Huaxing PCBA PCB manufacturing insights and articles

Insights & Resources

Technical articles on PCB design, manufacturing, and industry best practices. Written by our engineering team.

Underfill Rework & Repair — What Can Actually Be Recovered

Underfill Rework & Repair — What Can Actually Be Recovered

Underfill is chosen for reliability and then blocks every repair. A practical guide to heat and mechanical removal: board-local rework limits, when to scrap

Solder Paste Jetting Process Qualification — Proving a Stencil-Free Line

Solder Paste Jetting Process Qualification — Proving a Stencil-Free Line

Jetting a board is not the same as qualifying the process. A practical qualification protocol for stencil-free solder paste deposition

Parylene Thickness & Masking — How to Specify and Verify It

Parylene Thickness & Masking — How to Specify and Verify It

Parylene thickness cannot be specified as one number. A practical guide to specifying thickness by location: mask scheme selection

SMT Stencil Aperture Design — Area Ratio, Paste Release & the 0.66 Rule

SMT Stencil Aperture Design — Area Ratio, Paste Release & the 0.66 Rule

How stencil aperture geometry controls solder paste release: area ratio and transfer efficiency maths, the step-stencil rules for fine pitch and connectors

PCB Supplier NDA & IP Protection — Contracts | Huaxing PCBA

PCB Supplier NDA & IP Protection — Contracts | Huaxing PCBA

Gerber files are your product. A practical guide to NDA scope: tooling ownership, controlled data transfer, counterfeit and clone risk, auditability clauses

PCB Outgoing Quality Control — The OQC Gate That Protects Your Line

PCB Outgoing Quality Control — The OQC Gate That Protects Your Line

How a contract manufacturer's OQC gate should be built: inspection basis, AQL sampling, the data pack a buyer should receive

Tombstoning & Head-in-Pillow — Causes and Fixes | Huaxing PCBA

Tombstoning & Head-in-Pillow — Causes and Fixes | Huaxing PCBA

Why tombstoning and head-in-pillow defects pass X-ray, what pad geometry and package warpage cause them, and the process controls that prevent both.

Solder Paste Printing Defects — Causes and Fixes

Solder Paste Printing Defects — Causes and Fixes

The eight solder paste printing defects that survive to reflow, the print parameters behind each, and the corrections that hold on a high-volume SMT line.

PCB Test Coupons — What to Specify Before You Order

PCB Test Coupons — What to Specify Before You Order

Which PCB test coupons to specify for impedance, microsection, solderability and reliability testing, and where they must sit on the panel to be meaningful.

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