Circuit boards and their applications

Abstract

The invention relates to a circuit board and application thereof. The circuit board comprises a substrate and an etching metal circuit located over the substrate. The substrate is provided with at least one pair of through holes, inside of the through holes and substrate base between the two through holes are provided with a conductive coating, and the substrate and the etching metal circuit form a conducted closed loop. According to the circuit board provided by the invention, the etching metal circuit is arranged over the substrate to replace the conventional circuit formed by printing silver circuits on the substrate, conductive circuits are compactly concentrated on a metal layer, probability of generating defective circuits while printing is reduced, and yield is increased; and the substrate is drilled, the inside of the through holes and the substrate base are provided with the conductive coating, the formed conducted closed loop can replace the existing jumper technology, production processes can be decreased, difficulty in process is reduced, and production cost is saved greatly. Application of the circuit board provided by the invention comprises using the circuit board as a light guide plate of an illuminant keyboard, and just by directly using the circuit board in cooperation with a light-emitting diode, light emitting at base of the keyboard can be realized.

Description

technical field [0001] The invention relates to a circuit board and its application, in particular to a circuit board and its application through etching a metal circuit and a metal coating, and belongs to the field of electronic technology. Background technique [0002] Traditional circuit boards are generally made by printing silver wires on the surface of the substrate. The defect rate of printed silver wires is very high, the production process is complicated, and the waterproof ability of the circuit boards is poor, and the cost is high; at the same time, the traditional The circuit board forms a jumper by bridging the surface of the silver wire circuit, which is prone to short circuits and the like. Contents of the invention [0003] Purpose of the invention: the first purpose of the present invention is to provide a circuit board, and the second purpose of the present invention is to provide an application of the circuit board as a light guide plate for a luminous k...

AI Technical Summary

Problems solved by technology

[0002] Traditional circuit boards are generally made by printing silver wires on the surface of the substrate. The defect rate of printed silver wires is very high, the production process is complicated, and the waterproof ability of the circuit boards is poor, and the cost is high; at the same time, the traditional The circuit board forms a jumper by bridging the surface of the silver wire circuit, which is prone to short circuits and other phenomena

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