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US 11,145,867 B2Granted
Surface treated copper foil
AssigneeChang Chun Petrochemical Co., Ltd.
InventorsChien-Ming Lai, Yao-Sheng Lai, Jui-Chang Chou
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Abstract
Surface-treated copper foils exhibiting a void volume (Vv) in a range of 0.4 to 2.2 μm3/μm2 and an arithmetic mean waviness (Wa) lower than or equal to 0.4 μm are reported. Where the surface-treated copper foil is treated on the drum side and includes a treatment layer comprising a nodule layer. Such surface-treated copper foils can be used as a conductive material having low transmission loss, for example in circuit boards.
Claims14
A surface-treated copper foil comprising:
- an electrodeposited copper foil including a drum side and a deposited side, and
- a treatment layer disposed on the drum side providing a surface-treated side,
- wherein the treatment layer comprises a nodule layer and wherein the surface-treated side exhibits a void volume (Vv) in a range of 0.4 to 2.2 μm3/μm2 and an arithmetic mean waviness (Wa) lower than or equal to 0.4 μm.
A laminate comprising,
- a resin layer, and
- a surface-treated copper foil comprising,
- an electrodeposited copper foil including a drum side and a deposited side,
- a treatment layer disposed on the drum side providing a surface-treated side in contact with the resin layer, and wherein the treatment layer comprises a nodule layer,
- wherein the surface-treated side exhibits a void volume (Vv) in a range of 0.4 to 2.2 μm3/μm2, an arithmetic mean waviness (Wa) in a range of 0.1 to 0.4 μm, a core void volume (Vvc) in a range of 0.4 to 2 μm3/μm2, and a dale void volume (Vvv) in a range of 0.01 to 0.1 μm3/μm2, and a surface reflectance at 700 nm in a range of 40% to 70%.
2 more elements
A surface-treated copper foil comprising:
- an electrodeposited copper foil including a drum side and a deposited side, and
- a treatment layer disposed on the drum side providing a surface-treated side,
- wherein the treatment layer comprises a nodule layer and wherein the surface-treated side exhibits a void volume (Vv) in a range of 0.4 to 2.2 μm3/μm2 and an arithmetic mean waviness (Wa) lower than or equal to 0.4 μm,
- wherein the nodule layer comprises copper nodules, and the treatment layer further comprises at least one of a barrier layer, an anti-tarnish layer, and a coupling layer.
1 more element
Dependencies are inferred from the claim text.