1. The naming of the project name (ZX-function-IPC-V serial number) - (knowledge-function-IPC interface-V serial number), minor changes to V1.1, major changes to 2.0
2. Understanding of the schematic diagram (working principle)
3. Clarify the packaging of each component, especially the spacing of each connector terminal
4. Clarify the function and power of various lines, so as to determine the line width during wiring
5. Clarify the relationship between board size, layer and aesthetics, which is more important
6. Component layout (this step takes more time) according to the layout rules of the schematic diagram, which is convenient for wiring, see the layout document below for details
7. Set the rules first when wiring (line spacing 0.3mm, line width min=0.254mm, preferably 0.3mm, max=2mm, signal line 0.3mm, power line 0.5 or 1 or 1.5mm, and the line width can be as wide as possible. In principle, this step takes time)
8. Set the copper coating rules (the distance between the copper coating and the positioning hole is 0.508mm)
9. Basic rules: Component label (width: 0.15, height: 1, note: Shunyijie board character height 0.8mm, width 0.15) via hole (0.6, 0.4) positioning hole via hole (3.2, 3.2), and then give Unit: mm
10. The outline of the drawing board adopts a forbidden wiring layer. Note that electrical wires cannot be used, and drawing wires are used.
11. Board shape selection box setting: automatic positioning of drawings - shift plus selection box - according to the definition of the selected object
12. Put a Keep-OutLayer ring (3.2mm) around the positioning hole of the board, and generate CAD drawings in the display of the Keep-Out Layer and Top Overlay layer for structural design
13. DRC check until Warn 0, RuleViolations 0 rules are set well
14. The positioning hole is set to 6mm to prevent short circuit after the nut is installed
15. The positioning hole is far away from the component, which is easy to install the nut
16. Create a new rule when applying copper, name ploy, rule inpolygon 0.508mm, and then remove the ring (3mm) of the Keep-Out Layer
17. Can't use ctrl+x and ctrl+y (mirror), only characters can be used (0.85 0.15)
18. Serpentine routing P+T, Shift+A to edit its properties and set its amplitude
19. When the line width and line spacing are relatively small, a margin should be left when the differential line is used for impedance, and the actual one is smaller than that made by software.
20. When drawing a 4-layer board, 1 top layer, 2 GND layer, 3 power supply layer, 4 bottom layer, when setting 2 and 3 layers, it can be set to signal (trace) or plane (plane division), via size (0.508 0.305 )
21. When the current is too large, the solder mask can be tinned or jumpered
22. The differential pair is set in the schematic diagram. It is required to set the names of the two differential signals. The suffixes must be "_P" and "_N" , that is, "+" and "-" representing the differential pair , and the prefix name must be exactly the same
21. Welding should be considered when the PCB board is made up
22. The structural dimension drawing must be given to me at 1:1 , and I will import it directly
23. 5mm craft edges and MARK points must be added when imposing