| PAD TO HOLE SIZE |
Production |
Standard |
Advanced |
Emerging |
| Minimum Plated Hole Size * (Finished) |
.010 |
.006 |
.004 |
< .004 |
| Tolerance - Plated Hole Size |
+/- .003 |
+/- .003 |
+/- .002 |
+/- .001 |
Minimum Inner Layer Pad
1 mil annular ring) |
+.018
OVER F.H.S. |
+.018
OVER F.H.S. |
+ .012 OVER F.H.S. |
+ .008 OVER F.H.S. |
| Mech. Min. Drill Hole Size |
.010 |
.010 |
.006 |
< .006 |
| Normal Finished Hole Size |
.010 |
.008 |
.004 |
< .004 |
| Plane Relief Diameter Over Drilled Hole |
.024 |
.020 |
.016 |
.010 |
Minimum Outer Layer Pad
(1 mil annular ring) |
.012
OVER F.H.S. |
.010
OVER F.H.S. |
.008
OVER F.H.S. |
.006
OVER F.H.S. |
| Min. Outer Non-Plated Hole to Metal |
.010 |
.010 |
.006 |
< .006 |
| Min. Inner Non-Plated Hole to Metal |
.010 |
.010 |
.006 |
< .006 |
| Max. Number holes/sq. in. (average over board) |
200 |
250 |
300 + |
500 + |
| * On particular sizes holes less than 50 mil in diameter |
