No. ITEM UNIT SPEC. 备注 1 PURITY wt% ≥99.99   2 DENSITY g/c m3 ≥7.08 (Relative Density: >99%)   3 IMPURITY Fe wt% ≤0.002   Cr wt% ≤0.0005   Ni wt% ≤0.001   Cu wt% ≤0.0005   Si wt% ≤0.005   4 SIZE W mm ≤±0.3   L mm ≤±0.3   T mm ≤+0.3/-0   5 BONDING Ratio % ≥95 97~98% Tolerance mm ≤± 1 ≤± 0.5 Warpage mm ≤3 ≤2 6 VISUAL INSPECTION