Anti-curl copper foil
AssigneeChang Chun Petrochemical Co., Ltd.
InventorsJui-Chang Chou, Kuei-Sen Cheng, Yao-Sheng Lai, Huei-Fang Huang
Life of this patent
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Abstract
The present disclosure relates to an improved coated copper foil that exhibits anti-curl and anti-wrinkle properties; and to methods for manufacturing the foil. Typically, the copper foil of the instant disclosure has: (a) a shiny side; (b) a matte side, wherein the matte side has an MD gloss in the range of 330 to 620; (c) a difference in surface roughness (Rz) between the shiny side and the matte side in the range of 0.3 to 0.59 μm; and (d) a difference in tensile strength in the transverse direction of 1.2 kgf/mm2 or less.
Claims24
A copper foil having a resistance to curling comprising:
- a copper foil having dimensions in a machine direction MD, dimensions in a transverse direction TD, and a thickness, the copper foil further comprising:
- a. a shiny side;
- b. a matte side, wherein the matte side has a machine direction MD gloss, measured at an incidence angle of 60°, is in the range of 330 to 620;
- c. a difference in surface roughness Rz between the shiny side and the matte side in the range of 0.3 to 0.59 μm;
- and
- d. a difference in tensile strength taken from at least two samples across the foil in the transverse direction TD of 1.2 kgf/mm2 or less.
Dependencies are inferred from the claim text.