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The design of the printed circuit board is based on the schematic diagram of the circuit to implement the functions required by the circuit user. The design of printed circuit boards mainly refers to layout design, which requires various factors such as internal electronic components, metal wiring, layout of through-holes and external connections, electromagnetic protection, heat dissipation, and crosstalk.
Excellent circuit design can save production costs and achieve good circuit performance and heat dissipation performance. Simple layout design can be achieved by hand, but complex circuit design generally needs to be achieved with the help of computer-aided design (CAD), and well-known design software such as Orcad, PADS (also known as PowerPCB), Altium Designer (also known as Protel), FreePCB, CAM350, etc.
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A printing press is a kind of equipment used to make flat prints, which is mainly used to produce works such as posters, business cards, books, etc. With the help of printing presses, it is possible to produce large quantities of fine prints more efficiently.
The way circuit boards are made is often referred to as PCB (Printed Circuit Board), but it is not done by a printing press in the traditional sense. Printed circuit boards are an important component used in electronic products, which basically uses a chemical etching process to coat the desired circuit on glass fiber or a thick plastic material, and then drill holes and bond electronic components in it.
While the designs on these printed circuit boards may resemble text, patterns, or images, they are manufactured using a fully automated production line process rather than traditional methods such as manual operations or lead printing presses. So, while they are called"Printed circuit boards", but they are not actually printed with a conventional printing press.
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The role of the printed part surface of the circuit board is the bridge of the component link.
For the production of printed boards, because many designers do not understand the production process of circuit boards, the circuit diagram they design is only the most basic circuit diagram and cannot be directly used in production. Therefore, before the actual production, it is necessary to modify the circuit file and not only make a film diagram that can be suitable for the production process of the factory.
Precautions for circuit board printing:
A printed board component, from manufacturing, inspection, assembly, judgment, debugging to the assembly and commissioning of the whole machine, until the use and maintenance, are all closely related to the reasonableness of the printed board; For example, the shape of the board is not well selected, the processing is difficult, the lead hole is too small, the assembly is difficult, and the height of the pilot is not left, etc., which may lead to an increase in costs and a long time in man-hours. It requires a sense of responsibility and rigorous style of designers, as well as experience that is constantly summarized and improved in practice.
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Look at the production capacity and equipment.
Shenzhen convergence circuit is ok.
1. Find out the general working principle, working process and signal flow of the electrical circuit, and the position of the main components and core components on the PCB board. >>>More
There is a thickness tester.
Conformal coating is preferred Xinwei conformal coating, there are a variety of materials to choose from, and the thickness can be selected from 20um-10mm. Choose different materials and different processes to determine the thickness. The spray is thinner, the brush will be thicker, and then it depends on the material, some materials are thick, some are thin, you can consult Xinwei conformal paint customer service. >>>More