Enhancing cleanliness in PCB clean rooms through optimized airflow organization can be approached from the following key aspects: 1. Reasonable Planning of Airflow Direction and Area Division Unidirectional or Mixed Flow Mode: Implementing vertical unidirectional flow or horizontal unidirectional flow modes allows clean air to flow from clean areas to contaminated areas, carrying pollutants out … Read more
During visual inspection (non-sectioning), voids in the copper layer and coating layer of the hole (void) are common defects. Voids identified during visual inspection refer to areas exposing the substrate material, while voids identified through section analysis refer to areas below the minimum thickness specification, indicating a fundamental difference between the two. Different grades of … Read more
The circuit board manufacturing industry is shifting from “scale-driven” to “technology-driven,” with high density, high frequency, high speed, flexibility, intelligence, and environmental sustainability as core directions. In the manufacturing and assembly process of PCBs (Printed Circuit Boards), the cleaning stage is one of the core steps to ensure product quality and performance stability. As circuit … Read more
In 2024,the AI large model drives an explosion in the server market, benefiting not only NVIDIA and Inspur, but also high-end circuit board companies that serve as the “neural hubs” for servers, are quietly entering a spotlight moment. Today, we will deeply explore Guanghe Technology (001389), which has a small market value but excellent fundamentals. … Read more
Is it possible not to place silkscreen position numbers on a PCB? The silkscreen position number is mainly for convenience during manual soldering or prototype debugging stages, as it visually indicates the component positions, facilitating assembly, maintenance, and testing, primarily used in the prototype phase. It is indeed possible to manage without position numbers when … Read more
1. Determine the Scheme and Purpose Hello everyone, today I will introduce the LHA7668 chip from the F4 series development board, which is a domestic, 24-bit, 8-channel differential, and 16-channel single-ended high-precision low-power ADC chip. The goal is to design a circuit board to meet the requirements for 16-channel single-ended acquisition or 8-channel differential acquisition.The … Read more
Click the blue textFollow us As Tesla’s Robotaxi is about to hit the road and your smartphone AI assistant becomes increasingly “intelligent”, the circuit boards behind them are undergoing a technological revolution. Since 2025, the PCB industry has welcomed multiple favorable developments, from AI data centers to new energy vehicles, from foldable phones to robots, … Read more
Introduction Since 2020, Anji has held annual city promotion conferences in Shanghai to promote the city brand and attract investment, signing a large number of quality projects at these events. On the eve of this year’s Shanghai city promotion conference, Anji announced that it would select a batch of projects and companies that have signed … Read more
[Conclusion] General IO cannot be directly used as a clock input for PLL; dedicated clock pins can be used instead. General IO can be connected to the PLL clock input through a BUFG, but the PLL settings must be modified to select “No Buffer” for the input clock option. The specific internal layout can be … Read more
Edge AI,GenAI and next-generation communications are adding more workloads to smartphones, which are already under pressure to deliver high performance with low power consumption. Leading smartphone vendors are striving to keep up with the growing computational and power demands driven by localized generative AI, standard smartphone functionalities, and the need to move more data back … Read more