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Technical Article

How To Choose PCB Assembly Technology For Circuit Board?

Time:2020-12-24 11:24:20 Click:

How to correctly choose PCB Assembly technology for circuit board?





1. Single-sided SMT mounting


The solder paste is added to the component pad, after the solder paste printing of the bare PCB is completed, the relevant electronic components are mounted through reflow soldering, and then reflow soldering is performed.


2. Single-sided DIP welding


The PCB board that need to be plug-in is subjected to wave soldering after the production line workers insert the electronic components. After the soldering is fixed, the feet can be cut to wash the board, but the wave soldering production efficiency is low.


3. Single-sided SMT & DIP mixed


The PCB board is printed with solder paste, the electronic components are mounted and then fixed by reflow soldering. After the quality inspection is completed, DIP insertion is performed, and then wave soldering or manual soldering. If there are fewer through-hole components, manual soldering is recommended .





4.Top-sided SMT mounting and Bottom-sided DIP welding mixed


Some PCB boards are double-sided, but one side is mounted and the other side is inserted. The process flow of mounting and inserting is the same as single-sided Assembly, but the PCB board need to use jigs for reflow soldering and wave soldering.


5. Double-sided SMT mounting


In order to ensure the aesthetics and functionality of the PCB board, some PCB board design engineers will adopt double-sided mounting. IC components are arranged on side A and other SMD components are mounted on side B. Make full use of the PCB board space to achieve a small PCB board area.


6. Double-sided mixed


The following two methods are mixed on both sides:

The first method is three times heating for PCB Assembly, and the efficiency is low, and the pass rate of wave soldering using the red glue process is low, which is extremely not recommended.


The second method is suitable for cases where there are many double-sided SMD components and fewDIP components. Manual welding is recommended. If there are many DIP components, wave soldering is recommended.





SMT Assembly Capability


1. The largest board: 310mm*410mm (SMT);

2. Maximum board thickness: 3mm;

3. Minimum board thickness: 0.5mm;

4. The smallest Chip parts: 0201 package or parts above 0.6mm*0.3mm;

5. The maximum weight of the mounted parts: 150 grams;

6. Maximum part height: 25mm;

7. The largest part size: 150mm*150mm;

8. Minimum lead part spacing: 0.3mm;

9. The smallest spherical part (BGA) spacing: 0.3mm;

10. The smallest spherical part (BGA) diameter: 0.3mm;

11. Maximum component placement accuracy (100QFP): 25um@IPC;

12. Mounting capacity: 3 to 4 million points/day.





Why Choosing Grande To Do PCB Assembly?


1. Strength Guarantee


▪ SMT factory: With imported SMT machines and multiple optical inspection equipment, which is able to produce 4 million points per day. Each process is equipped with QC personnel who will keep an eye on product quality.

▪ DIP production line: Two wave soldering machines and more than 10 employees who have worked for over three years. That’ s to say, these workers are highly skilled and can weld various SMT & DIP components.


2. Quality Assurance With High Cost Performance


▪ High-end equipment can paste precision special-shaped parts, BGA, QFN, 0201 package. It can also be soldered prototype pcba via SMT machine and placing bulk materials by hand.

▪ Both samples, small and large batches can be produced. And there is no SMT Machine starting cost.


3. Rich Electronic Products SMT Soldering Experience With Stable Delivery


▪ Accumulated services to thousands of electronics companies, involving SMT soldering services for various types of automotive equipment and industrial control motherboards. Furthermore, PCBA products are often exported to Europe and the United States, and the quality is able to be affirmed by new and regular customers.


4. Strong Maintenance Ability & Reliable After-Sales Service


▪ The maintenance engineers have sophisticated experience so that those defective boards caused by all kinds of smt soldering can be repaired. Meanwhile, ensuring the connectivity rate of each circuit board also make sense.

▪Order problems feedback will get response, solution and solved as soon as possible.






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Next:PCB Assembly Rework & Repair Guidelines

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