Resistor built-in printing circuit board and manufacturing process thereof

Abstract

The invention discloses a resistor built-in printing circuit board and a manufacturing process thereof. A sprayed resistive layer which replaces a resistor on the surface of the circuit board is formed by the processes of shearing, circuit spraying, drilling, copper deposition perforation, electroplating and green oil spraying in turn; and the structure of a finished product comprises an insulation substrate, a metal circuit layer and an interlayer through hole, wherein the surface of the part, exposed from the metal circuit layer, of the insulation substrate is covered with an insulation printing ink layer; at least one pair of electrodes are formed in the metal circuit layer; the insulation substrate between each pair of electrodes is covered with the resistive layer; and each resistive layer extends to cover one of the two ends, which is close to the resistive layer, of the electrode. The product is wide in use; and a built-in resistor shortens the path of a signal to each element, reduces stray inductance, the crosstalk of the signal, the size of the circuit board, the weight of the product and welding spots on the circuit board, so that the product has the characteristics of precision, smallness, light weight and reliable signal and is suitable for requirement trends of the electronic products.

Description

technical field [0001] The invention relates to the field of printed circuit boards, in particular to a printed circuit board with embedded resistors and a manufacturing process thereof. Background technique [0002] Electronic products tend to be miniaturized and multi-functional, and electronic products in the field of resistance must not only meet this requirement, but more importantly, must meet the combined signal transmission effect of components and good functions. [0003] Resistor plate products are mostly separated component combinations. There are many components in the product, wires are involved, the volume is large, and the combined signal conversion effect of components is poor. Contents of the invention [0004] In order to overcome the above defects, the present invention provides a printed circuit board with embedded resistors and its manufacturing process, which can realize embedded resistors with small volume and high integration. [0005] The technica...

AI Technical Summary

Problems solved by technology

[0003] Resistor plate products are mostly separated component combinations. There are many components in the product, wires are involved, the volume is large, and the combined signal conversion effect of components is poor.

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