1. Our team confirms the necessary files and order details.
2. Manufacture SMT stencil (if needed).
3. Program our machines from the BOM and Centroid file, before the materials arrive. Discrepancies found in the files will be addressed.
4. After all the materials are received, our team performs a kit audit of the materials. Discrepancies or additional questions will be addressed. Before the assembly lead time begins we must have all questions answered
5. If all materials are in before 12pm PST, the assembly lead time starts the next business day. Materials received after 12pm PST will be considered received on the next business day. The reason for this is to allow proper time for the materials to go through the kit audit process.
6. The SMT components are assembled first with our automated equipment. The first board goes through extensive QA to assure part placement and polarity are correct. The boards are then inspected (visually and with an AOI machine) as they come off the reflow oven.
7. BGA components are X-rayed to verify placement accuracy and to detect any solder bridges.
8. After SMT the boards are washed when applicable.
9. Thru-hole components are inserted and soldered by hand or with a selective soldering machine depending on the quantity and board design.
10. After thru-hole boards are washed again when applicable.
11. A final quality inspection is performed.
12. The finished PC board assemblies and all extra materials are prepped for packaging. Your materials are shipped back to you, tracking number is sent via email

CHECKLIST

PBC Unlimited wants our customers to experience a seamless and accurate assembly process. To ensure that your job is not placed on hold, please follow these guidelines:

1. Accurate Data
   An error free assembly process requires accurate data. Each job should have a BOM (bill of materials), a pick and place file (also known as a centroid file) and matching Gerber data. Add a DO NOT POPULATE (DNP) column to the BOM if there are parts which should not be populated on the PCB.
2. Ensure Proper Footprints
   Some parts are available in different packages. Make sure that the part you specify in the BOM matches the footprint on the PCB.
3. Organize Components
   Parts should be separated into individual bags or trays. Each bag or tray should be marked with Manufacturer name and Manufacturer part number and all reference designators where the part is used. If needed, you can substitute distributor name and part number in place of (or in addition to) manufacturer information.
4. Multiple Jobs Per Order
   The parts for each job should be packaged separately. Include separate BOM and pick and place file for each job
5. Component Quantities
   Include extra parts to account for possible attrition during assembly.
   
   Extra parts will be required on small builds (1 to 25 boards) as follows:
   We will return any unused parts to you when we ship your assembled boards back to you.
   • 0201 to 0603 size: Minimum extra quantity 25 plus required quantity.
   • 0805 to 1206 size: Minimum extra quantity 10 plus required quantity.
   • On large size components 1 or 2 extra parts is fine.
   • We prefer all SMT parts to be on a continuous strip or reel.
   • For large runs extra parts by percentage is OK
6. Update your BOM and Pick and Place File
   If you have any last-minute design changes, please remember to reflect these changes in your BOM, pick and place file and any other relevant documentation.
7. Mark Polarity
   Make sure you indicate proper orientation for all parts that have polarity. Place a dot or a number “1” on pin 1 of ICs where the orientation is not obvious. Ensure that polarized capacitors and diodes are properly marked.
8. Special Instructions
   Provide detailed instructions for any special procedures required to assemble your boards. Include sketches, photos, PDF files and/or drawings as needed
9. Drop Shipping from Suppliers
   Please ask your suppliers to place your PCB Unlimited Order Number on the outside of any package dropped shipped to us.

 

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I.C.T is a manufacturer of SMT machines. It mainly provides customers with SMT production lines including SMT Stencil Printers,  Pick and place machines, Reflow Oven, AOI Machine, Wave Soldering Machine and PCB Handling Machine etc. I.C.T has more than 25 researches on SMT and DIP technology,  for the world Customers provide SMT total solutions. There are successful cases of SMT technical team in Asia, Europe, America, Africa, and Australia.

I.C.T provide SMT solutions at various stages according to the different needs of customers. I.C.T is not only a provider of SMT equipment and technology, but also is the customer's escort in the field of SMT and DIP.

Welcome more people to discuss with us about SMT technologies and solutions, please contact us for more information:

Tel: +86 13670124230 (WhatsApp/Skype/WeChat)

Email: etasmt@foxmail.com