Printed Circuit Board (PCB) design plays a crucial role in the development of electronic devices. Whether it’s a simple gadget or a complex machine, the PCB serves as the foundation for all electronic components to function properly. However, designing a PCB requires more than just knowledge of electronics; it also requires a thorough understanding of the manufacturing process.
To ensure the successful fabrication of a PCB, there are fundamental technological requirements that designers must follow. These requirements include the range of dimensions, the shape of the PCB, and the selection of materials.
The range of dimensions is one of the most important technological requirements for PCB design. The width of the board should be between 200mm-250mm, while the length should be between 250mm-350mm. If the PCB is shorter than 125mm in length or 100mm in width, panelization methods can be used to adjust the dimensions to fit the ideal range for production. This facilitates easier component insertion and soldering.
The shape of the PCB is also critical in the manufacturing process. The board should have a rectangular shape, and if it does not require panelization, the four corners of the board should be rounded, as shown in Figure 1.2.1. On the other hand, if panelization is necessary, the four corners of the board should be rounded with a radius of 1mm-2mm after the panelization process. This ensures that the board can be processed without causing any damage or defects.
Lastly, the selection of materials is crucial for the successful fabrication of the PCB. The materials used should be of high quality, durable, and able to withstand the manufacturing process. In addition, the material should be chosen based on the intended application of the PCB, taking into consideration the operating temperature range, the dielectric constant, and the coefficient of thermal expansion.
In conclusion, designing a PCB that meets the fundamental technological requirements is crucial for successful fabrication. By adhering to the range of dimensions, the shape of the board, and the selection of materials, designers can ensure that the PCB will function properly and meet the intended specifications.