PCB电路板步骤流程外贸英文翻译
PCB Circuit Board Production Process
PCB (Printed Circuit Board) is an integral part of almost all electronic devices. The production of PCBs involves a series of steps to ensure the final product meets the required specifications and quality standards. In this article, we will walk you through the PCB production process, from design to final inspection.
Material Selection - After the prototype is approved, the next step is material selection. PCBs are made using various materials, including copper, fiberglass, and solder mask. The selection of materials is based on factors such as the intended application and the desired performance of the PCB.
Preparation - After selecting the materials, the next step is to prepare them for production. This involves cutting the base material, such as fiberglass, into the desired size and shape. The copper foil is then laminated onto the base material.
Printing - In the printing process, the PCB design is transferred onto the board using a photosensitive film or photoresist. This process involves exposing the film or resist to UV light through a stencil or mask. After exposure, the unexposed areas are removed, leaving behind the desired pattern.
Etching - Etching is a crucial step in PCB production. In this process, the PCB is immersed in an etchant solution, typically an acid, to remove the unwanted copper. The etching solution dissolves the exposed copper, leaving behind the copper traces and pads as per the design.
Plating - Plating is done to protect the exposed copper surfaces and improve solderability. The PCB is plated with a thin layer of solder or a metallic substance, such as gold or tin, to prevent oxidation and enhance conductivity.

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