Quality tracing method for multi-layer PCB

Abstract

The invention relates to the field of PCBs, and discloses a quality tracing method for a multi-layer PCB. The quality tracing method comprises the steps of distributing a unique two-dimensional code for each core board in a board cutting procedure, converting each two-dimensional code into a unique hole array code and then drilling the unique array code on the corresponding core board; reading thehole array code on each core board in a laminating procedure, combining all of the read hole array codes into a corresponding unique two-dimensional code, then converting the two-dimensional code into a unique hole array code, and drilling the unique hole array code on a laminated multi-layer board; and reading the hole array code on the multi-layer board after a resistance welding procedure, converting the hole array code into a corresponding two-dimensional code, and marking the two-dimensional code on the multi-layer board. The embodiment of the invention can ensure accurate recognition ofa tracing identifier in each procedure in the manufacturing process of the multi-layer PCB, thereby laying a foundation for realizing whole-process quality monitoring for products; and the transfer of information from an inner layer to an outer layer is realized in the laminating procedure, thereby preventing the loss of the information in the inner layer, and being capable of realizing whole-life-cycle tracing for the products.

Description

technical field [0001] The invention relates to the technical field of PCB (Printed Circuit Board, printed circuit board), in particular to a quality traceability method of a multilayer PCB. Background technique [0002] Traceability of the cause of product problems is a serious challenge for manufacturers in every industry, from automotive to aerospace, from medical to food. In an era of globalization, businesses pursue relationship management to maximize customer satisfaction. Consumer and environmental regulations are becoming stricter, making traceability even more necessary. [0003] More than ever, manufacturers are looking to maximize production capacity and reduce costs. To achieve this goal, every step in the entire manufacturing process must be monitored and complete historical records kept. Issues affecting product quality must be quickly identified and corrected to prevent defective products from continuing down the production line, with the ultimate goal of a...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a quality traceability method for multi-layer PCBs, which overcomes the defects that the existing data is easily lost and the identification is easily affected by the use of two-dimensional codes as traceability marks in the prior art.

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