A wet chemical etching simulation-based Flexible PCB etching process online regulation and control method

Abstract

The invention discloses a wet chemical etching simulation-based flexible PCB etching process online regulation and control method, which comprises the following steps: constructing a flexible PCB equivalent two-dimensional geometric model by utilizing multi-physics field finite element simulation software, establishing a multi-physics field simulation model, finishing setting material attributes, boundary conditions and initial conditions, and performing simulation. By taking process parameter data possibly appearing in various production lines as simulation boundary conditions, various process parameter data possibly permutated and combined as simulation parameter data are input into a simulation system and subjected to simulation calculation, and a database in which the simulation parameter data and simulation results are in one-to-one correspondence is obtained. Then the production line data collected in real time is matched with the simulation parameter data in the database, a corresponding simulation result is called, and if the simulation result exceeds a product index, production is stopped, and process data is regulated and controlled, so that early production line process problems are monitored, and online adjustment of process parameters is completed.

Description

technical field [0001] The invention belongs to the field of optoelectronics, and relates to a PCB board production process technology, in particular to an online regulation method for flexible PCB board etching process based on wet chemical etching simulation. Background technique [0002] Flexible PCB board is a printed circuit board made of flexible substrates, which has the characteristics of high reliability and excellent flexibility. At present, flexible PCB boards have been widely used in terminal consumption fields such as smartphones, automobiles, and wearable devices. With the rapid development of high integration and high precision of internal components such as personal computers and smartphones in recent years, as electrical components The flexible PCB board of the device connector will also accelerate the pace of high density. The production process of flexible PCB boards is generally: I-type punching→coating→exposure→developing→etching→removing film→tinning→a...

AI Technical Summary

Problems solved by technology

However, if a certain etching process parameter is wrong, and then the AOI system detects a circuit quality problem, the circuit boards produced in this batch will not be usable, which will cause the scrapping of semi-finished products and increase the processing cost, which will undoubtedly cause damage to the enterprise. Additional losses that significantly reduce the profit margin of the business

The current AOI inspection method is to carry out quality inspection after the etching process is completed, which has a certain lag. This method is effective for improving product quality, but it is difficult to monitor the process problems of the earlier production line

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