A circuit board has: an insulating substrate formed by plural ceramic insulating layers being layered on one another and having a first surface and a second surface on the opposite side to the first surface; a circuit conductor passing through the inside of the insulating substrate and positioned in a region from the first surface to the second surface; and at least one heating wire positioned in the insulating substrate. The heating wire is positioned in, among plural interlayer regions between the ceramic insulating layers, at least one interlayer region between the ceramic insulating layers and has a mesh shape having plural first through holes through which a portion of the circuit conductor passes and having plural second through holes through which the circuit conductor does not pass.

A circuit design includes a flexible film, an electrode pattern, and a connecting circuit. The flexible film has a visible area and a bending area and includes an external conductive connection. The electrode pattern is disposed in the visible area of the flexible film. The connecting circuit is electrically connected to the electrode pattern and disposed in the bending area of the flexible film. The bending area has a first portion and a second portion. The first portion is located between the visible area and the second portion. A width of one end of the second portion connected to the first portion is smaller than a width of the first portion. The external conductive connection is electrically connected to the connecting circuit and located at another end of the second portion.

A conductive component includes a first electrode pattern made of metal thin wires, and includes a plurality of first conductive patterns that extend in a first direction alternating with first non-conductive patterns. Each first conductive pattern includes break parts in portions other than intersection parts of the thin metal wires. The conductive component further includes a second electrode pattern made of thin metal wires, and includes a plurality of second conductive patterns that extend in a second direction orthogonal to the first direction and alternating with second non-conductive patterns. Each second conductive pattern includes break parts in portions other than intersection parts of thin metal wires.

A display device includes a display panel, a data driver which transmits a data voltage to the display panel, a first flexible printed circuit board attached to the display panel and including an input side wiring electrically connected to the data driver, a first printed circuit board (PCB) electrically connected to the input side wiring to transmit a high-speed driving signal to the data driver, and a metal tape overlapping the input side wiring in a plan view and attached on the first flexible printed circuit board, where a part of the metal tape overlapping the input side wiring in the plan view defines an opening.

A printed circuit board and a terminal are provided. The printed circuit board includes a feedpoint arrangement region, a ground point arrangement region, and a ground region. The ground region is adjacent to and connected to the ground point arrangement region and is configured to be a ground plate of the antenna. A radiation reduction structure is arranged in the ground region and defines an opening. Therefore, an edge of the printed circuit board is disrupted by the opening.

A conductive component includes a first electrode pattern made of metal thin wires, and includes a plurality of first conductive patterns that extend in a first direction alternating with first non-conductive patterns. Each first conductive pattern includes break parts in portions other than intersection parts of the thin metal wires, The conductive component further includes a second electrode pattern made of thin metal wires, and includes a plurality of second conductive patterns that extend in a second direction orthogonal to the first direction and alternating with second non-conductive patterns. Each second conductive pattern includes break parts in portions other than intersection parts of thin metal wires.

A transparent antenna includes a substrate, an antenna grid layer, and a ground grid layer. The substrate has an electrically conductive hole extending from two opposite surfaced of the substrate. The antenna grid layer is formed on a surface of the substrate. The antenna grid layer includes a feeding portion and a transmission portion. The ground grid layer is formed on another surface of the substrate. The ground grid layer is coupled to the feeding portion of the antenna grid layer via the electrically conductive hole. An offset distance between a projection of a gridline of the antenna grid layer on the first surface and a projection of a gridline of the ground grid layer on the first surface is smaller than or equal to half of a difference between a line width of the antenna grid layer and a line width of the ground grid layer.

A flexible wiring board includes a signal line and a conductive portion that overlaps the signal line in plan view. The conductive portion includes a first line portion extending in a first direction and having a first part and a second part, a second line portion extending in a second direction and having a third part and a fourth part, and a third line portion. The third line portion has a line width smaller than a line width of the first part and a line width of the second part, is connected to the first and second parts, and is provided between the first part and the second part. The conductive portion includes a fourth line portion that is connected to the third part and the fourth part and that is provided between the third part and the fourth part. The third line portion and the fourth line portion intersect.

A display device includes a display panel, a data driver which transmits a data voltage to the display panel, a first flexible printed circuit board attached to the display panel and including an input side wiring electrically connected to the data driver, a first printed circuit board (PCB) electrically connected to the input side wiring to transmit a high-speed driving signal to the data driver, and a metal tape overlapping the input side wiring in a plan view and attached on the first flexible printed circuit board, where a part of the metal tape overlapping the input side wiring in the plan view defines an opening.

A wiring board (10) includes a substrate (11) and a mesh wiring layer (20) disposed on the substrate (11) and including a plurality of wiring lines (21, 22). The substrate (11) has a transmittance of 85% or more for light with a wavelength of 400 nm or more and 700 nm or less. The wiring lines (21, 22) have a surface roughness Ra, and the surface roughness Ra is 100 nm or less.