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The PCB ground (GND) and metal chassis (EGND) are connected via a resistor-capacitor combination (typically a 1MΩ resistor in parallel with a 1-100nF capacitor) to suppress high-frequency noise, provide electrostatic protection, isolate power frequencies, and optimize EMC.

HDI PCBs are a core technology for the miniaturization of modern electronic devices, and their laminate structure design directly determines product performance and reliability. From simple single-layer lamination (1+4+1) to complex double-layer lamination (1+1+4+1+1), key design considerations are provided to achieve the optimal balance between space constraints, signal integrity, and manufacturing costs.

A complete set of equipment covering the entire process from substrate cutting, inner layer circuit production, multilayer board lamination, precision drilling, electroplating, outer layer circuit production, solder mask printing, to final testing. High-tech PCB-specific equipment is the technical foundation for the complexity and precision of circuit board manufacturing.

Double-sided PCB reflow soldering is a core process in electronics manufacturing, involving the selection of solder paste and red glue processes, temperature curve control, and dual-sided soldering strategies. This article analyzes the soldering process for double-sided PCBs, provides solutions to common issues, and offers tips for process optimization to improve soldering yield and production efficiency.

PCB copper foil thickness standards (35μm-210μm), including IPC-2152 current-carrying capacity formulas, signal integrity impact, thermal management solutions, and copper thickness selection strategies for typical applications such as consumer electronics, automotive electronics, and high-power equipment.

PCB shape design directly affects the mechanical strength, signal integrity, and production cost of circuit boards. Excellent PCB shape design requires balancing functional requirements with process limitations, considering multiple factors such as trace angles, edge treatment, and material selection.