常用封装尺寸

1inch ('') = 1000mil

1mil = 0.0254mm

1206
0805
0603
0402

0.12'' * 0.06'' = 3.2mm * 1.6mm
0.08'' * 0.05'' = 2.0mm * 1.2mm
0.06'' * 0.03'' = 1.6mm * 0.8mm
0.04'' * 0.02'' = 1.0mm * 0.5mm