Senmax Technology
PCB · PCBA Manufacturing

Engineering Blog

Insights from the production floor

Practical PCB and PCBA engineering articles — written by the team that builds your boards.

PCB Design

HDI PCB Design Guide: Microvias, Stack-up and Routing

How to design a manufacturable HDI board — microvia structures, dielectric thickness, line/space and the trade-offs that drive cost.

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Quality

IPC-A-610 Class 3 Explained: When You Need It and What It Costs

Class 1, 2, 3 — what the IPC standard actually requires, when Class 3 is mandatory, and how the price difference breaks down.

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DFM

PCBA DFM Checklist: 12 Issues We Catch Before Production

The most common manufacturability defects we flag during DFM review — and how to fix them in your CAD tool before sending Gerbers.

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PCB Design

Multilayer PCB Stack-up: Choosing Layer Count, Dielectric and Copper Weight

How to pick a 4-, 6-, or 8-layer stack-up based on signal integrity, EMI, power delivery and budget.

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PCB Design

Rigid-Flex PCBs: When the Cost is Worth It

Rigid-flex eliminates connectors and cable assemblies, but at 3–5× the bare board cost. Here's when the math works.

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