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PCB Exposure Process and Considerations

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PCB exposure process includes the following steps:

Preparation: This includes selecting the appropriate exposure board, cleaning the surface of the exposure board to ensure that the surface is flat and dust-free, and selecting the appropriate exposure film.

Exposure Equipment Inspection: Check the exposure equipment, including light source, exposure machine and exposure table and other components to ensure that they are in good working condition.

Exposure Parameter Setting: Set exposure parameters such as exposure time, exposure energy and exposure light intensity according to actual needs.

Exposure: Place the exposed film on the exposure plate to ensure that the two are in close contact, and then place the plate into the exposure machine for exposure.

Post-processing: Includes developing, washing and drying steps to remove residual chemicals and make the surface of the exposure plate clean and dust-free.



The setting of the exposure parameters needs to be precisely controlled, as these parameters directly affect the results of the exposure.

The exposure process needs to ensure that the exposure film is in close contact with the exposure plate to ensure the accuracy and consistency of the exposure.

The development process requires the use of appropriate chemicals to ensure the best development results.

Exposure equipment needs to be regularly maintained and calibrated to ensure stability and accuracy.

The entire exposure process needs to be carried out in a dust-free environment to avoid the effects of dust on the exposure results.

During post-processing, the exposure plates need to be thoroughly cleaned to remove residual chemicals to ensure product quality and reliability.

Different plates and films may require different processing steps and parameters, so the properties and requirements need to be fully understood when selecting materials.

Throughout the process, environmental factors such as temperature and humidity need to be strictly controlled to ensure the best process results.

Operators need to be professionally trained and familiar with the process and equipment operation to avoid problems caused by improper operation.

The whole process needs to follow the relevant safety regulations and environmental protection requirements to ensure the safety and environmental protection of the production process.


In order to obtain better exposure results, the following are some additional considerations:

Material Selection: Choose suitable exposure plates and films to ensure they have high resolution and good alignment accuracy. At the same time, the batch differences of plates and films should be understood to ensure the consistency of the materials.

Pre-exposure Inspection: Before exposure, the exposure plate and film should be inspected to ensure that there are no scratches, stains or other defects. At the same time, the condition of the exposure machine should be checked to ensure that it is in good working condition.

Environmental Control: During the exposure process, keep the environment clean and stable to avoid the influence of dust and temperature fluctuation on the exposure effect. At the same time, attention should be paid to the control of humidity to avoid high humidity resulting in air bubbles between the film and the exposure plate.

Alignment Accuracy: When placing the exposed film, ensure the alignment accuracy between it and the exposure plate to avoid poor exposure due to misalignment. An automatic alignment system or manual adjustment of the position of the exposure table can be used to improve alignment accuracy.

Post-exposure Inspection: After exposure, the exposure plate is inspected to ensure that there are no problems such as poor exposure, light leakage or overexposure. For unqualified exposure boards, they should be treated or re-exposed in time.

Chemical Management: When using chemicals such as developing solution, safety regulations should be followed and protectivee quipment should be worn. Meanwhile, the concentration and pH value of the chemical solution should be checked regularly to ensure that it meets the process requirements.

Equipment Maintenance and Calibration: Regular maintenance and calibration of exposure equipment should be carried out to ensure the normal operation of components such as light source, exposure table and exposure machine. For common problems of the equipment, maintenance records should be established and checked regularly.

Records and Traceability: Detailed records of the data and results of the exposure process should be kept to facilitate problem tracing and subsequent analysis. At the same time, a product traceability system should be established to ensure that the quality and reliability of each product can be traced.

Training and Skill Upgrading: Regular training and skill upgrading should be provided to operators to familiarize them with the process flow, equipment operation and maintenance. At the same time, operators should be encouraged to put forward improvement suggestions and recommendations to continuously optimize the process.

Safety and Environmental Protection: In the operation process, relevant safety regulations and environmental protection requirements should be followed. For the waste gas, waste liquid and other wastes generated, appropriate treatment measures should be taken to ensure that they meet the environmental requirements.

Preventive Maintenance: In addition to routine maintenance, preventive maintenance and upkeep should be carried out, such as regular replacement of light sources and cleaning of the exposure table. This helps to reduce the probability of equipment failure and extend the service life of the equipment.

Synergy With Other Segments: Maintain close communication and synergy with other segments of PCB manufacturing to ensure quality control from the source. At the same time, should maintain a good working relationship with suppliers to ensure the quality of raw materials and supply stability.

Quality Monitoring and Continuous Improvement: Establish a perfect quality monitoring system and regularly evaluate and improve the exposure process. At the same time, we should pay attention to the industry dynamics and technological development, timely introduction of new technologies and new equipment to improve production efficiency and product quality.

PCB exposure process requires strict control and attention to detail. By following the above precautions and taking appropriate measures, you can get better exposure results and improve product quality and reliability.

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