High frequency PCB Manufacturer-Shenzhen Chengchi Circuit Technology Co., Ltd.

PCB Test Pins

PCB Test Pins are specialized electrical connectors designed to facilitate the testing and validation of printed circuit boards (PCBs) during manufacturing, assembly, and quality control processes. These pins serve as temporary, high-precision contact points that establish electrical connections bet

Mar 02, 2026 1

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JLC PCB Technology Class: Learn to Understand PCB Manufacturing Processes!

Common PCB Working Layers: - **Routing Layer**: Located on the top layer, bottom layer, and inner layers of multi-layer boards. Used to draw copper traces that carry current, such as pads, traces, and copper pours. - **Silkscreen Layer**: Also known as the legend layer. Used to mark component anno

Mar 02, 2026 1

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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