PCB Engineering Guides

Practical technical references from our Shenzhen factory floor. Written by engineers, for engineers.

PCB Layer Count Guide: 2L, 4L, 6L, 8L+

How to choose the right number of layers. Cost, impedance control, signal integrity, and power plane considerations.

8 min read

Aluminum PCB vs FR4: When to Use Metal Core

Thermal conductivity, cost comparison, and real-world examples. When aluminum saves money — and when it wastes it.

7 min read

PCB Surface Finish: HASL vs ENIG vs OSP

Every surface finish compared — cost, solderability, shelf life, planarity. Decision flowchart included.

8 min read

How to Read Gerber Files: Practical Guide

File extensions decoded, pre-flight checklist, common mistakes, and export tips for KiCad and Altium.

9 min read