The roadboard is the support body of electronic components.It is mainly composed of pads, holes, installation holes, wires, components, plug -in plug -ins, filling, electrical boundaries, etc. The circuit board makes the circuit mini and intuitive.EssenceSo do you know what the principle of the circuit board is?What is its production process?
Introduction to the circuit board
The circuit board (PCB for short), also known as circuit board, PCB board, aluminum substrate, high -frequency board, ultra -thin circuit board, ultra -thin circuit board, printing (copper engraving technology) circuit board, etc., which is important.Electronic components are the supporting body of electronic components and a provider of electronic component line connection.The traditional circuit board uses the method of printing etching resistance to make circuit circuits and diagrams, so it is called a printing circuit board or printing circuit board.Due to the continuous tiny and refined electronics, most circuit boards are currently using an attached etching resistant (compressive membrane or coating). After exposure, the circuit board is used to make a carved carved.
The principle of the circuit board
The circuit board is mainly composed of pads, perforated, installation holes, wires, components, plug -in plug -ins, filling, electrical boundaries, etc.Common plates include Single Layer PCB, Double Layer PCB, and Multi Layer PCB.The main functions of each component are as follows:
① pad: Metal holes used for welding component pins.
② Pole from perforated: There are metal perforated and non -metallic pores, where the metal pores are used to connect the pins of the component between the layers.
③ Installation holes: used for fixed circuit boards.
④ wire: Electrical network copper film for connecting component pins.
⑤ Plug -in: The component of the connection between the circuit board.
⑥ Filling: Copper applied to the ground network can effectively reduce impedance.
于 Electric boundary: It is used to determine the size of the circuit board, and the components on all circuit boards cannot exceed the boundary.
⑧ Working principle: Use the plate -based insulation material to isolate the surface of the copper foil on the surface, so that the current can flow along the pre -designed routes in various components such as doing work, magnifying, attenuation, modulation, demodulation, encoding and other functions.
The production process of circuit board
Although there are many ways to make and process circuit boards, traditional fast -moving plate methods can be divided into two categories: physical and chemical methods:
① Physical method:
By using various tools and electric tools, hand -handed the copper carvings that are not needed on the line board.This method is more laborious and low, and only relatively simple lines can be adopted.
Features: Time -consuming time, difficulty in accuracy, and incurable existence, high requirements for operation, rarely adopted at present.
② Chemical method:
By covering the protective layer on the blank copper plate and eroding unnecessary copper in the corrosive solution, it is the method used by most developers.There are many methods to cover the protective layer. It mainly includes the most traditional manual paint methods, adhesive custom -made non -drying methods, film photosensitive methods, and hot transfer printing PCB board methods developed in recent years.
Features: The craftsmanship is relatively complicated, but the accuracy is controllable. It is currently the most widely used quick -making method, but there are still many problems.
③ Handmade paint:
Use a brush or hard pen to manually draw the shape of the line on the blank copper plate. After drying it, you can put it in the solution and directly corrode.
④ Paste non -dry glue:
There are all kinds of non -dry glue on the market to be made into strips and circular -like. They combine different dry glue on the blank line board according to the need, and can be corroded after sticking.
⑤ Film photosensitive:
Print the PCB line board map through a laser printer on the film. Apply a layer of sensitive material (available on the market on the market) on the blank copper plate.Corrosion in the solution.
⑥ Hot transfer:
Print the line directly on the blank line board through the hot transfer printer, and then put it in the corrosion solution to corrode.
In summary: The traditional physical board method is spent and time -consuming and accurate. Although the accuracy is controllable, the chemical fast board method is complicated and unfavorable to environmental protection.Whether it is a physical method or a chemical method, both have higher requirements for operating skills. Therefore, neither can be called a good way to help engineers realize fast -moving boards.

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