JEXPCB / Engineering knowledge
Knowledge Center
Clear answers for better builds. Practical guidance on PCB manufacturing, assembly, component sourcing and engineering decisions—from the first file review to production release.
Featured Articles
Start with these practical guides for your next PCB or PCBA project.
What Files Are Required for a PCB Assembly Quotation?
Prepare a consistent Gerber, BOM and placement package, define the assembly scope and learn how to start with incomplete files.
ENIG vs HASL: How to Choose the Right PCB Surface Finish
Compare planarity, assembly requirements, cost and lead-free specifications before choosing ENIG or HASL for a PCB.
Latest Articles
New technical guidance, automatically added when an article is published.
PCB Backdrilling: When Via Stubs Become a Signal-Integrity Risk
A practical engineering guide to via-stub risk, backdrill decisions, manufacturing tolerances and inspection evidence for high-speed PCBs.
Mixed SMT and Through-Hole Assembly: How Process Sequence Affects Quality
How process order, thermal exposure, component access and soldering method shape the quality of mixed SMT and through-hole assemblies.
How AI Hardware Demand Is Reshaping PCB Capacity and Material Lead Times
AI demand is concentrating pressure on high-layer-count PCB, HDI, low-loss laminate and advanced test capacity. Learn what buyers should verify.
PCBA Panel Design: Rails, Fiducials, Tooling Holes and Breakaway Methods
A practical PCBA panel-design guide covering rails, fiducials, tooling holes, V-score, tab routing, depanelization stress and release data.
Ionic Contamination: Why a Visually Clean PCBA May Still Carry Reliability Risk
Learn how invisible ionic residues can cause leakage, corrosion and electrochemical migration, and how to build risk-based PCBA cleanliness controls.
Component Obsolescence: How to Manage PCN, EOL and Last-Time-Buy Risk
A practical component-obsolescence workflow for PCN and EOL notices, alternate qualification, last-time-buy planning, traceability and production control.
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