Procurement Services
| Item | HLC technology route | |||
| 2019 | 2020 | 2021 | ||
| Minimum PTH hole plate | Inner layer (mil) | DHS + 10 | DHS + 10 | DHS + 8 |
| Outer layer (mil) | DHS + 8 | DHS + 8 | DHS + 6 | |
| Anti-welding alignment accuracy (um) | +/- 40 | +/- 30 | +/- 25 | |
| Impedance control | ≥ 50ohms | +/-10% | +/-10% | -/-8% |
| < 50ohms | 5 Ω | 5 Ω | 4 Ω | |
| Minimum line width/line spacing (inner layer) | 3.0 / 3.0 | 2.6 / 2.6 | 2.5 / 2.5 | |
| Minimum line width/line spacing (outer layer) | 3.5 / 3.5 | 3.0 / 3.5 | 3.0 / 3.0 | |
| Maximum plug hole depression (um) | 30 | 20 | 15 | |
| Surface treatment type | ENIG, Immersion Ag, OSP, HASL, Immersion Tin, Hard Au | |||
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