Use:  special alloys optimized for use as drill entrymaterial

Thickness:          0.14 mm-0.20mm

Thickness Tolerance:  ±10???

Size Tolerance:       ±3 mm

Warpage:???          ≤1% of diagonal

Roughness:         3.5 μm ±1 μm

Standard Size:  36"×48"???40"×48"???42"×48"

              37"×49"???41"×49"???43"×49"

Advantages:

1. Good protection of the sheet free CCL from scratches

and pressing marks.

2. Excellent guides to high speed drilling when drill bittouch

the surface.

3. Good conductor character and good cleaning of the drillcan

???greatly extend drill’s life and avoid oxidation of thesurface.

4. Burr-free drilling and excellent hole wall quality.