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

Low Output Voltage in Power Modules

**Series 1: A Systematic Framework for Troubleshooting Low Output Voltage in Power Modules**In electronic devices, industrial control motherboards, communication equipment, automotive electronics, and consumer products, low output voltage in power modules is a highly prevalent failure with a wide im

Feb 28, 2026 1

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Detailed Q&A on Inner Layer Browning/Black Oxide Defects in PCBs

**Q1: What is browning used for? What's its relationship with bubbles?****A:** Browning is used to create a micro-roughness + passivation on the inner layer copper surface, allowing the prepreg (PP) resin to firmly "grip" the board. Poor roughening → Poor wettability → Resin cannot spread → Air cann

Feb 27, 2026 1

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Six-Layer PCB Impedance and Final Product Inspection Standards

Six-layer boards are widely used in high-speed signal transmission, differential signal applications, and high-frequency circuits. Impedance control and electrical performance are mandatory inspection items. This article explains industry-standard specifications for impedance, electrical testing, hi

Feb 26, 2026 1

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PCB layout requirements for PCIe interface

PCI-Express, abbreviated as "PCI-e," is a high-speed serial computer expansion bus standard. PCI-E belongs to the high-speed serial point-to-point dual-channel high-bandwidth transmission category, where connected devices are allocated dedicated channel bandwidth and do not share the bus bandwidth.

Feb 25, 2026 1

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FPC Process: Blind and Buried Vias, Lamination, Electroplating High-End Process

The performance and reliability of FPC circuit boards depend not only on design but also on manufacturing processes. Especially for high-end FPCs, processes such as blind and buried vias, precision lamination, and electroplating directly determine product quality. Many designers focus solely on desi

Feb 24, 2026 1

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How to balance impedance, cost, and yield for 4/6/8-layer impedance-controlled PCBs

**Stackup Design: The Soul of Controlled-Impedance PCBs** For the same target impedance, different stackups can lead to cost differences exceeding 30% and drastically different yields.---### **I. Five Core Principles of Stackup Design (Must Be Followed)** Regardless of the layer count, stackup des

Feb 06, 2026 1