Allegro孔径、焊盘大小关系

尺寸：

Drill_Size >= Physical_Pin_Size+10mil(我们一般取0.25~0.3mm)

Regular Pad >= Drill_Size+16mil(Drill_Size < 50mil) (0.4mm 1.27)

Regular Pad >= Drill_Size+30mil(Drill_Size >= 50mil) (0.76mm 1.27)

Regular Pad >= Drill_Size+40mil(Drill为矩形或椭圆形时) (1mm )

Regular Pad ，Thermal Relief，Anti PAD焊盘之间的尺寸关系或公式

1、Anti Pad直径＝Thermal Relief直径＝Regular Pad+20mil (我们一般取0.2mm)

2、Soldermask直径=Regular Pad+4mil (我们一般取0.1mm)

3、Flash内径＝Drill_Size+16mil（我们一般取0.5mm）

4、Flash外径＝Drill_Size+30mil（我们一般取0.8mm）

5、Flash焊盘开口Wed大小：

当Drill_Size <= 10mil时：wed = 12mil；

当Drill_Size = 11~40mil时：wed = 15mil；

当Drill_Size = 41~70mil时：wed = 20mil；

当Drill_Size = 71~170mil时：wed = 30mil；

当Drill_Size >= 170mil时：wed = 40mil；