FR4 single and double board custom processing

FR4 board is the code for a flame-resistant material grade, which means that the resin material must be able to self-extinguish after burning.

It is a kind of circuit board raw material and base material, which is composed of fiberglass cloth and epoxy resin. It has high strength and flame retardancy. FR4 boards are widely used in the electronics industry, mainly for manufacturing printed circuit boards (PCBs).

FR4 single and double panel custom processing: process flow and technical requirements


FR4 single and double board custom processing

FR4 is an insulating material widely used in the electronics industry and is favored for its excellent electrical, mechanical and thermal properties. In electronic equipment, FR4 is often used to manufacture printed circuit boards (PCBs), especially single and double panels.

With the continuous development of science and technology, the demand for customized processing of FR4 single and double panels is growing day by day.

This article will introduce in detail the process flow, technical requirements and related precautions for custom processing of FR4 single and double panels.

FR4 single and double board custom processing process

FR4 single and double board custom processing process
  1. Original material preparation: According to customer needs, prepare FR4 materials of corresponding specifications and quality. At the same time, ensure that the purchased materials have corresponding quality certificates and environmental certifications.
  2. Cutting and cutting: Precisely cut and cut large pieces of FR4 plate according to the design requirements to prepare for the next process. During this process, attention should be paid to maintaining the flatness and cleanliness of the board to prevent quality problems caused by surface contamination or scratches.
  3. Drilling and Grooving: According to the requirements of the design drawings, drill and groove the FR4 plate. The location and size of the drilled holes must be precisely controlled to ensure that subsequent assembly and welding processes can proceed smoothly. At the same time, attention should be paid to the quality and accuracy of the holes to prevent problems such as too large, too small or inaccurate positions.
  4. Graphic transfer: Transfer the circuit design graphics to the FR4 board. This step is usually completed through a dry film or wet film process. During the pattern transfer process, the accuracy and clarity of the pattern must be ensured to meet subsequent etching and plating requirements.
  5. Etching and film removal: Use chemical or physical methods to etch away the unnecessary copper layer and remove the dry film or wet film at the same time. This step is an important step in forming the circuit pattern. The etching time and temperature need to be strictly controlled to ensure the integrity and accuracy of the circuit lines.
  6. Electroplating: Electroplating a layer of metal on the necessary copper lines to improve its conductivity and corrosion resistance. The thickness and uniformity of the electroplating layer have an important impact on the performance and service life of FR4 single and double panels, so the electroplating process parameters need to be strictly controlled.
  7. Surface treatment: According to actual needs, surface treatment is performed on FR4 single and double panels, such as tin spraying, immersion gold, etc. These surface treatments can improve the board’s solderability and corrosion resistance while beautifying its appearance.
  8. Assembly and welding: Weld the electronic components to the FR4 single and double panels according to the design requirements. During the assembly process, it is necessary to ensure that the position and direction of component placement are accurate, the quality of solder joints is reliable, and problems such as false soldering and false soldering should be avoided.
  9. Inspection and testing: Comprehensive inspection and testing of finished FR4 single and double panels, including appearance inspection, electrical performance testing, etc. Unqualified products should be reworked or scrapped in a timely manner.
  10. Packaging and transportation: Finally, the finished FR4 single and double panels are packaged and shipped according to the customer’s requirements. The packaging should be strong and reliable to prevent damage during transportation; at the same time, the packaging materials should meet environmental protection requirements to reduce the impact on the environment.

Technical requirements and precautions

  1. Material selection: To select the appropriate FR4 material according to actual needs, you must consider not only its electrical performance, mechanical performance, thermal performance and other indicators, but also cost and environmental protection factors.
  2. Processing accuracy: Strictly control various process parameters during the processing to ensure that the accuracy and quality of each link meet the design requirements. In particular, key steps such as drilling, grooves and graphic transfer require more attention to detail control.
  3. Environmental protection: During the production process, attention should be paid to environmental issues and the waste materials and wastewater generated should be reasonably disposed of. Try to choose environmentally friendly materials and processes to reduce the impact on the environment.
  4. Quality control: Establish a complete quality control system to ensure strict inspection and testing procedures in every link. Unqualified products should be traced and processed to prevent problematic products from entering the market.
  5. Safety production: Pay attention to safety production management during the production process to prevent safety accidents caused by improper operation or equipment failure. Inspect and maintain the equipment regularly to ensure its normal operation and safety.
  6. Technology update and research and development: Pay attention to industry trends and technology development trends, constantly update equipment and process technology, and improve production efficiency and product quality. At the same time, we will increase investment in research and development and develop core technologies with independent intellectual property rights.
  7. Customer communication and understanding of needs: Strengthen communication and exchanges with customers to fully understand their needs and expectations. Customize production and services according to customers’ specific requirements to improve customer satisfaction and market competitiveness.
  8. Compliance and certification: Ensure that the products produced and sold comply with relevant laws, regulations and industry standards. Actively apply for relevant certifications, such as ISO 9001 quality management system certification, RoHS environmental certification, etc., to improve corporate credibility and market recognition.
  9. Personnel training and management: Provide regular skills training and safety education to employees to improve their operational skills and work safety awareness. At the same time, we strengthen personnel management, establish a complete incentive mechanism and assessment system, and stimulate employees’ enthusiasm and creativity.
  10. Supply chain management: Optimize the supply chain management process to ensure stable quality and delivery of raw materials and parts. Establish long-term cooperative relationships with suppliers to jointly respond to market changes and challenges.


Customized processing of FR4 single and double panels is a complex project involving multiple links and technologies.

In order to ensure the quality and reliability of the final product, every link needs to be strictly controlled, from material selection and processing accuracy to quality control and safe production.

At the same time, companies should pay attention to the comprehensive development of technology updates and research and development, customer communication and demand understanding, compliance and certification, and supply chain management to enhance overall competitiveness.

By continuously optimizing the process flow and technical requirements, we can meet customers’ needs for high-quality FR4 single and double panels, and win more market share and customer trust for the company.

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