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1mil=10^-3inch=0.0254mm
| 单位mil | 单位mm |
|---|---|
| 1mil | 0.0254mm |
| 2mil | 0.0508mm |
| 3mil | 0.0762mm |
| 4mil | 0.1160mm |
| 5mil | 0.1270mm |
| 6mil | 0.1524mm |
| 7mil | 0.1778mm |
| 8mil | 0.2032mm |
总结：一般PCB厂家的最小线宽和线距0.12mm（4mil）左右，也就是，所以自己在设计PCB时线宽和线距尽量设置大于0.16mm(6mil)。