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

Frequent Open/Short Circuits on 6-Layer Heavy Copper PCBs? Don’t Copy-Paste Etching Parameters from Standard Boards

Many hardware engineers directly apply the Design Rule Check (DRC) settings of standard 1oz six-layer boards to 2oz or 4oz heavy copper multilayers. A common mistake is retaining inner layer trace/space rules at 4mil/4mil. Post-prototype, this leads to two typical failures:Open circuits caused by ov

Jul 10, 2026 221

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Four-Layer Blind/Buried Via Impedance Consistently Out of Spec? Via Structure Optimization Guide

Controlling impedance in four-layer blind/buried via designs isn't just about adjusting trace width; the synergistic design of the blind via structure, dielectric thickness, and inner reference planes is paramount. Even if trace widths perfectly match simulation parameters, excessive antipad sizes o

Jul 09, 2026 243

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Power Integrity and Plane Optimization Design for High-Layer-Count High-Speed PCBs

High-speed digital chips feature low core voltages, rapid transient current changes, and severe load fluctuations. Core devices such as CPUs, FPGAs, and high-speed buses are extremely sensitive to power supply noise, voltage ripple, and transient voltage drops. High-layer-count PCBs offer advantages

Jul 08, 2026 443

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Is Higher or Lower PCB Impedance Better?

In the field of high-speed PCB design, a common misconception among junior engineers is whether impedance values should be maximized or minimized. The reality is that PCB impedance should neither be too high nor too low; impedance matching is the key.The characteristic impedance of a PCB trace is de

Jul 07, 2026 45

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Why is Impedance Testing Necessary for PCBs?

With the rapid advancement of technologies such as 5G communication, artificial intelligence, and high-speed computing, the operating frequencies of modern electronic devices have soared into the GHz range. As a result, impedance testing for printed circuit boards (PCBs) has evolved from an optional

Jul 06, 2026 55

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How DFM Optimization Proactively Mitigates Systemic PCB Assembly Defects

When PCB assembly lines encounter mass defects such as tombstoning, bridging, cold solder joints, component shifting, and persistently high rework rates, most factories habitually resort to adjusting solder paste parameters, calibrating pick-and-place machines, or modifying reflow profiles as reacti

Jul 04, 2026 394