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

High-Frequency & High-Speed PCB Stack-up and Key Design Guidelines

Once the base material is selected, the stack-up structure becomes the second core pillar of high-frequency and high-speed PCB design. The logic used for standard PCB stack-ups cannot be directly applied to high-frequency/high-speed products. The stack-up dictates impedance control, signal return pa

Aug 21, 2026 343

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Controlled Impedance in Multilayer PCBs: A Must-Know Technical Requirement for High-Speed Hardware

In the design of high-speed interfaces such as DDR, PCIe, Gigabit Ethernet, and LVDS, controlled impedance in multilayer PCBs is no longer optional—it is a mandatory technical specification. Many hardware engineers simply equate impedance control with setting a 50Ω or 100Ω parameter, overlooking the

Aug 20, 2026 119

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Technical Specification for Single-Ended and Differential Impedance Routing in Multi-Layer PCBs

Following the completion of stack-up design and impedance parameter calculations, the implementation details during the routing phase directly determine whether the physical impedance of the multi-layer board meets technical requirements. Many engineers receive feedback from fabrication houses stati

Aug 19, 2026 550

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Multilayer PCB Impedance Failure Analysis and Complete Acceptance Specification

In multilayer PCB prototyping, it is common to encounter scenarios where simulations pass perfectly, yet TDR measurements on the fabricated boards reveal significant impedance deviations. This often leads to random bit errors and interface instability during device debugging. Impedance failure is a

Aug 18, 2026 363

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PCB Classification by Manufacturing Process: A Complete Guide to HDI, Heavy Copper, and Impedance Control Boards

For PCBs with identical base materials and layer counts, adopting different manufacturing processes results in drastically different finished board capabilities. Many engineers focus solely on layer count and substrate, overlooking how process choices define capability boundaries. Designs are often

Aug 17, 2026 214

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Application Scenarios and Pitfall Guide for White, Red, and Blue Solder Masks

Beyond the classic green and black, colored solder masks—white, red, blue, and others—are increasingly common in various products. White PCBs are widely used in LED lighting; red is often seen on development boards and high-voltage warning labels; and blue is prevalent in certain industrial control

Aug 15, 2026 166