source:Other information release time:2023-05-12 Hits: Popular:PCB Assembly company
1. The size of the plug -in hole depends on your components, but it must be greater than your component feet. It is recommended to be greater than at least 0.2mm or more.
0.8, which is difficult to insert from processing tolerance.
2. The plug -in hole (PTH) pad outer ring cannot be less than 0.2mm (8mil), of course, the better.
3. Plug -in holes (PTH) pores from the pores to the pores (from the edge of the hole to the hole) cannot be less than 0.3mm. Of course, the bigger the better.
4. Point distance from pads to the appearance line 0.508mm (20mil)
Anti -welding
1. Plug -in holes open the window, SMD opening window cannot be less than 0.1mm (4mil)
character
The design of characters directly affects production. Whether characters are clearly designed with character is very related.
1. The character width should not be less than 0.153mm (6mil), the word height cannot be less than 0.811mm (32mil), and the relationship between the best ratio of the height ratio is 5 is that the word width is 0.2mm height of 1mm.
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