Radio frequency printed circuit board (PCB) production process

Abstract

A radio frequency printed circuit board (PCB) production process comprises the following steps: (1), performing cutting, and choosing appropriate high frequency cross-band veneers, copper plates and high frequency prepregs; (2), performing melanism and notching the copper plates to form a first filtering groove; (3), performing laser ablation, and performing laser ablation notching on the high frequency prepregs to form a second filtering groove; (4), performing lamination so that the first filtering groove and the second filtering groove are combined to form a filtering groove and the high frequency cross-band veneers, the copper plates and the high frequency prepregs are compounded to form a PCB; (5), performing plate edge routing and plate grinding; (6), drilling; (7), performing electroless plating copper processing on the positions, except the filtering groove, of the PCB; (8), performing pattern plating; (9), performing lining etching; (10), performing laser ablation; and (11), performing a final inspection. Due to the fact that the size accuracy of the filtering groove is guaranteed, minimum loss of wireless microwave signals in transmitting process is guaranteed, and the copper plates are adopted to perform radiating on the PCB in the using process, the radiating area is enlarged, and the service life of products is prolonged.

Description

technical field [0001] The invention relates to a PCB manufacturing process, in particular to a radio frequency PCB manufacturing process. Background technique [0002] For high-frequency microwave products, the filter circuit design can be parallel lines or stepped slots. When parallel lines are used for filtering, the precision of the line size is very high. If it is a stepped slot, the size of the stepped slot is very demanding. high. When using stepped slots for filtering, it is necessary to set up stepped slots on the PCB board where the microwave line is received or transmitted to prevent loss and attenuation caused by signal non-resonance. [0003] However, the existing PCB boards often use mechanical slotting to open stepped grooves. Due to the limitation of the precision of the tool, the aperture accuracy of the stepped groove can only reach ±100um; when higher precision requirements are required, the aperture accuracy of the stepped groove is not enough. High, of...

AI Technical Summary

Problems solved by technology

[0003] However, the existing PCB boards often use mechanical slotting to open stepped grooves. Due to the limitation of the precision of the tool, the aperture accuracy of the stepped groove can only reach ±100um; when higher precision requirements are required, the aperture accuracy of the stepped groove is not enough. high, often resulting in signal loss and attenuation

And some electronic components with large power amplifiers tend to generate heat when they work, and the existing PCB board lacks a heat sink, which leads to excessive temperature of the PCB board and reduces the service life of the product

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