IMS Board
Material Thickness
a. Min. Diameter of Hole -
Aluminum Base Plate
a. Min. Diameter of Hole -
Copper Base Plate
Punched Hole
Drilled Hole
Punched Hole
Drilled Hole
1.0 mm ( 40 mil )
1.5mm ( 60 mil )
1.0mm ( 40 mil )
1.5mm ( 60 mil )
1.0 mm ( 40 mil )
1.6 mm ( 62 mil )
2.4 mm ( 94 mil )
1.2 mm ( 47 mil )
2.4 mm ( 94 mil )
1.6 mm ( 62 mil )
2.0 mm ( 80 mil )
3.0 mm ( 118 mil )
1.4 mm ( 55 mil )
3.0 mm ( 118 mil )
2.0 mm ( 80 mil )
3.2 mm ( 125 mil )
4.8 mm ( 189 mil )
1.6 mm ( 62 mil )
4.8 mm ( 189 mil )
3.2 mm ( 125 mil )

Material Thickness
b. Min. Clearance of Conductor
to Board Edge
c. Min. Clearance of Conductor to Hole Edge
Punched Hole
Drilled Hole
Punched Hole
Drilled Hole
1.0mm ( 40 mil )
1.5mm ( 60 mil )
1.0mm ( 40 mil )
1.2mm ( 47 mil )
1.0mm ( 40 mil )
1.6 mm ( 62 mil )
2.1 mm ( 82 mil )
1.2 mm ( 47 mil )
1.8 mm ( 70 mil )
1.2 mm ( 47 mil )
2.0 mm ( 80 mil )
2.5 mm ( 98 mil )
1.4 mm ( 55 mil )
2.2 mm ( 86 mil )
1.4 mm ( 55 mil )
3.2 mm ( 125 mil )
3.7 mm ( 145 mil )
1.6 mm ( 62 mil )
3.4 mm ( 133 mil )
1.6 mm ( 62 mil )

a
Minimum Diameter of Hole
b
Minimum Clearance of Conductor to Board Edge
c
Minimum Clearance of Conductor to Hole Edge