, wherein the printed circuit board includes a printed wiring board having a signal wiring formed thereon, a first semiconductor device configured to output a digital signal to the signal wiring, and a second semiconductor device configured to input the digital signal output from the first semiconductor device via the signal wiring, wherein the signal wiring has a signal wiring pattern formed on a surficial layer located opposite the conductive member in the printed wiring board, and wherein the conductive member has an aperture formed therein and located opposite the signal wiring pattern or includes a flat plate portion and a recessed portion recessed in a direction more away from the printed wiring board than the flat plate portion.

A printed circuit board includes a plurality of layers including attachment layers and routing layers; first and second signal vias forming a differential signal pair, the first and second signal vias extending through the attachment layers and connecting to respective signal traces on a breakout layer of the routing layers; an antipad of a first type around and between the first and second signal vias in one or more of the attachment layers; and antipads of a second type around the first and second signal vias in at least one routing layer adjacent to the breakout layer.