CEN PCB ASSEMBLY CAPABILITIES

File Needed for Your PCB Order

To ensure a smooth and efficient PCB assembly experience, please submit the following files in a single ZIP archive with your order:

1. Comprehensive Gerber Files:

• Include all necessary layers for accurate PCB fabrication, such as copper, soldermask, silkscreen, solder paste, etc.

2. Precise Centroid File (Pick and Place File):

• This file, also known as a pick and place file, is crucial for component placement during assembly. It should detail component locations, rotations, and reference designators for a flawless assembly process.

3. Detailed Bill of Materials (BOM) in Excel Format:

• Your BOM should provide a clear and comprehensive list of all components required for your PCB assembly. Include the following details:
  • Reference Designators: Unique identifiers for each component on the PCB.
  • Quantity: The exact number of each component needed.
  • Manufacturer Part Number: Specific identification for sourcing the components.
  • Part Description: A brief description of each component’s function.
  • Type: Specify component type (SMT, Thru-Hole, Fine-pitch, BGA, etc.) for proper placement.
  • Package Description (Optional): While not mandatory, including the package description (e.g., QFN32, SOIC, 0805) can further enhance assembly accuracy.

By providing this well-organized information, you’ll expedite the PCB assembly process and guarantee a successful outcome.

Our Streamlined PCB Assembly Process: From Design to Delivery

At CEN PCBA, we take pride in delivering high-quality PCB assemblies with a meticulous and efficient process. Here’s what you can expect:

1. Pre-Production:

• Our team meticulously reviews your order details and verifies the essential files (BOM, Centroid, Gerber files) for any discrepancies.
• We program our advanced machines based on the BOM and Centroid data, ensuring accurate component placement even before materials arrive.

2. Material Inspection:

• Upon receiving all materials, a comprehensive kit audit is conducted. Our team identifies any discrepancies or missing components and promptly addresses any questions you might have.
• To guarantee a smooth production flow, we require all clarifications before assembly commences.

3. Assembly Begins:

• If your PCB design requires SMT (Surface Mount Technology) components, these are assembled first using our automated equipment.
• The very first assembled board undergoes rigorous quality checks to verify correct component placement and polarity.
• As each board exits the reflow oven, it’s meticulously inspected both visually and with an Automated Optical Inspection (AOI) machine.

4. Advanced Quality Control:

• Ball Grid Array (BGA) components undergo X-ray inspection for precise placement and to detect potential solder bridges.
• Following SMT assembly, boards are washed (if applicable) to remove any residual flux.

5. Thru-Hole Components and Final Touches:

• Thru-hole components are meticulously inserted, either manually or using a selective soldering machine depending on the quantity and board design.
• Similar to SMT boards, thru-hole boards are washed again (if applicable) for a clean finish.

6. Final Inspection and Shipment:

• Each PCB assembly undergoes a final quality inspection to ensure it meets all specifications and functions flawlessly.
• Your completed assemblies and any excess materials are carefully packaged and prepared for shipment.
• You’ll receive a tracking number via email for real-time shipment monitoring.

Partner with CEB PCBA for a seamless and reliable PCB assembly experience. Contact us today to discuss your project!

PCB Assembly Checklist: Ensure a Smooth and Accurate Build with CEN PCBA

At CEN PCBA, we prioritize a seamless and accurate assembly process for every customer. To optimize your experience and avoid delays, please follow these key guidelines:

1. Accurate Documentation:

• Essential Files: Every project requires a complete set of documents for error-free assembly. This includes:
  • Bill of Materials (BOM): A comprehensive list of all components with their reference designators. Include a “DO NOT POPULATE” (DNP) column for unpopulated parts.
  • Pick and Place File (Centroid File): This data guides component placement during assembly.
  • Matching Gerber Files: These files accurately represent the PCB’s physical design for fabrication.
• Footprint Verification: Ensure the components listed in your BOM match their corresponding footprints on the PCB layout.

2. Organized Components:

• Clear Labeling: For effortless identification, organize your components into individual, labeled bags or trays. Each label should include:
  • Manufacturer Name
  • Manufacturer Part Number
  • All Reference Designators where the component is used
• Multiple Jobs: Submitting multiple PCB assemblies in one order? Package the parts for each project separately and include distinct BOMs and pick and place files for each.

3. Component Quantities:

• Extra Parts: To account for potential assembly losses, include some extra parts:
  • 0201 to 0603 Size: Minimum 50 extra parts + required quantity.
  • 0805 to 1206 Size: Minimum 25 extra parts + required quantity.
  • Large Components: 1-2 extra parts.
• Preferred Packaging: We prefer all SMT (Surface Mount Technology) parts to be supplied on continuous strips or reels. For large production runs, a percentage-based extra parts approach is acceptable.
• Returns: Any unused parts will be returned with your completed PCB assemblies.

4. Design Updates:

• Consistency is Key: If you make last-minute design changes, ensure these are reflected in your BOM, pick and place files, and any other relevant documents.

5. Polarity Markings:

• Clear Direction: For all polarized components (ICs, capacitors, diodes), clearly indicate their proper orientation. This can be done with a dot or “1” marking on pin 1 for ICs, or appropriate markings on capacitors and diodes.

6. Special Instructions:

• Detailed Explanations: Have specific assembly instructions for your boards? Provide clear descriptions with sketches, photos, PDFs, or drawings to avoid any misunderstandings.

7. Drop Shipping:

• Clear Labeling: If your components are drop-shipped from suppliers, request them to include the CEN PCBA order number on the package exterior for smooth receiving.

By following these simple guidelines, you’ll ensure a streamlined and successful PCB assembly experience with CEN PCBA. If you have any questions, don’t hesitate to contact us!