PCB board custom proofing service

In the development process of modern electronic products, the quality of circuit boards directly affects the performance and reliability of electronic equipment. In order to ensure the quality of products, many companies choose to carry out custom proofing of PCB boards. This link is very important for product development and production. So, what exactly does PCB board customization proofing service include?

sign and consulting services

1. Demand analysis: PCB manufacturers need to have in-depth communication with customers to understand their specific needs, including circuit functions, dimensions, materials, and application scenarios. Only by fully understanding customer needs can we provide suitable PCB solutions.

2. Design for manufacturability (DFM) review: After the PCB design is completed, a DFM review is required to ensure that the design solution is feasible in the actual manufacturing process and to avoid manufacturing problems caused by design defects.

Material selection and preparation

1. Substrate material: Common substrate materials include FR4, CEM-1, CEM-3, high-frequency materials, etc. The selection of substrate material should be based on the operating frequency of the circuit, environmental requirements, and cost considerations.

2. Conductive materials: Commonly used conductive materials include copper foil, which is usually divided into electrolytic copper and rolled copper. The thickness of the copper foil is usually between 18 microns and 105 microns, and is selected based on the current carrying capacity of the line.

3. Pads and plating: The pads and conductive paths of PCB usually require special treatment, such as tin plating, immersion gold, electroless nickel plating, etc., to improve the welding performance and durability of PCB.

Manufacturing technology and process control

1. Exposure and development: The designed circuit diagram is transferred to the copper-clad board through exposure, and a clear circuit pattern is formed after development.

2. Etching: The part of the copper foil not covered by the photoresist is removed through chemical etching, and the designed copper foil circuit is retained.

3. Drilling: Drill various via holes and mounting holes on the PCB according to the design requirements. The location and diameter of these holes need to be very precise.

4. Electroplating: Electroplating is performed in the drilled holes and on the surface lines to increase conductivity and corrosion resistance.

5. Solder resist layer: Apply a layer of solder resist ink on the PCB surface to prevent solder paste from spreading to non-soldering areas during the soldering process and improve the welding quality.

6. Silk screen printing: Silk screen character information, including component locations and labels, is printed on the surface of the PCB to facilitate subsequent assembly and maintenance.

sting and quality control

1. Electrical performance test: Use professional testing equipment to check the electrical performance of the PCB to ensure that each line is connected normally and that there are no short circuits, open circuits, etc.

2. Functional testing: Carry out functional testing based on actual application scenarios to verify whether the PCB can meet the design requirements.

3. Environmental testing: Test the PCB in extreme environments such as high temperature and high humidity to check its reliability in harsh environments.

4. Appearance inspection: Through manual or automatic optical inspection (AOI), detect whether there are defects on the PCB surface, such as line breaks, hole position deviation, etc.

Small batch trial production and feedback

1. Small batch production: Produce a certain number of PCBs according to customer needs for further testing and verification.

2. Feedback analysis: Feedback problems found during small batch trial production to the design and manufacturing team to make necessary optimizations and improvements.

3. Optimization and adjustment: Based on trial production feedback, the design plan and manufacturing process are adjusted to ensure product quality and reliability.

PCB board custom proofing service is a systematic project covering DFM, material selection, manufacturing process, testing, trial production and after-sales service. It is not only a simple manufacturing process, but also an all-round guarantee of product quality.

By rationally utilizing these services, companies can effectively improve product performance and reliability, shorten the research and development cycle, and improve market competitiveness.