Knowledge

With the development of electronic technology, precision circuit boards have been widely used in various electronic products. To ensure their reliability and quality, we need to conduct strict quality checks. The following will introduce the requirements for precision circuit board quality inspection, including PCB design, material selection, manufacturing process and final testing.

1. PCB design

Good PCB design can minimize wiring problems. In terms of PCB design, we need to pay attention to the following points:

1. Minimize the length and area of the line to avoid line deformation and cross interference.

2. Arrange components reasonably to reduce the impact of component wiring and welding on the circuit.

3. Ensure good grounding in PCB design, and use multi-layer PCB boards to reduce the impact of electromagnetic waves on lines.

2. Material selection

It is crucial to use high-quality materials for circuit boards. In terms of material selection, we need to pay attention to the following points:

1. The selection of PCB board materials should meet the requirements. For example, glass fiber reinforced epoxy resin board (FR4) should comply with IPC standards.

2. PCB board surface treatment must comply with lead-free and RoHS standards.

3. Select good welding materials and metal chemical reactions and coatings to ensure long-term stability.

3. Manufacturing process

The manufacturing requirements for precision circuit boards are very strict. The following are aspects that need attention during the manufacturing process:

1. Strictly control the number of layers, thickness, hole diameter, etc. of the PCB board to ensure process specifications.

2. Strictly control the board processing process to avoid affecting the circuit.

3. Careful proofing and correction to avoid production defects.

4. Final test

After making the circuit board, we need to conduct final testing. During the testing process, we need to pay attention to the following points:

1. All lines must undergo comprehensive testing such as needle point testing, AOI full board inspection, and X-ray inspection to ensure that the circuit board is defect-free.

2. Before assembling electronic products, the circuit board must be subjected to aging testing to eliminate potential problems.

Precision circuit boards are a very important component of modern electronic products. To ensure the quality of these circuit boards, strict control is required in terms of PCB design, material selection, manufacturing process and final testing. Through the precision circuit board quality inspection requirements introduced in this article, we can better ensure the quality and reliability of electronic products.