During PCBA manufacturing, many customers ask: “What documents do I need to provide to the factory?”

Incomplete documentation can lead to prototyping rework, delayed delivery, or even failed product testing. This guide provides a complete checklist of PCBA manufacturing documents to ensure your project runs smoothly.

1. PCB Files (Gerber Files & Coordinate Files)

Gerber Files: Define circuit layers, solder mask, and silkscreen layers. Essential for PCB production—without them, prototyping is impossible.
Coordinate Files (XY Data): Indicate precise component locations and angles for accurate SMT assembly.

Tip: Include silkscreen layers with component designators for easier inspection.

2. BOM (Bill of Materials)

The BOM is the “shopping list” for PCBA manufacturing and should include:

• Component models and package specifications
• Accurate part numbers (manufacturer part numbers recommended)
• Quantity and designators (e.g., R1, C2)
• Brand and alternative part information

Why it matters: A detailed BOM streamlines procurement, reduces errors, and speeds up production.

3. Process Documents (Assembly Drawings & Requirements)

Process documents guide assembly and include:

• Component placement orientation (e.g., IC pin direction)
• Soldering requirements (reflow, wave, or manual soldering)
• Special instructions (e.g., adhesive application, waterproof coating, tinning)

Note: Missing process documents often lead to rework and project delays.

4. Test Plan and Test Point Files

For functional (FCT) or in-circuit testing (ICT), provide:

• Test point coordinates
• Test procedures and requirements
• Functional test programs (e.g., firmware burning files)

Benefit: Ensures PCBAs pass functional verification before leaving the factory, reducing defects.

5. Samples or Reference Images (Optional but Recommended)

Provide:

• Physical samples
• High-resolution photos (front and back)
• Images of key component placement

Advantage: Helps factories understand design intent, improving production efficiency, especially for urgent orders.

Risks of Incomplete Documentation

• Missing PCB files → Board cannot be manufactured
• Unclear BOM → Procurement errors, wrong components
• Missing process requirements → Mass rework
• Missing test plan → High defect rate, delayed shipment

Solution: Prepare complete documentation in advance to ensure smoother manufacturing and protect your project timeline.

Summary of Essential PCBA Documents

• PCB files (Gerber + coordinate files)
• BOM (Bill of Materials)
• Process documents
• Test documents (including programming files)
• Samples or physical references

Why Choose TECOO:
With over 20 years in PCBA contract manufacturing, TECOO provides one-stop services: PCB design, manufacturing, component procurement, assembly, soldering, testing, and delivery.

Ensure your PCBA project is error-free and on schedule. Contact TECOO today for a professional document review and optimization consultation to reduce rework and accelerate production.