First Piece Quality Control In SMT Assembly

SMT assembly is a vital process in the manufacturing process of electronic products, and its quality directly affects the performance and reliability of the final product.
Control first piece quality is a significant part of PCB SMT patch assembly quality control and is the key to ensuring product quality.

The Purpose of the First Piece of Quality Control

The purpose of first-item quality control is to detect and eliminate defects that affect product quality by conducting comprehensive testing and inspection on the first piece to ensure that the products meet customer requirements.

The First Piece of Quality Control Content

The content of first-piece quality control mainly includes the following aspects:

1) Material Inspection

Check the electronic components, PCB boards, and solder paste used to ensure they meet product requirements

2) Process Inspection

Check the SMT placement machine, reflow oven, and other equipment to ensure they are in good condition.

3) Mounting Quality Inspection

Check the part’s position, angle, and polarity to ensure they meet the drawing requirements.

4) Welding Quality Inspection

Check the solder joint’s shape, size, and strength to ensure they meet the requirements.

First Piece Quality Control Method

The main methods of first-piece quality control are as follows:

1) Visual Inspection

Visual inspection can find defects such as incorrect component position and poor solder joint shape.

2) First Piece Tester

using testing instruments to test the product can find defects, for example, insufficient solder joint strength and incorrect component parameters.
Our Pcbandassembly TFT350 first piece tester has obtained many national patents and has always been in the leading position in SMT testing.

3) X-ray Inspection

Use X-ray inspection equipment to inspect products and find internal defects such as Components installed incorrectly and voids.

First Piece Quality Control Process

We at Pcbandassembly have implemented a strict quality control process in terms of first-piece quality control;
The process we follow is as follows
1. Open the MES system and inquire about the order according to the label order number.
2. Check the original documents and production notes in the order information.
3. Double-click in the production BOM’s the machine model to open the engineering data.
4. Download the SMT placement program, and open it, copy the BOM and coordinates.
5.Enter the test, open the program, load the desktop picture, and fill in the furnace temperature for testing.
6. After testing the capacitance and resistance, check the material polarity of the drawings.
7.After completing the test and polarity check, click finish test and select the test result.
8.Notify production of test results and conduct the first piece past the furnace.
9.After passing through the furnace, check the product’s furnace passing effect, tinning, deviation, whether the tin is melted, etc.
10. Hang the first piece of identification card and send it for sample production.

First Piece Quality Control Considerations

When conducting first-piece quality control, you should pay attention to the following points:
• First piece quality control should be performed by experienced personnel.
• First piece quality control should be carried out strictly following the standards.
• First-piece quality control should detect and eliminate defects promptly.

The Significance of the First Piece Quality Control

First-piece quality control is a significant means to ensure product quality. It can effectively prevent the production of batch defective products.
By conducting comprehensive testing and inspection on the first piece, defects that affect product quality can be discovered and eliminated, ensuring that the product meets customer requirements.

Conclusion

SMT patch processing is the key to ensuring product quality. We should attract attention.
By strictly following the standards for first-piece quality control, we can effectively prevent batch defective products and ensure product quality.