A keyboard module including keys, a frame, a bottom plate, and a backlight assembly is provided. The frame has a key region. Top surfaces of the keys are exposed in the key region. The frame includes a column. The bottom plate is disposed under the frame. The bottom plate includes a bending portion. The backlight assembly is disposed under the bottom plate, and sequentially includes a light shielding sheet, a light guide plate, and a reflector. The light shielding sheet has a first opening. The light guide plate has a second opening. A part of the reflector is exposed by the first opening and the second opening. The column passes through the bending portion and is located in the first opening and the second opening. A bottom surface of the column leans against the reflector.

An apparatus includes a substrate and an electronic circuit comprising a plurality of conductive tracts forming a printed litz line on the substrate for distributing a signal therebetween in order to increase effective conductance relative to a single conductive line not divided into tracts. The plurality of conductive tracts may be formed by printing a pattern on the substrate and removing portions of the pattern to leave the plurality of conductive tracts. The removing portions of the pattern may be performed by a removal process such as laser cutting, milling, etching, or masking. For example, the removal may be performed by applying ultrashort laser pulses. The printing may be performed by a jetting process, a spray process, an extrusion process, a dispensing process, and/or other types of processes for applying materials.

The invention relates to an electronic board (1) comprising: a printed circuit (2) having a connection face (3) defining a plane (X, Y) comprising at least one transfer area (4), an electronic component (5) comprising at least one contact terminal (6), each contact terminal (6) being brazed or sintered on an associated transfer area (4) by means of a brazing joint or of a sintering joint (7), the electronic board being characterised in that an orthogonal projection of the contact terminal (6) of the electronic component (5) on the connection face (3) of the printed circuit does not overlap the associated area (4).

The present disclosure describes expansion card interfaces for a printed circuit board and methods of making the same. The methods include forming electrical pads of the expansion card interface on a substrate, and dividing at least one electrical pad into a first portion and a second portion. The resulting expansion card interfaces have the first portion conductively coupled to a circuit on the printed circuit board, and the second portion conductively isolated from the first portion.

According to one embodiment, a detection device includes a substrate, detection electrode, terminal formed of a metal material, lead, coating layer, conductive adhesion layer, and circuit board. The lead connects the electrode and the terminal. The coating layer covers the electrode and the lead, and partly covers the terminal. The adhesion layer covers a part of the terminal exposed from the coating layer and covers a part of the coating layer. The circuit board is connected to the terminal with the adhesion layer interposed therebetween. At least in an overlapping area where the adhesion layer covers the coating layer, an area of the metal material per unit area is smaller than that of the other area of the terminal.

A circuit board is a circuit board on which a predetermined circuit unit that causes heat and electromagnetic noise is disposed, and which is to be fixed to a conductive housing with a conductive screw. The circuit board includes: an insulator layer including an insulating plate-shaped base material; a conductor layer having a circuit pattern including a ground portion, which is disposed on at least one surface of the insulator layer; and a screw insertion hole that penetrates the insulator layer and the ground portion, and through which the conductive screw is to be inserted. The ground portion has a slit disposed between the screw insertion hole and the predetermined circuit unit. The ground portion has a ground bridge that electrically connects a portion of the ground portion between the slit and the screw insertion hole and a portion of the ground portion between the slit and the predetermined circuit unit.

A printed circuit board for mounting on a support member, the printed circuit board including: a plurality of mounted portions for mounting the printed circuit board on the support member; a ground pattern configured to be electrically connected to the support member through the plurality of mounted portions; and a slit extended from a first mounted portion to a second mounted portion of the plurality of mounted portions and between a first portion, in which an electronic device is provided, of the ground pattern and a second portion, in which an electronic device is not provided, of the ground pattern.

A power supply apparatus includes: a detection circuit configured to feed back a voltage to a generation circuit. The detection circuit includes: a first resistor, a second resistor connected in series with the first resistor, a first conductive pattern configured to connect the first resistor and the second resistor in series, a first capacitor connected in parallel to the first resistor, a second capacitor connected in parallel to the second resistor and connected in series with the first capacitor, a second conductive pattern configured to connect the first capacitor and the second capacitor in series, and a third conductive pattern configured to electrically connect the first conductive pattern and the second conductive pattern. A thermal resistance of the third conductive pattern is greater than a thermal resistance of the first conductive pattern.

Provided is a key structure including a base plate having at least one connecting seat and at least one notch adjacent to a lower portion of the connecting seat; a keycap disposed above the base plate in a liftable manner; a thin film circuit assembly disposed on the base plate and located between the base plate and the keycap; and a supporting rod connected to the keycap and the base plate and located between the thin film circuit assembly and the keycap. An accommodating space formed by the notch extends from and communicates with a through hole of the connecting seat. The connecting seat protrudes out from an opening of the thin film circuit assembly. A vertical projection region of the notch on the base plate is located within a vertical projection region of the opening on the base plate. The invention also provides a keyboard module.

A keyboard module including keys, a frame, a bottom plate, and a backlight assembly is provided. The frame has a key region. Top surfaces of the keys are exposed in the key region. The frame includes a column. The bottom plate is disposed under the frame. The bottom plate includes a bending portion. The backlight assembly is disposed under the bottom plate, and sequentially includes a light shielding sheet, a light guide plate, and a reflector. The light shielding sheet has a first opening. The light guide plate has a second opening. A part of the reflector is exposed by the first opening and the second opening. The column passes through the bending portion and is located in the first opening and the second opening. A bottom surface of the column leans against the reflector.