An electro-optical apparatus includes an electro-optical panel having a first end portion, a first connector that is flexible, and a reinforcement member on the first connector. The first connector has a second end portion and a third end portion opposite to the second end portion. The second end portion is connected to the first end portion. The first connector has a first surface connected to the electro-optical panel, and a second surface opposite to the first surface. The reinforcement member is located on the first surface, and extends from an end surface at the first end portion of the electro-optical panel to the third end portion. The first connector has first and second side edges, at least one of which has a first cutout depressed inward. The first and second side edges connect the second and third end portions to each other.

A manufacturing method of a display device includes providing a display panel including: a first area in which a plurality of pixels is arranged, a second area adjacent to the first area and at which the display panel is bendable, and a third area facing the first area with the second area therebetween; providing a circuit board electrically connected to the display panel at the third area; providing a first force to the third area of the display panel; and bending the second area of the display panel by the first force which is provided to the third area of the display panel.

A cable substrate includes an insulating layer, a slit portion penetrating through at least a portion of the insulating layer in a thickness direction of the insulating layer, and a dummy pattern disposed on the insulating layer. At least a portion of the dummy pattern is exposed to the slit portion.

A solder composition contains: a flux composition containing an (A) rosin resin, a (B) activator, a (C) thixotropic agent, and a (D) solvent; and (E) solder powder, in which the (B) component contains a (B1) dicarboxylic acid having 3 to 8 carbon atoms, the (C) component contains at least one selected from the group consisting of a (C1) amide thixotropic agent having a hydroxy group in one molecule and a (C2) glycerol thixotropic agent having a hydroxy group in one molecule, and the solder composition satisfies a condition represented by Numerical Formula (F1) below provided that a total of contents of the (C1) component and the (C2) component is defined as X and a content of the (B1) component is defined as Y,

[00001]$\text{X}\text{}/\text{}2\le \text{Y}\le 5\text{X}$

A microphone includes a base, at least one sound receiving element, and a flexible circuit board. The base has a plurality of supporting portions, a plurality of damping portions, and a bearing portion. The plurality of supporting portions are spaced apart from each other. Each of the plurality of damping portions is disposed on an inner surface of the corresponding supporting portion. The bearing portion is connected to the plurality of damping portions and is suspended between the plurality of supporting portions. The at least one sound receiving element is disposed on the base. The flexible circuit board is disposed on the base and has a first transmission segment. The first transmission segment is electrically coupled to the at least one sound receiving element, and the first transmission segment has a plurality of bending sections.

A circuit board includes a first wiring board, a second wiring board connected to the first wiring board, a third wiring board connected to the first wiring board, a connector, and an external terminal connector. A different-direction reference portion of the third wiring board extends in a direction different from an extending direction of a reference portion of the second wiring board between a first end of the third wiring board and a second end of the third wiring board. The connector electrically connects any portion between the reference portion and the second end of the second wiring board and any portion between the different-direction reference portion and the second end of the third wiring board.

Provided are a display device and a manufacturing method thereof. The display device includes a display assembly, an antenna, and a feed circuit board. At least part of the antenna is disposed on the side of the light emission surface of the display assembly. The antenna includes a radiator and a first feed structure connected to the radiator. The feed circuit board is disposed on the side of the display assembly facing away from the light emission surface. The feed circuit board includes a power division network and a second feed structure connected to the power division network. The first feed structure at least partially overlaps the second feed structure along the thickness direction of the display assembly.

A strain gauge includes: a flexible substrate; a resistor formed on one side of the substrate; a pair of terminal parts electrically connected to both ends of the resistor; and a plurality of resistance value tuning wires configured to tune the resistance value between the pair of terminal parts. In this strain gauge, the plan shape of the resistor is a spiral shape formed by two linear resistance wires about the halfway part of the two linear resistance wires, the two linear resistance wires being a predetermined space apart from each other and extending in the same direction from the halfway part, and the resistance value tuning wires are arranged discretely so as to bridge between the two linear resistance wires.

A flexible circuit member, a preparation method thereof, and a battery apparatus are provided. The flexible circuit member includes an extension unit having a first body portion, a second body portion, and a stacking portion connected between the first and second body portions. The stacking portion has at least two layers due to the folding processing. A first end of the extension unit in a long-axis direction is an end portion of the first body portion that is not connected to the stacking portion. A second end of the extension unit in the long-axis direction is an end portion of the second body portion that is not connected to the stacking portion. A conductive wire harness for electrical signal transmission extends from the first end to the second end. After the stacking portion is unfolded, a distance between the first and second ends in the long-axis direction decreases.

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.