Title:
超薄型銅箔とその作製方法
Document Type and Number:
Japanese Patent JP7302046
Kind Code:
B2
Abstract:
To provide ultrathin copper foil of a small thickness and an excellent performance so as to allow the diversification and better performances of the ultrathin copper foil, and a method of producing the same.SOLUTION: Ultrathin copper foil is produced by a step of letting a metal foil carrier adsorb cyclohexanol hexaphosphate and 2-thiouracil to form an organic layer, immersing the carrier in an aqueous solution comprising the chemicals, a step of forming a film of a tungsten-nickel alloy including a small amount of rare earth elements, Pr and Nd, on the organic layer, immersing the organic layer in an electrolytic solution comprising nickel sulfate, sodium tungstate and a small amount of PR and Nd, and a step of forming ultrathin copper foil on the surface of the alloy film, immersing the alloy film in an electrolytic copper plating solution comprising copper sulfate and a composite additive, which is repeated three times, each time under a different condition. The electrolytic copper plating solution according to the present invention comprises copper sulfate and a composite additive constituted of lignin sodium sulfonate and chitosan oligosaccharide. The electrolytic copper plating solution realizes production of uniform ultrathin copper foil of a reduced weight thanks to the actions of the rare earth elements, Pr and Nd present in the alloy layer, realizes ultrathin/ultra-lightweight copper foil of a thickness of 3.5 μm, breaking the thickness limit to date of 4 μm, and imparts excellent properties, i.e., tensile strength of 510 MPa and the maximum elongation rate of 10% to the ultrathin/ultra-lightweight copper foil.SELECTED DRAWING: None
Inventors:
Leaf name
Liao Pingyuan
Liu Shaohua
Xie Kihyun
Lee Chun-hyun
old meigang
Liao Pingyuan
Liu Shaohua
Xie Kihyun
Lee Chun-hyun
old meigang
Application Number:
JP2022011775A
Publication Date:
July 03, 2023
Filing Date:
January 28, 2022
Export Citation:
Assignee:
Guangdong Jiayuan Technology Co., Ltd.
International Classes:
C25D1/04; C25D3/38; C25D7/06
Domestic Patent References:
| JP2016138337A |
Foreign References:
| CN107245735A |
Attorney, Agent or Firm:
TRY International Patent Attorney Corporation
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