Drilling
Description
Standard
Description
a
Min. Diameter of Finished Hole
0.40 ( 15.7 mil )
b
Min Diameter of Land
> a + 300 + t
( > a + 12 mil + t )
c
Internal Ground / Signal Clearance
> 1.0 mm ( 40 mil )
d
Min. Drill Diameter
0.55 ( 21.6 mil )
e
Outer Layer Clearance for NPTH
0.20 ( 8 mil )
f/g
Blind Via & Buried Via
> d + 2t
i
Max. Hole Diameter & Board Thickness
for Filled & Plated Via in Pad
Diameter
0.6 ( 23.69 mil )
j
Max. Hole Diameter & Board Thickness for Filled & Plated Via in Pad
Diameter
0.5 ( 19.7 mil )
...Throwing Power
Above 70%
...Aspect Ratio
10