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eCloud PCB, a Taiwan-based professional team, focuses on fast PCB prototyping and small-batch manufacturing. Backed by rich engineering experience, manufacturing resources and cloud tech, our engineer-oriented online platform supports instant upload, real-time quoting and order tracking for multi-layer boards, HDI and special processes, helping customers speed up R&D and product validation efficiently.

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Insights

Explore the latest trends in PCB design and manufacturing

Insights

Explore the latest trends in PCB design and manufacturing

Material Selection Deep-Dive: How to Choose Microwave PCB Materials — 6 Key Criteria and the CPW Design Logic

As 5G FR2, Wi-Fi 7, 77/79 GHz automotive radar, low-Earth-orbit satellites, and K/Ka-band satellite communications all enter active product development, microwave PCBs (1–30 GHz) and mmWave (above 30 GHz) are no longer a niche concern for RF engineers — they're an engineering reality facing most hardware and communications R&D teams in Taiwan. Yet at the spec stage, engineers often get stuck on two questions: which Rogers grade exactly? And is microstrip enough, or do we need CPW? This article walks through 6 microwave material selection criteria, the logic behind major material families, and CPW coplanar waveguide design and manufacturing considerations.

7/4/2026

Course

Material Selection Series: From M7 to M10 — The Selection Logic and 2026 Supply Landscape of AI Server CCL

As PCIe 7.0 enters mass-production planning and 224G SerDes becomes standard for next-generation AI server switches, Taiwan R&D engineers face more than just higher layer counts or more complex stackups — they confront a physical lower bound. In the PCIe 5.0 era, M7-grade CCL could carry signals 12 to 14 inches; with PCIe 6.0/7.0, picking the wrong substrate means signals may attenuate below the receiver threshold in under 5 inches. M7, M8, M9, and M10 are no longer just CCL marketing tiers — they are hard constraints that must be locked down at design time. This article starts from signal physics, then breaks down the differences between the four grades, the material selection decision matrix, and the 2026 supply landscape for low-Dk CCL.

7/1/2026

Course

Blog Current Events: From GB200 to Rubin Ultra: Why Has the Value of AI Server PCBs Sextupled in Three Years?

While the market focuses on NVIDIA GPU computing power and HBM capacity, few have noticed that the value of PCBs in an entire AI server rack has skyrocketed from approximately $25,000 in the GB200 generation to an estimated $160,000 or more in the Rubin Ultra generation. This sixfold leap in value over three years reflects a structural upgrade forced upon the entire PCB industry. This article breaks down this industry-reshaping technological revolution layer by layer, from signal physics and materials science to manufacturing limits.

6/29/2026

Course

Essential Knowledge for R&D: Comprehensive Guide to PCB Gold Finger Design: Hard Gold Plating, Beveling, and Reliability Practices

In application scenarios requiring frequent insertion and extraction—such as server backplanes, modular instruments, and PCIe interface cards—the row of golden contacts on the edge of the board plays a critical role in determining the reliability of the entire system. These are what the industry commonly refers to as "Gold Fingers." For engineers responsible for PCB design, procurement, or quality control, gold fingers are by no means as simple as "just adding a layer of gold." From the thickness of the nickel-gold stack-up and the tolerance of the bevel angle to the subsequent wear-resistance cycle testing, every link directly impacts the product's service life in the field. This article breaks down the design logic, manufacturing details, and selection criteria for gold fingers from a practical perspective.

6/28/2026

Course

PCB Material Selection Strategy in the AI Era: Balancing Performance, Reliability, and Lead Time During Material Shortages

In the past, PCB material decisions were largely technical issues settled behind closed doors by R&D and ME departments. However, since 2024, the explosive demand for AI servers, HPC accelerator cards, and cloud data centers has completely rewritten the rules of the game. From the Megtron series and M8 to low-Df copper foils and fiberglass cloth, lead times for critical components across the entire supply chain—from upstream CCL (Copper Clad Laminate) manufacturers to downstream substrate plants—have been severely stretched. For R&D engineers and project managers, "choosing the right material" is no longer just about electrical performance; it is a supply chain strategy question that determines whether a project can reach mass production on schedule. This article reviews the selection logic for high-speed, high-frequency, and high-power boards from the perspective of a B2B design team, providing an actionable decision-making framework for the current environment of material shortages.

6/27/2026

Course

Essential R&D Knowledge: High-Frequency PCB Design in Practice – From Materials to Manufacturing, Engineering Keys to RF and Microwave PCBs

As wireless communication pushes from Sub-6 GHz all the way to mmWave, coupled with the comprehensive takeoff of AI infrastructure, automotive radar, low-Earth orbit (LEO) satellites, and Wi-Fi 7, RF and microwave PCB design is no longer the exclusive domain of a few specialized RF engineers. Today, as long as a product involves wireless, sensing, or high-speed serial links, R&D teams must face a reality: traces are no longer just "wires," but an integral part of the entire electrical system. This article will step away from textbook-style bullet points and approach the topic from a practical engineering perspective, discussing the most common pitfalls and the areas most worth investing resources in for hardware design teams planning RF circuit boards.

6/26/2026