Laser Marking Machine for PCBs|PCB Laser Marking Character Precision and Corrosion Resistance

In the production of printed circuit boards (PCBs), the precision of laser marking determines the efficiency of product traceability and assembly, while the ability to resist corrosion determines the readability of the marks in harsh environments.The guide is aimed at engineers and procurement personnel, and explains how to adjust the parameters of the laser marking equipment, how to conduct adhesion tests of characters on different types of PCB, and how to optimize the process to satisfy requirements for both precision marking and long-term durability, to help users balance quality control with production costs.

As electronics products have become smaller, the accuracy of laser markings on PCBs has risen from the standard 0.2 mm to 0.1 mm, a trend in the industry.High-precision marking can not only accommodate more component number information, it can also avoid SMT placement errors caused by blurred characters.But while they have been pursuing high precision, many companies have overlooked the need for corrosion resistance. In coastal areas and industrial environments, the loss of characters due to salt corrosion is all too common.

To solve this problem, it is first necessary to understand the relationship between the characteristics of the laser and the material.For example, FR-4 circuit boards are suitable for lasers with a wavelength of 1064nm, while high-frequency boards require adjustments to the pulse frequency to avoid carbonization.Experiments showed that when the laser power was controlled to 8-12 watts and the scan speed was kept at 1200 mm / s, the result was a line width of 0.08 mm and a dense oxide layer on the surface of the characters.This micron-level structural change, which has been verified by a third-party testing organization, can extend the salt spray test from 48 to 96 hours.

In actual practice, it is suggested to use a three-stage verification method. First, use a sample to test the marking effect of different parameter combinations. Then do a cross-hatch adhesion test. Finally, do an accelerated aging experiment in an environment simulating actual application.For example, an automobile electronics manufacturer was able to increase the time that characters would remain on a part in a high-temperature engine compartment from three years to five years through optimizing laser focus depth and auxiliary gas mixtures, and the rate of returns dropped 37 %.

The design of the characters is also important.The smallest lettering is suggested to be no less than 1.2 mm high, and the width of the lines and the space between them should be kept at a ratio of 1: 1.2 or more. In this way, even after many washings, the markings will still be clear.For military-grade PCBs, the company also uses a composite process in which a laser engraving is covered with a transparent protective coating. Although this method increases costs by 15 %, it ensures that the characters will remain intact even under extreme temperature fluctuations between -40 ° C and 125 ° C.

Optimizing the Cost of Laser Marking PCBs

The company offers a laser marking solution for small- and medium-sized electronics manufacturers, and through careful selection of equipment and parameter adjustment, it reduces the costs of equipment investment.The article covers key points such as laser power selection, software compatibility, and maintenance costs, and is suitable for reference by businesses with limited budgets that are seeking stable production.

Case Study: Development of PCB Marking Technology for Humid Environments

Focusing on the issue of corrosion of PCBs in humid environments, it explains the process of development of PCB marking technology with high corrosion resistance.By optimizing new materials and processes, they have solved the problems of traditional labels falling off and becoming blurred. They share their anti-corrosion coating technology, their solutions for improving label accuracy, and case studies, to help electronic devices last longer and maintain stability in humid environments.

PCB Laser Marking: Troubleshooting Common Problems

Is your PCB laser engraver's accuracy not up to standard? This article provides a detailed checklist for troubleshooting, which covers equipment parameter calibration, material compatibility testing, and daily maintenance. It will help you quickly identify common problems such as blurry or offset marks, and improve the efficiency and quality of PCB processing.

Designing Characters for PCBs to Meet ISO Standards

A detailed analysis of PCB character design standards that conform to ISO standards, covering core elements such as character size, position, and clarity.The course explains how to avoid design errors and improve the readability and manufacturability of printed circuit boards through the use of actual cases.It is suitable for reference by hardware engineers, PCB designers and related production personnel to ensure that designs conform to international standards.

Testing the Differences: Laser Marking Results on Different Types of PCBs

The experiment compared the results of laser marking on three common types of PCBs: FR-4, metal, and ceramic. The results were analyzed in terms of character clarity, heat-affected zone, and processing efficiency.The guide provides specific suggestions for setting parameters, helping engineers and production staff select the right PCB materials according to actual needs, and improving product quality and production efficiency.

From Selection to Maintenance: Tips on Choosing a Laser Marking System for PCBs

This article will provide a detailed examination of the key points to consider when selecting, installing, and maintaining laser marking equipment for industrial PCBs.The test covers core factors such as the precision of the equipment, its compatibility with materials, and its stability. It helps users select equipment that offers high performance at a reasonable price. It also provides practical maintenance advice to extend the equipment's life and improve production efficiency.

How to Prevent PCB Characters from Fading

If the characters on a PCB board fall off, it may be impossible to identify the product, or it may be difficult to repair.This article provides five practical methods for enhancing the corrosion resistance of PCB markings, covering material selection, process optimization, and protective techniques. It will help you solve the problems of character blurring and peeling, and extend the lifespan of circuit boards.

A Guide to Laser Marking Parameters for PCBs

The project will explore how to adjust parameters such as laser power, frequency, and speed to ensure the accuracy of the laser marking while increasing the life of the equipment.The book provides practical techniques and is suitable for reference by electronic engineers and PCB production personnel.