JLCPCB can produce High-precision multilayer board with capabilities listed in below table.
| Min. Trace width/Spacing | Min. Via | Min. BGA |
|---|---|---|
| 3.5mil | 0.2mm | 0.25mm |
It is very convenient for customers to conduct an impedance matching design, according to JLCPCB’s laminated structure and related parameters. The PCB will be strictly produced in accordance with the following stackup.
Controlled Impedance PCB Parameters and Stackup
1.Prepreg dielectric constant:
| Prepreg type | Dielectric constant |
|---|---|
| 7628 | 4.6 |
| 3313 | 4.05 |
| 2116 | 4.25 |
2.Solder mask Parameters
| Solder mask thickness over the laminate | Solder mask thickness over traces | Solder mask dielectric constant |
|---|---|---|
| 0.8mil | 0.5mil | 3.8 |
3. Core dielectric constant
| Core dielectric constant |
|---|
| 4.6 |
For your convenience, we have designed an Impedance Calculator to help you calculate the impedance and the trace width you require.
4-Layer Impedance Control Stackup
Thickness
a) JLC7628 Stackup:
| Layer | Material Type | Thickness | |
|---|---|---|---|
| Top Layer1 | Copper | 0.035 mm | |
| Prepreg | 7628*1 | 0.2104 mm | |
| Inner Layer2 | Copper | 0.0152 mm | 0.25 mm (with copper core) |
| Core | Core | 0.2 mm | |
| Inner Layer3 | Copper | 0.0152 mm | |
| Prepreg | 7628*1 | 0.2104 mm | |
| Bottom Layer4 | Copper | 0.035 mm | |
| 0.2mm (7.87 mil) is nominal thickness of 7628 prepreg. Use 7.1 mil as the thickness when the controlled impedance tracks are on top/bottom, use 8.1 mil when tracks are inside. | |||
b) JLC3313 Stackup:
| Layer | Material Type | Thickness | |
|---|---|---|---|
| Top Layer1 | Copper | 0.035 mm | |
| Prepreg | 3313*1 | 0.0994 mm | |
| Inner Layer2 | Copper | 0.0152 mm | 0.45 mm (with copper core) |
| Core | Core | 0.45 mm | |
| Inner Layer3 | Copper | 0.0152 mm | |
| Prepreg | 3313*1 | 0.0994 mm | |
| Bottom Layer4 | Copper | 0.035 mm | |
| 0.1mm (3.94 mil) is nominal thickness of 7628 prepreg. Use 3.5 mil as the thickness when the controlled impedance tracks are on top/bottom, use 4.5 mil when tracks are inside. | |||
a) JLC7628 Stackup:
| Layer | Material Type | Thickness | |
|---|---|---|---|
| Top Layer1 | Copper | 0.035 mm | |
| Prepreg | 7628*1 | 0.2104 mm | |
| Inner Layer2 | Copper | 0.0152 mm | 0.45 mm (with copper core) |
| Core | Core | 0.4 mm | |
| Inner Layer3 | Copper | 0.0152 mm | |
| Prepreg | 7628*1 | 0.2104 mm | |
| Bottom Layer4 | Copper | 0.035 mm | |
| 0.2mm (7.87 mil) is nominal thickness of 7628 prepreg. Use 7.1 mil as the thickness when the controlled impedance tracks are on top/bottom, use 8.1 mil when tracks are inside. | |||
b) JLC3313 Stackup:
| Layer | Material Type | Thickness | |
|---|---|---|---|
| Top Layer1 | Copper | 0.035 mm | |
| Prepreg | 3313*1 | 0.0994 mm | |
| Inner Layer2 | Copper | 0.0152 mm | 0.7 mm (with copper core) |
| Core | Core | 0.7 mm | |
| Inner Layer3 | Copper | 0.0152 mm | |
| Prepreg | 3313*1 | 0.0994 mm | |
| Bottom Layer4 | Copper | 0.035 mm | |
| 0.1mm (3.94 mil) is nominal thickness of 7628 prepreg. Use 3.5 mil as the thickness when the controlled impedance tracks are on top/bottom, use 4.5 mil when tracks are inside. | |||
a) JLC7628 Stackup:
| Layer | Material Type | Thickness | |
|---|---|---|---|
| Top Layer1 | Copper | 0.035 mm | |
| Prepreg | 7628*1 | 0.2 mm | |
| Inner Layer2 | Copper | 0.0152 mm | 0.7 mm (with copper core) |
| Core | Core | 0.7 mm | |
| Inner Layer3 | Copper | 0.0152 mm | |
| Prepreg | 7628*1 | 0.2 mm | |
| Bottom Layer4 | Copper | 0.035 mm | |
| 0.2mm (7.87 mil) is nominal thickness of 7628 prepreg. Use 7.1 mil as the thickness when the controlled impedance tracks are on top/bottom, use 8.1 mil when tracks are inside. | |||
b) JLC3313 Stackup:
| Layer | Material Type | Thickness | |
|---|---|---|---|
| Top Layer1 | Copper | 0.035 mm | |
| Prepreg | 3313*1 | 0.0994 mm | |
| Inner Layer2 | Copper | 0.0152 mm | 0.9 mm (with copper core) |
| Core | Core | 0.865 mm | |
| Inner Layer3 | Copper | 0.0152 mm | |
| Prepreg | 3313*1 | 0.0994 mm | |
| Bottom Layer4 | Copper | 0.035 mm | |
| 0.1mm (3.94 mil) is nominal thickness of 7628 prepreg. Use 3.5 mil as the thickness when the controlled impedance tracks are on top/bottom, use 4.5 mil when tracks are inside. | |||
a) JLC7628 Stackup:
| Layer | Material Type | Thickness | |
|---|---|---|---|
| Top Layer1 | Copper | 0.035 mm | |
| Prepreg | 7628*1 | 0.2104 mm | |
| Inner Layer2 | Copper | 0.0152 mm | 1.1mm (with copper core) |
| Core | Core | 1.065 mm | |
| Inner Layer3 | Copper | 0.0152 mm | |
| Prepreg | 7628*1 | 0.2104 mm | |
| Bottom Layer4 | Copper | 0.035 mm | |
| 0.2mm (7.87 mil) is nominal thickness of 7628 prepreg. Use 7.1 mil as the thickness when the controlled impedance tracks are on top/bottom, use 8.1 mil when tracks are inside. | |||
b) JLC3313 Stackup:
| Layer | Material Type | Thickness | |
|---|---|---|---|
| Top Layer1 | Copper | 0.035 mm | |
| Prepreg | 3313*1 | 0.0994 mm | |
| Inner Layer2 | Copper | 0.0152 mm | 1.3 mm (with copper core) |
| Core | Core | 1.265 mm | |
| Inner Layer3 | Copper | 0.0152 mm | |
| Prepreg | 3313*1 | 0.0994 mm | |
| Bottom Layer4 | Copper | 0.035 mm | |
| 0.1mm (3.94 mil) is nominal thickness of 3313 prepreg. Use 3.5 mil as the thickness when the controlled impedance tracks are on top/bottom, use 4.5 mil when tracks are inside. | |||
a) JLC7628 Stackup:
| Layer | Material Type | Thickness | |
|---|---|---|---|
| Top Layer1 | Copper | 0.035 mm | |
| Prepreg | 7628*1 | 0.2104 mm | |
| Inner Layer2 | Copper | 0.0152 mm | 1.5 mm (with copper core) |
| Core | Core | 1.465 mm | |
| Inner Layer3 | Copper | 0.0152 mm | |
| Prepreg | 7628*1 | 0.2104 mm | |
| Bottom Layer4 | Copper | 0.035 mm | |
| 0.2mm (7.87 mil) is nominal thickness of 7628 prepreg. Use 7.1 mil as the thickness when the controlled impedance tracks are on top/bottom, use 8.1 mil when tracks are inside. | |||
Note: 2.0 thickness 4-Layer board only provides JLC7628 Stackup.
6-Layer Impedance Control Stackup
Thickness
b) JLC3313 Stackup:
| Layer | Material Type | Thickness | |
|---|---|---|---|
| Top Layer1 | Copper | 0.035 mm | |
| Prepreg | 3313*1 | 0.0994 mm | |
| Inner Layer2 | Copper | 0.0152 mm | 0.35 mm (with copper core) |
| Core | Core | 0.35 mm | |
| Inner Layer3 | Copper | 0.0152 mm | |
| Prepreg | 2116*1 | 0.1088 mm | |
| Inner Layer4 | Copper | 0.0152 mm | 0.35 mm (with copper core) |
| Core | Core | 0.35 mm | |
| Inner Layer5 | Copper | 0.0152 mm | |
| Prepreg | 3313*1 | 0.0994 mm | |
| Bottom Layer6 | Copper | 0.035 mm | |
| 0.1mm (3.94 mil) is nominal thickness of 3313 prepreg. Use 3.5 mil as the thickness of 3313 prepreg when the controlled impedance tracks are on top/bottom, use 5.5 mil(2116 prepreg) or 8.5mil(7628 prepreg) when tracks are inside. | |||
b) JLC3313 Stackup:
| Layer | Material Type | Thickness | |
|---|---|---|---|
| Top Layer1 | Copper | 0.035 mm | |
| Prepreg | 3313*1 | 0.0994 mm | |
| Inner Layer2 | Copper | 0.0152 mm | 0.55 mm (with copper core) |
| Core | Core | 0.55 mm | |
| Inner Layer3 | Copper | 0.0152 mm | |
| Prepreg | 2116*1 | 0.1088 mm | |
| Inner Layer4 | Copper | 0.0152 mm | 0.55 mm (with copper core) |
| Core | Core | 0.55 mm | |
| Inner Layer5 | Copper | 0.0152 mm | |
| Prepreg | 3313*1 | 0.0994 mm | |
| Bottom Layer6 | Copper | 0.035 mm | |
| 0.1mm (3.94 mil) is nominal thickness of 3313 prepreg. Use 3.5 mil as the thickness of 3313 prepreg when the controlled impedance tracks are on top/bottom, use 5.5 mil(2116 prepreg) or 8.5mil(7628 prepreg) when tracks are inside. | |||
b) JLC3313 Stackup:
| Layer | Material Type | Thickness | |
|---|---|---|---|
| Top Layer1 | Copper | 0.035 mm | |
| Prepreg | 3313*1 | 0.0994 mm | |
| Inner Layer2 | Copper | 0.0152 mm | 0.7 mm (with copper core) |
| Core | Core | 0.7 mm | |
| Inner Layer3 | Copper | 0.0152 mm | |
| Prepreg | 7628*1 | 0.2028 mm | |
| Inner Layer4 | Copper | 0.0152 mm | 0.7 mm (with copper core) |
| Core | Core | 0.7 mm | |
| Inner Layer5 | Copper | 0.0152 mm | |
| Prepreg | 3313*1 | 0.0994 mm | |
| Bottom Layer6 | Copper | 0.035 mm | |
| 0.1mm (3.94 mil) is nominal thickness of 3313 prepreg. Use 3.5 mil as the thickness of 3313 prepreg when the controlled impedance tracks are on top/bottom, use 5.5 mil(2116 prepreg) or 8.5mil(7628 prepreg) when tracks are inside. | |||
Note: The 6-Layer board temporarily only provides JLC3313 Stackup.