FPC shape and hole processing technology

FPC shape and hole processing technology of flexible circuit board


At present, FPC is the most widely used in batch machining, and the FPC and FPC samples are mainly controlled by CNC drilling and milling. These technologies are difficult to meet in the future especially the position accuracy standard of size precision, now the new processing technology is gradually applied, such as laser etching, plasma etching, chemical etching technology. These new shape processing technologies have very high position accuracy, especially the chemical etching method not only has high position accuracy, but also has higher production efficiency and lower process cost. However, these techniques are rarely used alone, and are generally used in combination with punch cutting.


The purpose of the classification is FPC contour processing, FPC drilling, FPC groove processing and the relevant parts of the dressing, etc.. The shape is simple and the requirement of accuracy is not too high. The substrate complex shapes for especially high precision, if using a pair of mold processing efficiency does not meet the requirements of the situation, can be divided into several steps of processing FPC, plug parts of specific examples such as insertion in a narrow pitch connector and high density mounting element positioning hole.


FPC guide hole of flexible circuit board


Also known as the positioning hole, the general hole processing is independent of the process, but there must be and line graphics between the positioning of the guide hole. Automatic process is to use CCD camera to directly identify the positioning mark for positioning, but this equipment costs high, the scope of application is limited, and generally does not use. The most widely used method is to drill the locating hole on the basis of the positioning mark on the flexible copper foil. This is not a new technology, but it can obviously improve the accuracy and efficiency. In order to improve punching precision, the hole is machined by punching method with high precision and less chip.


Flexible circuit board FPC punching


Punching is the use of prepared special mold in the hydraulic press or crank punch holes and contour processing. Now the mold is diverse, and other processes sometimes use molds.


FPC milling of flexible circuit board


Milling processing time is in seconds, very short, low cost. Mold making not only high prices and have a certain period, it is difficult to adapt to the change and trial design dispatches. CNC milling CNC machining data, if it is provided with the CAD data, you can do homework immediately. The milling time of each workpiece directly affects the processing cost, the time is long, and the processing cost is high, so the blending processing is suitable for products with high price, little quantity or short trial production time.


 

(Source: internal information)

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