| Description |
Standard |
Advance |
Description |
| a |
Min.
Diameter of Drilling Hole |
0.20
¨ª ( 8mil ) |
0.15
¨ª ( 6 mil ) |
|
| b |
Min
Diameter of Annular Ring
|
a +
0.20 ¨ª
a + 8 mil
|
a +
0.15 ¨ª
a + 6 mil |
| c |
Diameter
of Finished Hole
|
0.15
¨ª ( 6 mil ) |
0.10
¨ª ( 4 mil ) |
| d |
Internal
Ground / Signal Clearance
|
150
§ ( 6 mil ) |
100
§ ( 4 mil ) |
| e |
Min.
Diameter of Blind Via (Finished)
|
0.10
¨ª ( 4 mil |
0.05
¨ª (2 mil ) |
| f |
Min.
Diameter of Buried Via (Finished) |
0.10
¨ª ( 4 mil ) |
0.05
¨ª (2 mil ) |
|
g |
Max.
Hole Diameter & Board Thickness for Filled Via with
PSR
|
Diameter |
Thickness |
| 0.6
¨ª ( 24 mil)
|
2.0
mm (80 mil) |
|
h |
Max.
Hole Diameter & Board Thickness for Filled & Plated
Via in Pad
|
Diameter |
Thickness |
| 0.5
¨ª ( 20 mil ) |
2.0
mm ( 80 mil ) |
...Throwing
Power
|
|
|
|
...Aspect
Ratio
|
|
|
Drilling
