Abstract: A circuit board with improved heat dissipation function and a method for manufacturing the circuit board are provided. The method includes providing a first metal layer defining a first slot; forming a first adhesive layer in the first slot; electroplating copper on each first pillar to form a first heat conducting portion; forming a first insulating layer on the first adhesive layer having the first heat conducting portion, and defining a first blind hole in the first insulating layer; filling the first blind hole with thermoelectric separation metal to form a second heat conducting portion; forming a first wiring layer on the first insulating layer; forming a second insulating layer on the first wiring layer, defining a second blind hole on the second insulating layer; electroplating copper in the second blind hole to form a third heat conducting portion; mounting an electronic component on the second insulating layer.

Abstract: A circuit board (100) includes an insulating base layer (11), a first conductive circuit layer (40) disposed on the base layer (11); a solder mask layer (60) covering the first conductive circuit layer (40) away from the base layer (11), wherein the solder mask layer (60) defines a slot (601), the slot (601) exposes a portion of the first conductive circuit layer (40), the solder mask layer (60) includes a sidewall (602) at the slot (601); and a cover film (70) covering the solder mask layer (60), wherein the cover film (70) defines an opening (701), the opening (701) corresponds to the slot (601) and exposes the solder pad (7401), the cover film (70) includes a covering portion (74) and a side reflecting portion (75), the covering portion (74) is disposed on the solder mask layer (60), the side reflecting portion (75) is connected to the covering portion (74) and covers the sidewall (602).

Abstract: A circuit board (100) includes an insulating base layer (11), a first conductive circuit layer (40) disposed on the base layer (11); a solder mask layer (60) covering the first conductive circuit layer (40) away from the base layer (11), wherein the solder mask layer (60) defines a slot (601), the slot (601) exposes a portion of the first conductive circuit layer (40), the solder mask layer (60) includes a sidewall (602) at the slot (601); and a cover film (70) covering the solder mask layer (60), wherein the cover film (70) defines an opening (701), the opening (701) corresponds to the slot (601) and exposes the solder pad (7401), the cover film (70) includes a covering portion (74) and a side reflecting portion (75), the covering portion (74) is disposed on the solder mask layer (60), the side reflecting portion (75) is connected to the covering portion (74) and covers the sidewall (602).

Abstract: A high-frequency circuit board includes a first circuit structure, a second circuit structure, and a dielectric layer formed on the second circuit structure. The first circuit structure includes a first substrate layer and at least one first circuit layer. The at least one first circuit layer is formed on at least one surface of the first substrate layer. At least one receiving cavity is defined in the first substrate layer. A second circuit structure is embedded in the receiving cavity. The second circuit structure includes a second substrate layer, at least one second circuit layer embedded in the second substrate layer, and a plurality of support columns formed on the second substrate layer. A portion of the dielectric layer is filled into gaps between an inner wall of the receiving cavity and the second circuit structure. The support columns are embedded in the dielectric layer.

Abstract: In a method for manufacturing a printed circuit board, a substrate, including a number of plated through holes (PTHs) is provided. Each of the PTHs has an electrically conductive layer plated on its inner wall and includes an electrically connecting portion and a stub. A protective layer is formed on a surface of the substrate adjacent to the stub. An etching device, including an upper plate and a number of spray tubes corresponding to the PTHs, is provided. Each of the spray tubes includes a protruding portion beyond the upper plate. The substrate is arranged in such a manner that the protective layer is in contact with the upper plate and the protruding portions are received in the stubs. After that, the protruding portions spray an etchant to etch and remove the electrically conductive layer of the stubs, and the protective layer is removed.

Abstract: A computer obtains user input from an input to control a cutter and a conveyor to cut a substrate. The control module of the computer calculates a total number of cuts of the substrate and a distance that the substrate moves before each cut of the substrate according to user input. A conveyer control module of the computer controls the conveyer to move the substrate, where a reminder signal is sent out after the substrate has moved the distance. A cutter control module of the computer controls the cutter to cut the substrate.

Abstract: A printed circuit board includes an inner substrate, a stuffing layer, an adhesive layer and a plurality of second copper trace layer. The inner substrate includes an insulating layer and an copper trace layer formed on a surface of the insulating layer. The first surface includes a low copper density region. In the low copper density region, the area of first surface covered by the copper trace layer is less than 60 percent of the area of the low copper density region. The stuffing layer is only formed on the first inner substrate in the region. The present disclosure also provides a method for manufacturing the printed circuit board.

Abstract: In a method for manufacturing a printed circuit board, a substrate, including a number of plated through holes (PTHs) is provided. Each of the PTHs has an electrically conductive layer plated on its inner wall and includes an electrically connecting portion and a stub. A protective layer is formed on a surface of the substrate adjacent to the stub. An etching device, including an upper plate and a number of spray tubes corresponding to the PTHs, is provided. Each of the spray tubes includes a protruding portion beyond the upper plate. The substrate is arranged in such a manner that the protective layer is in contact with the upper plate and the protruding portions are received in the stubs. After that, the protruding portions spray an etchant to etch and remove the electrically conductive layer of the stubs, and the protective layer is removed.

Abstract: A computer obtains user input from an input to control a cutter and a conveyor to cut a substrate. The control module of the computer calculates a total number of cuts of the substrate and a distance that the substrate moves before each cut of the substrate according to user input. A conveyer control module of the computer controls the conveyer to move the substrate, where a reminder signal is sent out after the substrate has moved the distance. A cutter control module of the computer controls the cutter to cut the substrate.

Abstract: An exemplary apparatus for wet processing a substrate includes a wet processing system and a water supplying system. The wet processing system includes a preliminary rinsing device, a final rinsing device, and a conveyor. The preliminary rinsing device includes a first tank and a first spraying system above the first tank. The final rinsing device includes a second tank and a second spraying system above the second tank. The conveyor is configured for conveying a substrate from the preliminary rinsing device to the final rinsing device. The water supplying system includes a supply pipe configured for supplying water to the second spraying system, a connecting system communicating the second tank and the first spraying system, and a drain pipe communicating with the first tank.

Abstract: A method for manufacturing printed circuit board includes steps below. A first electrically conductive layer including a first surface and a second surface at an opposite side thereof to the first surface is provided. A number of first traces directly formed on the second surface. A first insulating layer is formed on the second surface of the first electrically conductive layer and the surface of the first traces. The electrically conductive layer is etched to form a number of second traces, the second traces superpose the first traces, the first traces and the second traces constitute a circuit pattern.

Abstract: A printed circuit board includes a composite layer, a first electrically conductive pattern, and a second electrically conductive pattern. The composite layer includes a polymer matrix and an electrically conductive pin embedded therein. The polymer matrix has a first surface and an opposite second surface. The pin includes a catalyst block and a carbon nanotube bundle grown on the catalyst block. The catalyst block is exposed at the first surface, and the carbon nanotube bundle is exposed at the second surface. The first pattern is formed on the first surface, and includes a first electrical contact, which is electrically coupled to the catalyst block. The second pattern is formed on the second surface, and includes a second electrical contact, which is electrically coupled to the carbon nanotube bundle.

Abstract: An apparatus for cutting foil strip from a spool includes a holding device, a pulling unit, a cutting unit, a brake unit, a detection unit, and a controller. The supporting is configured for receiving the spool. The pulling unit, the cutting unit, the brake unit are fixed on the holding device. The pulling unit is configured for pulling the foil apart from the spool to the cutting unit. The cutting unit is configured for cutting the foil into pieces. The brake unit is mechanically coupled to the reel and configured for applying a resistance to the spool. The detection unit is mechanically connected with to the reel and configured for sensing the rotation number of the spool. The controller is electronically connected to the sensor and the brake unit and configured for controlling the resistance the brake unit applying to the spool according signal of the detection unit.