Method for layout and wiring of pcb with bga chips mounted thereon and pcb made by applying the method

Abstract

The invention discloses a layout method for a PCB (Printed Circuit Board) mounted with a BGA (Ball Grid Array) chip and a PCB prepared by applying the same and relates to the technical field of an electronic circuit. The layout method comprises the following steps: S1, providing a PCB to be mounted with the BGA chip, wherein the PCB is provided with welding spots corresponding to pins of the BGA chip; S2, confirming the positions of the welding spots on the PCB, which correspond to an NC (Not Component) pin and / or a function nonuse pin; S3, covering the welding spots corresponding to the NC pin and / or the function nonuse pin of the BGA chip with insulation ink; and S4, according to functional requirements, wiring or forming metalized through holes in a coverage region of the insulation ink. The invention solves the technical problem of high layout difficulty of the PCB mounted with the GBA chip in the prior art. According to the invention, the layout difficulty of the PCB mounted with the GBA chip is reduced to the greatest extent and development and processing periods of the PCB mounted with the GBA chip are shortened.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a PCB layout and wiring method mounted with BGA chips and a PCB prepared by applying the method. Background technique [0002] BGA (Ball Grid Array) is a packaging method for integrated circuits using organic substrates. BGA chips are chips that are packaged in BGA. The pins are not distributed around the chip, but on the bottom of the package. Compared with chips packaged in QFP (Plastic Quad Flat Package), more packaging capacity can be maintained under the same package size. At present, BGA chips are widely used in highly integrated electronic products, such as north and south bridge chips of computer motherboards, high-end graphics chips, and even some chips of printers and hard disks. [0003] With the development of science and technology, the volume of electronic equipment is constantly shrinking, and the PCB (Printed Circuit Board) in electronic equipment is ...

AI Technical Summary

Problems solved by technology

However, the number of pins of the BGA chip is large, and most of them are distributed in the bottom of the chip in the form of an array, and the distribution density is high, which increases the difficulty of PCB layout and wiring (layout) for mounting the BGA chip, making the mounting of the BGA chip difficult. The PCB will consume a lot of time whether it is in the design stage or the processing stage, which will increase the development cycle and production cycle of electronic equipment.

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