PCB Technical - Ten matters for pcb proofing production requirements

The design of the circuit board needs to be processed by the circuit board manufacturer, then proofread back to the soldering of each component, and finally assembled on the product shell to form a complete electronic product. Therefore, PCB proofing is an important link in the production process of electronic products. So what matters should be paid attention to in order to get good quality printed circuit board proofing, the following editor will explain in detail.

1. Plate thickness: 0.8, 1.0, 1.2, 1.6, 2.0 These are commonly used specifications. If there is no special requirement, 1.6mm plate thickness can be selected.

2. Copper foil thickness: 0.5, 1.0, 2.0. This is a common specification. If the power supply is not a particularly large board, the manufacturer will generally use a 0.5oz board for it. If the power is about 100W, the power supply board will use more than 1.0 .

Resistance welding colors: green, black, red, white. These are commonly used. There is no requirement to use green. If it is your own experiment, you should use green because the board lines of this color can be seen most clearly.

4. PCB pad processing: Immersion gold, anti-oxidation, tin spraying (two lead-free and lead-free), generally the latter two can be used, and the tin spraying storage time is longer.

Screen printing color: white and black are common colors. If it is green oil, white text is generally used. This is mainly for the line to be clearly seen. The color contrast with the plate is large. If it is white solder text, black is used. Word.

6. Selection board: FR-4 This is commonly used, and the double-sided board has FR-4.

7. Pay attention to the control of the number of samples

Because circuit board proofing is usually used for small batch production, the startup cost of proofing manufacturers is higher, which will increase the cost of enterprise proofing. Therefore, in order to better control the cost, the company will first calculate the NEE before the circuit board proofing. d Responsible for the assembly of samples and spare parts, and control the number of samples.

8. Pay attention to the review and proofreading process

Since PCB circuit board proofing can take many different processes, in addition to looking for professional circuit board proofing manufacturers, special attention should be paid to the proofing process adopted by the manufacturer to ensure the proofing process adopted by the manufacturer. The configuration of OCESS can meet the design and manufacturing requirements of the company on the circuit board, in addition to having a good anti-back-flying probe test capability.

9. Pay attention to the arrangement of the proofreading signal

Whether the complete signal layout model is reasonable will affect the quality of the entire proofing, so when the circuit board is proofed, attention should be paid to the layout of the proofing signal to ensure completeness and reasonableness, and the electrical components should be fully checked to better improve the electrical performance of the PCB. Cal has stable performance and can also reduce noise.

10. In addition, PCB companies should pay attention to good communication with the designers and operators of the proofing manufacturer during the circuit board proofing. When sending proofing materials, they should carefully check the packaging of related documents and components to avoid missed delivery to CA. In some minor matters, the proofing is not good or the effect is not good due to negligence.