How to reflow double sided pcb

 At present, the mainstream circuit board assembly technology in the SMT industry should be reflow soldering. Of course, there are other circuit board soldering methods. Double-sided reflow can save the space of the circuit board, which means that smaller product can be achieved, so most of the double sided pcb boards seen on the market belong to the double-sided reflow process.

Because the double-sided reflow process requires two reflows, there are some process limitations. The most common problem is that when the pcb board goes to the second reflow furnace, the parts on the first side will be affected by gravity and dropped, especially when the board flows to the reflow zone of the furnace at high temperature, below we will explain the precautions for the placement of parts in the double-sided reflow process:

Firstly, smaller parts are recommended to be placed on the first side to pass through the reflow oven, because the deformation of the PCB will be smaller when the first side passes through the reflow oven, and the precision of solder paste printing will be higher, so it is more suitable to place smaller parts.

Secondly, the smaller parts will not be at risk of falling during the second pass through the reflow oven. Because the parts on the first side are placed directly on the bottom side of the circuit board when hitting the second side, when the board enters the reflow area, it will not fall off the board due to excessive weight.

Thirdly, the parts on the first side must go through the reflow oven twice, so its temperature resistance must be able to withstand the temperature of two reflows. The general resistance and capacitor are usually required to pass the high temperature of at least three reflows. This is to meet the requirements that some boards may need to go through the reflow furnace again due to maintenance.

FAQs for Double-Sided PCBs at Hitech Circuits

  1. Can Hi-Tech Circuits customize Double-Sided PCBs? Absolutely! We offer custom PCB design and manufacturing services to meet your specific requirements. Whether you need unique shapes, sizes, or specific electronic components, we can accommodate your needs.
  2. What is the lead time for Double-Sided PCB orders? Lead times can vary depending on the complexity and quantity of your order. Generally, our lead times range from 5 to 15 working days. For more precise estimates, please contact our customer service.
  3. Do you offer prototyping services for Double-Sided PCBs? Yes, we do! Prototyping is an essential step in the PCB development process, allowing you to test and refine your design before moving to mass production. We offer quick and cost-effective prototyping services.
  4. How do you ensure the quality of your Double-Sided PCBs? We adhere to strict quality control standards throughout the manufacturing process, including inspection of raw materials, in-process inspection, and final testing. Our commitment to quality ensures that you receive reliable and durable PCBs.
  5. Can Hi-Tech Circuits assist with PCB layout and design? Yes, our team of experienced engineers can assist with PCB layout and design, ensuring your PCB meets all electrical and mechanical requirements for optimal performance.
  6. What file formats do you accept for Double-Sided PCB designs? We accept various file formats, including Gerber files, Eagle, Altium, and KiCad. If you have another format, please contact us, and we’ll do our best to accommodate your needs.
If you’re interested in our products, pls kindly email to Sandy: sales9@hitechpcb.com



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