| product | Double sided light4.5 μ m Copper foil | Double sided light6 μ m Copper foil | Testing instruments and inspection methods |
| Mass per unit area(g/m2) | 39-42 | 52-56 | electronic balance |
| Tensile strength (kgf/m2) | ≥30.0 | ≥33 | Tensile testing machine |
| Elongation rate(%) | ≥3.0 | ≥5.0 | |
Surface roughness（ μ m) Smooth surfaceRa Rough surfaceRz | ≤0.43 | ≤0.43 | Roughness tester |
| ≤3.0 | ≤3.0 | ||
| 厚度公差 (μm) | -0，+2 | -0，+2 | 千分尺 |
| 润湿性 (达因) | ≥38 | ≥38 | 达因笔 |
| 抗氧化性能 | 140±2℃ 烘烤15min无氧化变色 | 140±2℃ 烘烤15min无氧化变色 | 烘箱恒温烘烤 |
| 宽幅偏差 (mm) | ±1.0 | ±1.0 | 菲林尺 |
| 铜纯度 (%) | Cu+Ag≥99.8 | Cu+Ag≥99.8 | 委外检测 |
