PCB Tech - What you need to know about PCB circuit board design

A PCB (Electric circuit) board (Printed Circuit Board) can combine a lot of electronic components together, which can spare space and will not hinder the operation of the circuit. The PCBA assembly plant is an important electronic component, a support for electronic components, and a provider of circuit connections for electronic components. Because it is made using electronic printing technology, it is called a "printed" circuit board. When designing a PCB circuit board, there are many processes. First of all, the various parameters of the PCB circuit board must be set. Secondly, to install the various parts in the right place.

1. Enter the PCB design system (system) and set the relevant parameters

Set the environmental parameters of the design system according to personal habits, such as the size and type of grid points, the size and type of cursor, etc. Generally speaking, the default values of the system can be used. In addition, parameters such as the size and number of layers of the printed circuit board (Printed Circuit Board) must be set

2, generate the introduction network (Network) table

Network (Network) table is the bridge and link between the circuit (Electric circuit) schematic design (Design) and the printed circuit board design, which is very important. The netlist can be generated from the schematic diagram of the circuit, or extracted from an existing money-system circuit board file. When the netlist is introduced, it is necessary to inspect and correct the errors in the circuit schematic design

3. Arrange the location of each part package

The automatic layout function of the system can be used, but the automatic layout function is not perfect, and it is necessary to manually adjust the position of each part package

4. Carry out the circuit (Electric circuit) board wiring

The prerequisite for the automatic wiring of the Electric circuit board is to set up the safe distance, wire form, etc. The PCBA assembly plant is an important electronic component, a support for electronic components, and a provider of circuit connections for electronic components. Because it is made using electronic printing technology, it is called a "printed" circuit board. SMT manufacturers have high assembly density, small size and light weight of electronic products. The volume and weight of SMT components are only about 1/10 of traditional plug-in components. Generally, after SMT is adopted, the volume of electronic products is reduced by 40% to 60%, and the weight is reduced by 60%. %～80%. At present, the automatic wiring function of the device (shèbèi) is relatively complete, and general circuit diagrams can be routed; but the layout of some lines is not satisfactory, and it can also be wired manually

5. Output via printer or save in hard copy (Save)

After completing the wiring of the PCB circuit board, save the completed PCB circuit diagram file, and then use various graphic output devices (shèbèi), such as a printer or a plotter to output the PCB circuit board wiring diagram.