FR4 PCB General Capabilities
- Single Sided
- Double Sided
- Multi-Layer
- Buried Via
- Blind Via
- Impedance Controlled
- Micro Via
- Laser Drilling
- RoHS Compliance
- Epoxy filled vias
FR4 PCB Specific Capabilities
Attribute: see (*) below as applies |
S/Sided |
D/Sided |
Multilayer |
Advanced |
Minimum Line/Spacing, Internal Layer |
N/A |
N/A |
.004”/.004” |
.003”/.003” |
Minimum Line/Spacing, External Layer |
.007”/.008” |
.007”/.008” |
.005”/.005” |
.003”/.003” |
Aspect Ratio (Thickness to Drill) |
6:1 |
6:1 |
8:1 |
10:1 |
Minimum Drilled Hole Size |
.010” |
.008” |
.008” |
.008” |
Land Size Internal (Diameter Over Drill) |
N/A |
N/A |
.015” |
.012” |
Land size External (Diameter Over Drill) |
.012” |
.012” |
.012” |
.010” |
Plane Clearance (Diameter Over Drill) |
.030” |
.030” |
.030” |
.024” |
Plated Hole Tolerance |
+/- .003” |
+/- .003” |
+/- .003” |
+/- .002” |
Minimum Dielectric Thickness |
N/A |
N/A |
.0025” |
.002” |
Minimum Core Thickness |
N/A |
N/A |
.004” |
.003” |
Minimum PCB Thickness ** |
.017” |
.018” |
.020” |
.020” |
Maximum PCB Thickness |
.125” |
.125” |
.250” |
.250” |
Thickness Tolerance (%) |
+/- 10 |
+/- 10 |
+/- 10 |
+/- 5 |
Maximum Board Dimensions * |
16” x 52”* |
19” x 22”* |
17” x 23”* |
17” x 23”* |
Fabrication Tolerances (overall dimension) |
+/- .010” |
+/- .010” |
+/- .010” |
+/- .005” |
Bow and Twist (Through Hole) % |
1.5 |
1.5 |
1.5 |
1 |
Bow and Twist (SMT) % |
.75 |
.75 |
.75 |
.75 |
Minimum Conductor to Edge |
.015” |
.015” |
.015” |
.010” |
Layer to Layer Registration Tolerance |
N/A |
.004” |
.004” |
.003” |
Component Pitch |
.025” |
.025” |
.025” |
.015” |
Soldermask Clearance |
.005” |
.005” |
.005” |
.004” |
Soldermask Dams |
.005” |
.005” |
.005” |
.004” |
Impedance Tolerance (>50 Ohms) % |
+/- 10 |
+/- 10 |
+/- 10 |
+/- 8 |
Maximum Layers |
1 |
1 |
12 |
16 |
Minimum Copper Weight Inners (oz.) |
N/A |
N/A |
|
1/4 |
Maximum Copper Weight Int. Ground (oz.) |
N/A |
N/A |
3 |
8 |
Maximum Copper Weight Int. Signal (oz.) |
N/A |
N/A |
2 |
6 |
Maximum Copper Weight Ext. Ground (oz.) |
4 |
4 |
2 |
10 |
Maximum Copper Weight Ext. Signal (oz.) |
4 |
4 |
3 |
10 |