domestic pcb manufacturer-Shenzhen Chengchi Circuit Technology Co., Ltd.

Core Formulas and Basic Parameters for Impedance Calculation of 4-Layer PCBs

In the design of high-speed circuits, RF, communications, and precision industrial control products, impedance control in 4-layer PCBs is a core factor determining signal integrity. As electronic products trend toward higher frequencies, smaller sizes, and faster speeds, relying solely on empirical

Jun 10, 2026 93

Detail

Top 10 Beginner Mistakes in PCB Design

Drawing a PCB isn't hard to get into, but it’s incredibly easy to make mistakes. Many people feel like they’ve mastered board design once they can import a schematic and generate Gerber files. But then the boards come back from fabrication—some whistling with noise, others suffering from interferenc

Jun 09, 2026 376

Detail

Multilayer PCB Power Integrity Design

Multilayer PCBs are widely used today in high-speed digital circuits, high-performance computing, communication base stations, automotive electronics, and aerospace applications. Power Integrity (PI) design is a core factor determining whether a multilayer PCB can operate stably and reliably. The es

Jun 06, 2026 138

Detail

Manufacturing Process Flow for 4-Layer PCBs

As one of the most widely used multilayer boards in electronic products today, the manufacturing process of 4-layer PCBs is significantly more complex than that of single-sided or double-sided boards. However, compared to high-layer-count boards (6 layers and above), they offer excellent cost-perfor

Jun 05, 2026 381

Detail

Active and Passive Cooling Implementation Design for CEM-1 PCBs in Sealed Enclosures

Small appliances, sealed adapters, and embedded control modules commonly utilize fully enclosed plastic housings with no internal air convection. In such environments, the inherently poor thermal conductivity of CEM-1 substrates is exacerbated, leading to heat accumulation within the confined cavity

Jun 04, 2026 469