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What is the production process of a circuit board factory

Published on:

2023-05-12 15:36

【Common circuit board types】

Common types of circuit boards are single-sided, double-sided and multi-layer boards. There is only one circuit on a single side, two circuits on a double panel, and more than two layers on a multilayer board. In addition, there are rigid circuit boards and flexible circuit boards, which have their own characteristics and have corresponding applications in different occasions.

【Overview of circuit board production process】

The circuit board manufacturing process can usually be divided into the following steps: drawing, photomask production, inner circuit board production, outer circuit board production, hot pressing and drilling, surface treatment, and finally circuit board inspection. We'll cover these steps in detail next.

【Drawing and photomask making】

First of all, the circuit diagram design and production should be carried out. The circuit diagram is then converted into a circuit diagram and a photomask is made. The photomask is the base board used for lithography to create the final circuit diagram. Make a light mask with two sides as needed.

【Making inner circuit board】

The photomask is pressed with the inner substrate, and then the excess copper is removed using chemical corrosion or machining methods on the copper plating layer to form an inner layer line.

【Making an outer circuit board】

The inner circuit board copper clad layer is pressed with the outer substrate, and the outer circuit is etched out again with a photomask.

【Hot pressing and drilling】

While covering the outer circuit board with the inner circuit board, it is fixed together using high temperature and high pressure conditions. Holes are then drilled to form holes for the soldering of electronic components and holes for wire connections between holes.

【Surface treatment】

Surface treatments include electroless gold plating and sputter tin. These methods, in addition to surface treatment, also play a flying point role to ensure the connection quality of electronic components.

【Circuit board inspection】

Finally, a perceptual check is carried out to see if the circuit board meets the requirements. After all the line tests, the final surface is cold pressed and packaged and finally handed over to the customer.

The manufacture of circuit boards is a very rigorous process, and any link needs to strictly adhere to the process flow. Excellent circuit board factory process can ensure the quality of circuit board, so that the quality of electronic products is higher and the performance is more stable.

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