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The reason why there is no copper through hole in the hole?
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In today's electronics industry, PCB (printed circuit board) is a crucial part. As a basic carrier of electronic components, the quality of PCB production directly affects the performance and reliability of the entire electronic product. In this process,PCB manufacturerWe must pay close attention to some potential problems, such as through hole.
Vias (Via) are very common in multi-layer PCB design. They connect the circuits of different layers through the conductive layer in the hole, and play a role in communicating and transmitting electronic signals. However, some problems in the PCB production process may cause the via hole to be blocked and there is no copper in the hole, thus affecting the normal operation of the PCB.
In the PCB production process, the problem of no copper in the hole may arise from a number of aspects. First of all, it is the technical problem of chemical corrosion or electroplating in the production process. If the temperature, concentration or electrolyte stirring of the plating solution is not sufficient to achieve the ideal conditions, the effect of copper plating will be greatly reduced. Second, improper PCB design can also result in no copper in the hole. For example, the pad size design around the via hole is too small, or the spacing of the inner layer copper foil is too narrow. In this case, in the process of drilling or plating, it is easy to cause the via hole. In addition, PCB manufacturers must control parameters such as aperture and hole depth when drilling, otherwise similar problems will occur.
PCB manufacturers should ensure the integrity and power-on performance of vias from multiple aspects. First of all, it is necessary to select the appropriate production process and high-quality raw materials to ensure the smooth progress of key links such as electroplating and drilling. Secondly, the manufacturer should optimize the via design in strict accordance with the electronic design specifications, such as the ratio of orifice to pad, the thickness of copper in the hole, etc. Finally, through the effective quality inspection means, through hole detection. For example, technologies such as X-ray inspection equipment and flying needle testing are used to ensure the quality of the vias.
In short, in order to reduce the risk of no copper in the PCB via hole, PCB manufacturers need to strictly control every link from the aspects of production process, design optimization and quality inspection. This will help improve the quality level of PCB and ensure the normal operation of electronic equipment.
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